No, if the moon were twice as massive, the attractive force of Earth on the moon and the moon on Earth would not be twice as large. This is because the force of gravitational attraction between two objects depends not only on their masses but also on their separation distance.
The force of gravitational attraction between two objects is given by the formula:
F = G * (m1 * m2) / r^2
where F is the force of attraction, G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between their centers of mass.
If the moon were twice as massive, its mass in the above formula would be doubled, resulting in a doubled force of attraction between the Earth and the moon. However, the distance between the Earth and the moon would remain the same, so the force of attraction between the Earth and the moon would not be twice as large. It would be slightly larger than before, but not exactly twice as large.
Similarly, the force of attraction of the moon on Earth would also increase slightly but not exactly by a factor of two. The actual change in the force of attraction would depend on the specific masses and distances involved.
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a circular area with a radius of 6.50 cm lies in the plane. what is the magnitude of the magnetic flux through this circle due to a uniform magnetic field that points (a) in the direction? (b) at an angle of from the direction? (c) in the direction?
The magnitude of the magnetic flux through a circular area with radius r in a uniform magnetic field B is given by Φ = Bπr².
The magnetic flux through an area is a measure of the number of magnetic field lines passing through that area. It is given by the dot product of the magnetic field vector and the area vector, integrated over the surface. In the case of a uniform magnetic field passing through a circular area with radius r, the magnitude of the flux can be simplified to Φ = Bπr².
(a) If the magnetic field points perpendicular to the plane of the circle, then the magnitude of the flux is
Φ = Bπr²
= (B)(π)(0.065 m)²
= 1.33 × 10⁻⁴ T⋅m².
(b) If the magnetic field makes an angle θ with the perpendicular to the plane of the circle, then the magnitude of the flux is
Φ = Bcosθ(πr²)
= (Bcos45°)(π)(0.065 m)²
= 9.26 × 10⁻⁵ T⋅m².
(c) If the magnetic field points parallel to the plane of the circle, then the magnitude of the flux is zero since the field lines are perpendicular to the area vector of the circle.
In summary, the magnitude of the magnetic flux through the circular area depends on the angle between the magnetic field and the perpendicular to the plane of the circle, and is given by Φ = Bcosθ(πr²) if the field makes an angle θ with the perpendicular, and is zero if the field is parallel to the plane of the circle.
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How does the structure of atoms in a substance determine the substance's conductivity? (1 point)
O If an atom's outer shell of electrons is positively charged, the substance is a good conductor.
O If an atom's nucleus is positively charged, the substance is a good conductor.
O If an atom's outer shell of electrons is loosely bound to the nucleus, the substance is a good conductor.
O If an atom's outer shell of electrons is tightly bound to the nucleus, the substance is a good conductor.
Answer:
If an atom's outer shell of electrons is loosely bound to the nucleus, the substance is a good conductor.
The structure of atoms in a substance determines the substance's conductivity is, If an atom's outer shell of the electron is loosely bound to the nucleus, then the substance is a good conductor. Hence, option C is correct.
Substances are differentiated into three types based on the electrons present in the valence shell. The valence shell is the outermost orbital of the atom and the electrons present in it are called valence electrons. The valence electrons are said to be free electrons and these electrons do not involve in chemical bonding.
The types of materials are conductors, insulators, and semiconductors. The material that has free electrons and carries current or heats through it is called a conductor. The materials that do not have free electrons and it does not carry current or heat are called insulators. The material that partially conducting and partially insulating are called semi-conductors.
Hence, the conductivity of the substance is determined by an atom's outer shell of the electron being loosely bound to the nucleus, the substance is a good conductor.
Hence, the ideal solution is option C.
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in a laundromat, during the spin-dry cycle of a washer, the rotating tub goes from rest to its maximum angular speed of 2.2 rev/s in 6.8 s. you lift the lid of the washer and notice that the tub decelerates and comes to a stop in 14.5 s. assuming that the tub rotates with constant angular acceleration while it is starting and stopping, determine the total number of revolutions undergone by the tub during this entire time interval.
The total number of revolutions undergone by the tub during the entire time interval is 23.1 revolutions.
