Osmium has a density of 22.57 g/cm³, therefore 100.55 ml of space would be taken up by 1.50 kg with osmium.
Why is density important?The density of a place refers to the number of things there, which may include inhabitants, animal, trees, or artefacts. The density is calculated by dividing the number of objects by the breadth of the area. A country's population density is calculated by dividing the entire person by the area, expressed in square kilometres or miles.
The following formula can be used to determine density:
Density is calculated as mass divided by volume in litres.
Density = 22.57 g/cm³
Mass = 4.42 kg
In the equation, the value is replaced,
22.57 g/cm³ = 4.42 kg / volume
Volume = 22.75 g/cm³ × 4.42 kg
Volume = 100.55 ml
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a 500 kgkg horse can provide a steady output power of 750 ww (that is, 1 horsepower) when pulling a load. how about a 38 kgkg sled dog? data show that a 38 kgkg dog can pull a sled that requires a pulling force of 70 nn at a steady 2.4 m/sm/s.
this translates to a power output of 167 ww (70 nn x 2.4 m/sm/s). horse can provide a steady output power when pulling a load.
what is power ?
Power is the ability to influence people, events, or outcomes. It is an important concept in many fields, including politics, business, and psychology. Power is often seen as an abstract concept, but it can be described in terms of tangible resources such as money, authority, and control.
People often use power to achieve their goals and objectives, but it can also be used to limit the freedom and choices of others. Positive power is used to create or support something, while negative power is used to control or manipulate people or situations.
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an object travels with a velocity represented by the function . the objects initial velocity is 5 m/s and it starts at a position of 10 m. determine the final position of the object after 20 seconds. also, determine its initial acceleration and its final acceleration. (4843 m, -3m/s2, 77 m/s2)
The initial acceleration is negative that is -3 m/s² and the final acceleration of the object is 77m/s². The final position is 4843meters. Thus, the correct option is A.
What is Acceleration?Acceleration is the change in the initial velocity and final velocity of an object. Acceleration is a vector quantity because it has both the magnitude and direction. The SI unit of acceleration is meter per second square (m/s²).
Velocity (v) = 2t² - 3t + 5
Initial velocity = 5m/s
Initial Position = 10m
v = ds/ dt
Sf - Si = [tex]\int\limits^t_t{v} \, dt[/tex]
where, upper t = final time and lower t = initial time
Sf - Si = [tex]\int\limits^20_0 {(2t^{2} - 3t + 5)} dx[/tex]
Sf - Si = (2t³/3 - 3t²/ 2 +5t)²⁰₀
Sf - 10 = 4833.3meters
Sf = 4833.3 + 10
Sf = 4843.3 meters
Acceleration = dv/dt
Acceleration = d/ dt (2t² - 3t + 5)
Acceleration = 4t - 3
Initial acceleration (ai at t = 0sec) = 4(0) - 3 = -3 m/s²
Final acceleration (at at t = 20sec) = 4(20) - 3 = 80 - 3 = 77m/s²
Therefore, the correct option is A.
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hie can u help me solve this please
Write the following. as powers of 10, with one figure before the decimal point 0,000275
Answer:
Explanation:
2'75·10∧-4
Two 2.70 cm × 2.70 cm plates that form a parallel-plate capacitor are charged to ± 0.708 nC .Part AWhat is the electric field strength inside the capacitor if the spacing between the plates is 1.20 mm? E = ...?Part BWhat is potential difference across the capacitor if the spacing between the plates is 1.20 mm? V = ... ?Part CWhat is the electric field strength inside the capacitor if the spacing between the plates is 2.40 mm? E = ...?Part DWhat is the potential difference across the capacitor if the spacing between the plates is 240 mm?V = ...?
The electric field strength inside the capacitor does not depend on the distance between plates. Hence, Potential difference and Electric field strength is -130V and -1.09 x 10^5 V/m respectively.
What does "permittivity of open space" mean?The ability of electrical fields to pass through a conventional vacuum is represented by the physical constant known as the permittivity of free space. The constant has a relative standard uncertainty of 1.5 x 10-10 and is equal to around 8.854 x 10-12 F/m (farad per metre).
Q= charge => ± 0.708 nC
E => electric field strength = Q/Aεο
A=> area of plates 2.7 x 2.7 cm2.
εο = > 8.854 x 10-12 F/m.
E= -0.708 x10^-9/ (2.7x2.7 x 8.854 x 10^-4 x 10^-12)
= -1.09 x 10^5 V/m.
Potential difference = Ed => -1.09 x 10^5x 1.2x 10^-3 => -1.30x 10^2V
=> -130V.
How strong is the electric field?The intensity of an electric field at a specific location is expressed quantitatively as "electric field strength." The volt per metre (V/m or Vm-1) is the common unit.
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the length of the displacement vector represents how far an object is what?
The length of the displacement vector represents how far an object is traveled in one direction and is therefore denoted as option C.
What is a Displacement vector?This is used in geometry and mechanics and it helps to tell how much the position of an object has changed and also includes how far you have traveled and in which direction which may be eastwards, westward etc.
It talks about both a displacement and a direction of the object and is the reason why it is regarded as a vector quantity which is often measured in meters and the value depends on how far the object is . However, it doesn't signify visibility or how it is thrown but also depicts that it travels in one direction and is therefore the reason why option C was chosen as the most appropriate choice.
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The options are:
A) is visible
B) can be stretched
C) traveled in one direction
D) can be thrown
two point charges with 6.98x10-9 c and 6.44x10-9 c of charge are separated by a distance of 0.404 m. find the approximate electric force with which the two objects interact
The two items are located at a distance of 0.404 m, which results in an approximate electric force between them of 2.48 x 10-6 N for repelling two point charges with charges of 6.98 x 10-9 and 6.44 x 10-9 c.