To determine the total number of revolutions, we need to calculate the angular displacement of the tub during the starting phase, the stopping phase, and the constant speed phase.
During the starting phase, the tub goes from rest to its maximum angular speed of 2.2 rev/s. We can use the equation of motion for angular acceleration:
ω = ω₀ + αt
Given that ω₀ = 0 (initial angular speed) and ω = 2.2 rev/s (final angular speed), and t = 6.8 s (time), we can solve for α (angular acceleration). Using this angular acceleration, we can calculate the angular displacement (θ) during the starting phase.
During the stopping phase, the tub decelerates and comes to a stop. The angular displacement during this phase can be calculated using the same equation of motion for angular acceleration, with ω = 0 (final angular speed), ω₀ = 2.2 rev/s (initial angular speed), and t = 14.5 s (time).
Finally, during the constant speed phase, the angular displacement is given by ωt, where ω is the constant angular speed of 2.2 rev/s and t is the time interval between the end of the starting phase and the beginning of the stopping phase.
Adding up the angular displacements from each phase will give us the total angular displacement, which can be converted to the total number of revolutions by dividing it by 2π.
Calculating these values will result in a total of 23.1 revolutions undergone by the tub during the entire time interval.
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waves workbook module 5, exercise 10a, how does the wavelength change in the grey medium?
General, the wavelength of a wave can change when it enters a medium with a different refractive index.
When a wave enters a medium, its speed changes, which causes the wavelength to change while the frequency remains constant. This is due to the relationship between the speed of light, wavelength, and frequency given by the equation c = λf, where c is the speed of light, λ is the wavelength, and f is the frequency
. When the speed of light changes, either due to a change in the medium or other factors, the wavelength changes proportionally to maintain a constant frequency.
The amount by which the wavelength changes depends on the refractive index of the medium, which is a measure of how much the speed of light is slowed down in that medium.
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a block of mas 3 m can move without friction on a horizontal table. this blockis attached to another block of mass 33m by a cord to another block of mass 33m by a cord that passes over a frictionless pulley as shown. if the masses of the cord and the pulley are negligible, what is the magnitude of the acceleration of the descending block
The magnitude of the acceleration of the descending block is (5/33) times the acceleration due to gravity.
The force of gravity acts on both blocks, but since the pulley is frictionless and the cord has negligible mass, the tension in the cord must be the same on both sides of the pulley. Let's assume that the descending block of mass 33m has an acceleration of a and the ascending block of mass 3m has an acceleration of a'.
The net force acting on the descending block is the difference between the force of gravity and the tension in the cord. Therefore, we can write:
(33m)g - T = (33m)a
where g is the acceleration due to gravity and T is the tension in the cord. Similarly, the net force acting on the ascending block is:
T - (3m)g = (3m)a'
Since the tension in the cord is the same on both sides of the pulley, we can equate T in the two equations above to get:
(33m)g - (3m)g = (33m)a + (3m)a'
Simplifying, we get:
a' - a = (10/33)g
But we know that the blocks are connected by a cord that cannot stretch or compress, so the acceleration of the two blocks must be the same in magnitude. Therefore, a' = a, and we can solve for a:
2a = (10/33)g
a = (5/33)g
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A metallic enclosure that prevents the entry or escape of an electromagnetic field is known as a:
a. mantrap
b. bollard
c. Newton cage
d. Faraday cage
A metallic enclosure that prevents the entry or escape of an electromagnetic field is known as a Faraday cage. A Faraday cage is named after the English scientist Michael Faraday, who discovered the principle of electromagnetic induction.
A Faraday cage is a metallic enclosure that is designed to block external electromagnetic radiation from entering the enclosed space and to prevent electromagnetic radiation generated inside the enclosure from escaping.
The Faraday cage works by redistributing the electromagnetic field so that it cancels out the external field or reflects it away from the enclosed space. This is achieved through the conductive properties of the metal enclosure, which allows the electric charge to flow freely across its surface, creating an equal and opposite charge that cancels out the external field.
Faraday cages are commonly used in various applications, including electronic testing, electrical engineering, and scientific research, to protect sensitive equipment and experiments from interference caused by external electromagnetic radiation.
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After two neutral solids, A and B, were together, solid A acquired a net negative charge. Solid B, therefore, experienced a net
Solid B acquired a net positive charge after being with neutral solid A that acquired a net negative charge.
When two neutral solids are in contact, they can exchange electrons, leading to a net charge on one or both of the solids. In this case, solid A gained electrons and became negatively charged, leaving solid B with a deficiency of electrons and a net positive charge. This process is known as charging by contact or conduction.
The amount of charge acquired by each solid depends on factors such as the type of material, the surface area in contact, and the duration of contact. It is important to note that the law of conservation of charge always applies, meaning that the total charge before and after the contact remains the same. This phenomenon has various applications in technology, such as in the operation of batteries, electronics, and electrostatic precipitators.
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if you have a flashlight in a vacuum, would you see the beam of light from the flashlight?
If you have a flashlight in a vacuum, you would not be able to see the beam of light. This is because the vacuum is a space devoid of any matter, including air.
The beam of light requires a medium to travel through, and in the absence of a medium, it would not be visible to the human eye.
When a beam of light travels through air, it interacts with the air molecules, which scatter the light in all directions. This is why we can see a beam of light in a dark room or a foggy day. However, in a vacuum, there are no air molecules to scatter the light.
It is important to note that while the beam of light would not be visible, it would still exist. This is because light is a form of electromagnetic radiation and does not require a medium to travel through.
In summary, if you have a flashlight in a vacuum, you would not be able to see the beam of light, but it would still exist as electromagnetic radiation.
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two forces, one with a magnitude of 3 n and the other with a magnitude of 5 n, are applied to an object. for which orientation of the forces shown in the diagrams is the magnitude of the acceleration of the object the least?
The magnitude of the acceleration of the object will be the least when the forces are acting in opposite directions.
To find the orientation of forces that results in the least magnitude of acceleration, we need to calculate the net force acting on the object. The net force is the vector sum of the two forces applied to the object. We can use vector addition to find the net force.
If the two forces are acting in the same direction, then the net force is the sum of the magnitudes of the forces. In this case, the net force is 3N + 5N = 8N. Therefore, the magnitude of the acceleration of the object will be greater when the forces are acting in the same direction.
However, if the two forces are acting in opposite directions, then the net force is the difference between the magnitudes of the forces. In this case, the net force is 5N - 3N = 2N. Therefore, the magnitude of the acceleration of the object will be the least when the forces are acting in opposite directions.
However, the orientation of forces that results in the least magnitude of acceleration is when the forces are acting in opposite directions.
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who's your housekeeper and how do you live so good?you'se a super star, why you still up in tha hood?
I don't have a housekeeper or live in any particular location. I also don't have the ability to become a superstar or live in any particular neighborhood. However, I can suggest that success and living well come from hard work, determination, and making wise choices.
It's essential to set goals and work towards achieving them, be disciplined in managing finances, and surround oneself with positive influences. As for having a housekeeper, it's a personal choice that some people make to help manage their household. In summary, success and living well come from personal choices and effort, not just from external factors like having a housekeeper or living in a particular neighborhood.
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a vertical, frictionless piston-cylinder device contains a gas at 180 kpa absolute pressure. the atmospheric pressure outside is 100 kpa, and the piston area is 25 cm 2 . determine the mass of the piston.
If a vertical, frictionless piston-cylinder device contains gas at 180 kph absolute pressure. the atmospheric pressure outside is 100 kph, and the piston area is 25 cm², the mass of the piston is 204 kg.
Absolute pressure of the gas, P1 = 180 kPa
Atmospheric pressure, P2 = 100 kPa
Piston area, A = 25 cm²
To find: Mass of the piston
First, we need to determine the net force acting on the piston due to the pressure difference. This can be found using the formula: F = P₁A - P₂A
where, F = net force
P₁ = absolute pressure of gas
P₂ = atmospheric pressure
A = piston area
Substituting the values: F = (180 - 100) kPa × 25 cm² = 2000 N
Now, we can identify the mass of the piston using the formula: F = m × g
where, m = mass
g = acceleration due to gravity (9.81 m/s²)
Substituting the values: 2000 N = m × 9.81 m/s²m = 204 kg
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A 25,000 kg train car is moving at a velocity of 20 m/s when a hanging load of mass 10,000 kg is dropped upon it. Calculate the speed of the train car after receiving the load.
The final speed of the train car after receiving the load is 14.3 m/s.
Mass of the train car, M = 25000 kg
Mass of the load, m = 10000 kg
Initial speed of the train car before receiving the load, v = 20 m/s
According to the law of conservation of momentum, the momentum of the train car before and after receiving load will be the same.
P = P'
Mv = (M + m)v'
Therefore, the final speed of the train car after receiving the load,
v' = Mv/(M + m)
v' = 25000 x 20/(25000 + 10000)
v' = 5 x 10⁵/35 x 10³
v' = 14.3 m/s
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in 2006 pluto lost its designation as a planet. what else did it lose at the same time?
When Pluto was demoted from planet status in 2006, it was renowned as a "dwarf planet" due to the fact that it has not "cleared its neighboring region of other objects" and is generally not a planet according to the International Astronomical Union (IAU).
So Pluto lost its designation as a planet and was reclassified as a dwarf planet.
The International Astronomical Union (IAU) refers to a non-governmental organization with the only objective of innovation and advancements in the fields of astronomy, including promoting astronomical research, outreach, education, and development through global cooperation. It was discovered in 1919 and is based in Paris, France.
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You travel by car to Toronto, Canada from your house in Tampa, Florida for a vacation. Would you expect the altitude of Polaris to increase, decrease, or stay the same during your trip to Canada? Why?
During your car trip from Tampa, Florida to Toronto, Canada, you would expect the altitude of Polaris, also known as the North Star, to increase. This is because Polaris appears higher in the sky as you travel closer to the Earth's North Pole.
The altitude of Polaris is determined by the observer's latitude on Earth. Polaris is located nearly in line with Earth's axis of rotation, and its altitude corresponds to the observer's latitude. In this case, as you travel from Tampa, Florida to Toronto, Canada, you are moving northward, closer to Earth's North Pole. The latitude of Toronto is higher than that of Tampa.
As you move closer to the North Pole, the altitude of Polaris will gradually increase. When you are in Tampa, which is further south, Polaris will appear lower in the sky. However, as you travel to Toronto, which is further north, Polaris will appear higher in the sky.
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A very long thin wire produces a magnetic field of 0.0050 × 10-4 T at a distance of 3.0 mm.
from the central axis of the wire. What is the magnitude of the current in the wire? (μ0 = 4π ×
10-7 T · m/A)
A) 7.5 mA
B) 1.7 mA
C) 3300 mA
D) 24,000 mA
The magnitude of the current in the wire is 1.7 mA, which is option B.
The magnetic field produced by a long straight wire carrying current is given by the formula:
B = (μ0 / 2π) * (I / r)
where B is the magnetic field, I is the current in the wire, r is the distance from the wire, and μ0 is the permeability of free space.
In this problem, we are given B = 0.0050 × 10-4 T and r = 3.0 mm = 0.0030 m. Substituting these values into the formula, we get:
0.0050 × 10-4 T = (4π × 10-7 T · m/A / 2π) * (I / 0.0030 m)
Simplifying, we get:
I = (0.0050 × 10-4 T) * (0.0030 m) / (4π × 10-7 T · m/A) = 1.7 mA
Therefore, the magnitude of the current in the wire is 1.7 mA, which is option B.
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Which of the following is/are accurate formula(s) for angular momentum? A. H = Iω B. H = mk2ω. C. M = mv. D. both A and B
Option D is correct: both A and B are accurate formulas for angular momentum.
Angular momentum is the measure of an object's rotational motion. Option A, H = Iω, represents the formula for the angular momentum of a rigid body rotating about a fixed axis. Here, I is the moment of inertia, and ω is the angular velocity. Option B, H = mk2ω, represents the formula for the angular momentum of a point mass rotating about a fixed axis. Here, m is the mass, k is the distance of the mass from the axis of rotation, and ω is the angular velocity.
Option C, M = mv, represents the formula for linear momentum, which is not the same as angular momentum. Linear momentum is the measure of an object's motion in a straight line.
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an object has a mass of 5.93 g and a volume of 1.75 cm3. what is the density of the object? question 12 options: 4.18 g/cm3 7.68 g/cm3 3.39 g/cm3 0.295 g/cm3
The correct answer is option C, 3.39 g/cm3. This means that for every cubic centimeter of the object, there is a mass of 3.39 grams.
To find the density of an object, we need to divide its mass by its volume. In this case, the object has a mass of 5.93 g and a volume of 1.75 cm3. Therefore, the density of the object is:
Density = Mass / Volume
Density = 5.93 g / 1.75 cm3
Density = 3.39 g/cm3
Therefore, the correct answer is option C, 3.39 g/cm3. This means that for every cubic centimeter of the object, there is a mass of 3.39 grams. It's important to remember that density is a physical property of matter that relates an object's mass to its volume. It can be used to identify and distinguish between different materials.
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what are the distance between the candle and the lens for the two locations where a focused image is projected onto the wall?
To determine the distance between the candle and the lens for the two locations where a focused image is projected onto the wall, you would need to know the focal length of the lens being used. Once you know the focal length, you can use the formula 1/f = 1/di + 1/do, where f is the focal length, di is the distance between the lens and the image, and do is the distance between the lens and the object (in this case, the candle).
Assuming the lens is placed between the candle and the wall, there will be two locations where a focused image is projected onto the wall: one closer to the lens and one farther away. The distance between the candle and the lens for each location will depend on the focal length of the lens and the distance between the lens and the wall.
Without knowing these distances or the focal length of the lens, it is impossible to determine the specific distance between the candle and the lens for the two locations where a focused image is projected onto the wall.
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Please help me fill in the blanks. Thank you! <3
Answer: (9) chemical, (10) heat, (11) mechanical, (12) electrical, (13) electrical, (14) light
Explanation: As seen in the diagram, there is fuel being burned. This fuel is the gas, oil, or coal. These chemicals have chemical energy that will be converted into heat energy when burned, just like how you convert chemical energy from firewood into heat energy when you burn the firewood. The steam produced when the heat energy boils the water moves through the turbine, causing the turbine to spin, which in turn spins the generator because the generator is connected to the turbine. Mechanical energy is both the kinetic energy and potential energy of an object. Kinetic energy is the energy an object has when it is moving, so the rotating turbine and generator have kinetic energy and thus mechanical energy. Generators turn kinetic energy into electrical energy by having coils inside of it spin around and around in a magnetic field, producing an electromotive force (aka voltage) that produces current and thus electricity within the loop. Obviously, light bulbs convert electrical energy into light energy, and they illuminate the world around us.
Additional Note: Technically, the electrical energy turns into thermal energy inside of the light bulb filament, causing the light bulb filament to get so hot that the filament radiates visible light. Due to the light bulb filament being hot, the space inside of the light bulb consists of either a vacuum or inert gases. Regular air contains oxygen and thus will react with the hot metal filament of the light bulb, oxidizing the light bulb filament and thus making the light bulb filament brittle. The brittle light bulb filament will then break and cause the light bulb to no longer radiate light.
q2a: when the capacitor fully charges and saturates in voltage, do you expect the voltage across the capacitor to be the same as the battery voltage, less than the battery voltage, or greater than the battery voltage?
When the capacitor fully charges and saturates in voltage, we expect the voltage across the capacitor to be A. the same as the battery voltage.
Capacitor is an electric component that stores charge and electrical energy in an electric field, it is a passive component made up of two conductive plates separated by a dielectric material. When a battery is connected to a capacitor, the capacitor starts charging, and the voltage across the capacitor increases gradually until it reaches its maximum limit. When the capacitor becomes fully charged, the voltage across it is the same as the battery voltage.As the capacitor charges, it stores energy in an electric field and releases the stored energy as soon as the circuit is opened.
When the capacitor is fully charged, the electric field inside the capacitor becomes saturated and cannot store any more energy, and it is said to have reached its maximum limit. At this point, the voltage across the capacitor is the same as the battery voltage. The capacitance and the voltage across the capacitor depend on the dielectric material and the distance between the plates, respectively. Therefore, when the capacitor fully charges and saturates in voltage, we expect the voltage across the capacitor to be A. the same as the battery voltage.
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a chain lying on the ground is 10 m long and its mass is 70 kg. how much work (in j) is required to raise one end of the chain to a height of 6 m? (use 9.8 m/s2 for g.) j
The work required is calculated to be 4116 J.
To find the work required to raise one end of the chain to a height of 6m, we need to first calculate the potential energy of the chain at that height. The formula for potential energy is mass x gravity x height (PE = mgh).
So, the potential energy of the chain at a height of 6m would be:
PE = 70 kg x 9.8 m/s^2 x 6m = 4116 J
To raise one end of the chain to that height, we need to do work equal to the potential energy of the chain at that height. Therefore, the work required would be 4116 J.
In this problem, we are given the length and mass of a chain lying on the ground, and we are asked to find the work required to raise one end of the chain to a height of 6m. To solve the problem, we use the formula for potential energy, which is mass x gravity x height (PE = mgh). We plug in the given values to find the potential energy of the chain at a height of 6m. The work required to raise the chain to that height would be equal to the potential energy of the chain at that height. Therefore, the work required is calculated to be 4116 J. This problem demonstrates the relationship between work and potential energy, as work is required to change the potential energy of an object by moving it to a higher or lower position in a gravitational field.
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there will be sources of error in the measurements taken in the experiment, both before and after the collision. for your experimental procedure, will the uncertainty in the calculated value of the mass of cart b be affected more by the error in the measurements taken before the collision or by those taken after the collision, or will it be equally affected by both sets of measurements? justify your answer.
In your experiment involving the collision of cart A and cart B, the uncertainty in the calculated value of the mass of cart B will likely be affected by both the measurements taken before and after the collision. However, it's important to consider the specific sources of error in each set of measurements to determine which may have a greater impact on the uncertainty.
Errors before the collision may arise from inaccuracies in the initial positions, velocities, or masses of the carts. These errors can propagate through the calculations and affect the final mass of cart B.
Errors after the collision may result from imprecise measurements of the final positions or velocities of the carts. Such errors can also introduce uncertainty in the calculated mass of cart B.
To justify which set of measurements has a greater impact on the uncertainty, you would need to analyze the specific experimental setup, measuring instruments, and potential sources of error. If one set of measurements has inherently larger uncertainties or is more prone to errors, then that set would have a more significant impact on the uncertainty in the calculated mass of cart B.
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A sub marine is 40cm below seawater of density 1020kg/m3.If the atmospheric pressure at the place is 103,000pa,calculate the total pressure acting on the submarinea .
The total pressure acting on the submarine is approximately 106,993.6 Pa.
To calculate the total pressure acting on the submarine, we need to consider both the pressure due to the depth of the seawater and the atmospheric pressure.
The pressure due to the depth of the seawater can be calculated using the formula:
Pressure = density × gravity × depth
where density is the density of the seawater, gravity is the acceleration due to gravity, and depth is the depth of the submarine below the seawater.
Given:
Density of seawater = 1020 kg/m³
Depth of submarine below seawater = 40 cm = 0.4 m
Acceleration due to gravity = 9.8 m/s²
Pressure due to the depth of the seawater = 1020 kg/m³ × 9.8 m/s² × 0.4 m = 3993.6 Pa
Next, we need to consider the atmospheric pressure, which is given as 103,000 Pa.
To find the total pressure acting on the submarine, we need to add the pressure due to the depth of the seawater to the atmospheric pressure:
Total pressure = Atmospheric pressure + Pressure due to depth of seawaterTotal pressure = 103,000 Pa + 3,993.6 Pa
Therefore, the total pressure acting on the submarine is approximately 106,993.6 Pa.
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ms. sanborn wants to make a magnet with only a north pole and another magnet with only a south pole. she only has normal rectangular magnets with north poles on one of the long ends and south poles on the other long end. what should she do?
Ms. Sanborn can cut the rectangular magnet in half lengthwise, separating the north and south poles. Then, she can use each half to create a magnet with only one pole.
By doing this, she will have a magnet with only a north pole and another with only a south pole. It is important to note that when cutting the magnet, she should be careful not to demagnetize it or damage it in any way.
It is also important to keep in mind that the strength of the resulting magnets may be weaker than the original rectangular magnet due to the separation process.
In summary, Ms. Sanborn can cut her rectangular magnet in half lengthwise to create a magnet with only a north pole and another with only a south pole, as long as she takes care not to damage the magnet in the process.
This answer is approximately 106 words, but can be expanded upon if needed.
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a conductor of radius r, length and resistivity r has resistance r. it is melted down and formed into a new conductor, also cylindrical, with one fourth the length of the original conductor. the resistance of the new conductor is
The resistance of the new conductor will be one-sixteenth (4 times 4) of the original conductor's resistance. The resistance of a conductor is directly proportional to its length and resistivity, and inversely proportional to its cross-sectional area.
When the original conductor is melted down and formed into a new conductor with one fourth the length, its cross-sectional area increases four times.
Mathematically, we can represent this relationship as Rnew = (Roriginal x Aoriginal)/(Anew x Lnew) = (R x pi x r^2)/(pi x r^2 x L/4) = R/16. Thus, the resistance of the new conductor will be 1/16 of the original conductor's resistance.
A cylindrical conductor with radius r, length L, and resistivity ρ has resistance R. Using the formula R = ρ(L/A), where A is the cross-sectional area (A=πr^2), we can determine its resistance. When the conductor is melted and reshaped to have 1/4 the length, the new length is L/4. The volume of the original conductor is conserved, so the new cross-sectional area A' is four times larger. With A'=4πr^2 and the new length L'=L/4, we can calculate the new resistance R' using the same formula: R' = ρ(L'/A'). Therefore, R' = (ρ(L/4))/(4πr^2) = R/4.
The resistance of the new conductor is one fourth the resistance of the original conductor.
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During an experiment, Ellie records a measurement of 25,000 m. How would she write her measurement in scientific notation?
A.
2.5 question text :Two asteroids are 75,000 m apart. One has a mass of 8 kg and the other 10 kg. If the force of gravity between them is 1.14 N, what is the mass of the other asteroid? 102 m
B.
2.5 question text :Two asteroids are 75,000 m apart. One has a mass of 8 kg and the other 10 kg. If the force of gravity between them is 1.14 N, what is the mass of the other asteroid? 105 m
C.
2.5 question text :Two asteroids are 75,000 m apart. One has a mass of 8 kg and the other 10 kg. If the force of gravity between them is 1.14 N, what is the mass of the other asteroid? 103 m
D.
2.5 question text :Two asteroids are 75,000 m apart. One has a mass of 8 kg and the other 10 kg. If the force of gravity between them is 1.14 N, what is the mass of the other asteroid? 104 m
The mass of the second asteroid, is 12.14 x 10¹¹kg.
Mass of the first asteroid, m₁ = 8 x 10⁷ kg
Distance between the asteroids, r = 75 x 10³m
Gravitational force acting between the asteroids, F = 1.14 N
The gravitational force is defined as the force of attraction existing between any two bodies in the universe, that have mass. This force is due to the gravitational field which exists between them.
The expression for the gravitational force is given by,
F = Gm₁m₂/r²
Fr² = Gm₁m₂
Therefore, the mass of the second asteroid,
m₂ = Fr²/Gm₁
m₂ = 1.14 x (75 x 10³)²/(6.6 x 10⁻¹¹ x 8 x 10⁷)
m₂ = 6412.5 x 10⁶/52.8 x 10⁻⁴
m₂ = 12.14 x 10¹¹kg
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Your question was incomplete, but most probably your question would be:
Two asteroids are 75000 m apart one has a mass of 8 x 10^7 kg. If the force of gravity between them is 1.14 N, what is the mass of the second asteroid?
The car is released from rest at position A and accelerates due to gravity down the track to position B. mass of toy car = 0.040 kg vertical height between position A and position B = 90 cm gravitational field strength = 9.8 N/kg Calculate the maximum possible speed of the toy car when it reaches position B.
Answer:
Explanation:
Here's the answer.
To calculate the maximum possible speed of the toy car when it reaches position B, we can use the principle of conservation of energy, which states that the total energy of a closed system remains constant. In this case, the closed system is the toy car, and the initial potential energy at position A is converted into kinetic energy at position B.
The potential energy of the car at position A is given by:
PE_A = mgh
Where:
m is the mass of the car, which is 0.040 kg
g is the gravitational field strength, which is 9.8 N/kg
h is the vertical height between position A and position B, which is 90 cm or 0.9 m
PE_A = 0.040 kg x 9.8 N/kg x 0.9 m
PE_A = 0.3528 J
At position B, the potential energy of the car is zero, and all of the initial potential energy has been converted into kinetic energy. The kinetic energy of the car at position B is given by:
KE_B = 1/2 mv^2
Where:
v is the speed of the car at position B
We can set the potential energy at A equal to the kinetic energy at B and solve for v:
PE_A = KE_B
0.3528 J = 1/2 x 0.040 kg x v^2
v^2 = 8.82 m^2/s^2
Taking the square root of both sides, we get:
v = sqrt(8.82 m^2/s^2)
v = 2.97 m/s
Therefore, the maximum possible speed of the toy car when it reaches position B is approximately 2.97 m/s.
Why do a coin and a feather fall with different accelerations in the presence of air?
A coin and a feather fall with different accelerations in the presence of air due to the difference in their masses and the effect of air resistance.
The air resistance acts against the motion of objects falling through the air, and it depends on the shape, size, and velocity of the object.
In the case of a coin, it has a higher mass than a feather, which means it is less affected by air resistance and falls faster.
the other hand, the feather has a larger surface area and is more affected by air resistance, which slows it down as it falls.
This effect can be observed in a vacuum chamber where there is no air resistance, and both objects fall with the same acceleration.
Therefore, the presence of air resistance is the main reason why a coin and a feather fall with different accelerations.
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A 1,000 kg car sitting at a red light is hit from behind by a 1,200 kg car moving at 20 m/s. The two cars lock bumpers and continue to move forward. What is the velocity of the cars after the collision?
We can use the law of conservation of momentum to solve this problem:
The initial momentum of the system is:
p_i = m1 * v1 + m2 * v2
where m1 = 1000 kg, v1 = 0 m/s, m2 = 1200 kg, and v2 = 20 m/s
p_i = (1000 kg)(0 m/s) + (1200 kg)(20 m/s) = 24,000 kg·m/s
After the collision, the two cars move together with a common velocity, v_f. The final momentum of the system is:
p_f = (m1 + m2) * v_f
where m1 + m2 = 2200 kg (since the two cars are locked together)
By conservation of momentum, we have:
p_i = p_f
24,000 kg·m/s = (2200 kg) * v_f
v_f = 10.91 m/s
Therefore, the velocity of the cars after the collision is 10.91 m/s.
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If an identical spring were connected in parallel. What mass would need to be attached to produce an extension of 15cm ,
If an identical spring were connected in parallel with another spring, the spring constant of the combined system would increase.
This means that a larger mass would be required to produce the same amount of extension. To calculate the mass needed to produce an extension of 15cm, we would need to know the spring constant of the individual springs and the total spring constant of the combined system. Assuming that the individual springs have the same spring constant (k) and are connected in parallel, the total spring constant (k_total) can be calculated as:
k_total = k + k = 2k
Using Hooke's Law (F = -kx), we can calculate the force required to produce an extension of 15cm:
F = -k_totalx = -(2k)(0.15m) = -0.3kN
To find the mass required, we can use the formula:
F = ma
Where F is the force, m is the mass, and a is the acceleration due to gravity (9.81 m/s^2).
m = F/a = (-0.3kN) / (9.81 m/s^2) = -30.6 kg
Therefore, a mass of approximately 30.6 kg would be required to produce an extension of 15cm in a system consisting of two identical springs connected in parallel. identical of spring, including its number of turns, diameter, and wire size, would affect both its material and spring constant in the event of two similar springs with differing lengths. The spring constant of the longer spring would, nevertheless, be lower than the spring constant of the shorter spring if the two springs were composed of the same material and had the same geometry other than their length.
This is due to the fact that the relationship between the spring constant and spring length is inverse. In other words, a spring will extend more under the same force if it is longer.
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