How much of an electric force exists between two objects?
F= kq1 q2/r2 F= 9x10-9, 6.98x10-9, 6.44x10-9/0.404x2, and 2.48x10-6 N ( repulsive)
The electric force is the force that draws electrons and nuclei together. The results of experiments have demonstrated that the electrical force exerted on two objects is inversely proportional to their distance.The negative cube of the distance that separates two things determines the force between them.
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a 22 cm diameter bowling ball has a terminal speed of 77 m/s. Answer in kg.
The mass of a bowling ball whose diameter is 22 cm and has a terminal speed of 77 m/s is 6.62 kg.
What is terminal speed?The maximum speed (terminal velocity) that an object can reach while falling throughout a liquid. The speed wherein the drag force equivalent to the gravitational force is known as the terminal velocity. The object's mass, cross-sectional area, drag coefficient, the density of the fluid it is falling through, and gravitational acceleration will all affect its terminal velocity.
By using the equation of terminal speed-
Vt = √2mg/ρADc
77 = √2(9.8)m / (1.225) (π(0.11)∧2 (0.47)
m = 77∧2[(1.225)(π(0.11)∧2(0.47)] / 2(9.8)
m = 6.62 kg
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a 28-gram bullet strikes and becomes stuck in a 1.35 kg block of wood placed on a horizontal surface just in front of the gun. if the coefficient of friction between the wood and the surface is .28 and the impact drives the block a distance of 8.5 m before stopping, what was the speed of the bullet?
Inside an inelastic collision, a bullet that embeds into a block transfers its momentum to a bullet-block system. Using the principle of momentum conservation, we monitor the subsystems' speeds.
In physics, what is a momentum?As momentum depends on both velocity and the direction of a body's motion, it is quantified by "mass velocity". Since motion is a vector and mass is a scalar, force and motion. Mass times speed equals momentum.
Momentum examples, please?whenever you throw a ball at a person and it hits him in the face. It shows how challenging it would be to put a halt to the situation. In the air, a baseball is swooping. There is a big truck moving. a gun of this type shot a bullet.
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A 5.0 kilogram block accerlerating at 6.p meters per second along a rough horizontal force,f, of 50. newtons. What js the magnitude in newtons if the force of friction
About how much of the solar energy that reaches earth’s atmosphere is absorbed by the atmosphere?
"About three-fourth's of the solar energy that reaches earth’s atmosphere is absorbed by the atmosphere."
Solar energy is defined as the energy produced by the sun and is the major source of energy on earth. The ecosystem's plants benefit from it. The solar energy is absorbed by the atmosphere through compounds such as, water vapour, dust, ozone. These substances absorb about 71 percent of the solar energy which is approximately equivalent to three-fourths of it.
In total approximately 71% of incoming radiation is absorbed by the atmosphere and the Earth's surface while around 29% is reflected back to space and does not heat the surface.
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waves are observed passing under a dock. wave crests are 8.0 meters apart. the time for a complete wave to pass by is 4.0 seconds. the markings on the post submerged in water indicate that the water level fluctuates from a trough at 6.0 meters to a crest at 9.0 meters. what is the amplitude of the wave? 1.5 m 3.0 m 6.0 m 9.0 m
Given that the distance between the crest and the trough is 3 meters, the amplitude should be half of that, which is 1.5 meters.
What does a wave example of amplitude mean?Here are a few illustrations of amplitude:The distance between a wave's peak and the still water's surface is how large of a wave it is.The concentration of air molecules at the core of a compression and pulse of sound would determine the amplitude of the a sound wave.
What does a Class 11 wave's amplitude mean?The maximum displacement of a wave propagating medium particle from its mean location to its extreme position is the amplitude.
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a 1.8 kg book has been dropped from the top of the football stadium. its speed is 4.8 m/sec when it is 2.9 m above the ground. a. what is its total mechanical energy? b. how fast will it be moving when it hits the ground? c. how far above the ground was the book released from rest?
The mechanical energy of the book dropped from the top of the football stadium is 71.89 Joules.
What does it mean to be mechanical?adjective. A person is said to be mechanic if they have a natural aptitude for knowing how machines operate. He was a highly mechanical guy who had a deep understanding of sound. adverb mechanically [ADV -ed]
Given the data in the question;
Mass of the book; m=1.8kg
Speed; v=4.8/s
Height; h=2.9
Mechanical energy; Emcchanical =?
Mechanical energy is energy due to the position or movement of a particle or object. It is expressed as;
Emcchanical= Kinetic energy+ Potential energy
Emcchanical=[tex]\frac{1}{2}mv2[/tex] +mgh
Where m is mass of object, v is velocity, h is height and g is acceleration due to gravity { On earth, acceleration due to gravity }
We substitute our values into the equation
Emcchanical=[tex]\frac{1}{2}*1.8kg*(4.8m/s)2]+[1.8kg*9.8m82*2.9m][/tex]
Emcchanical=20.736kg.m2/82
Emcchanical=71.89.m2/82
Emcchanical=71.89.j
Therefore, the mechanical energy of the book dropped from the top of the football stadium is 71.89 Joules.
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A rocket following a parabolic path through the air suddenly explodes into many pieces. What can you say about the motion of this system of pieces?
Both before and after the explosion, the rocket's centre of mass will continue to move along its original parabolic trajectory. Regardless of whether the rocket's trajectory was parabolic or not.
A location established in relation to an object or set of objects is the centre of mass. It represents the system's average location as weighted by each component's mass. The center of mass for straightforward stiff objects with homogeneous density is found at the centroid.
The center of mass of the pieces will continue to move along the same parabolic direction that the rocket would have taken if it hadn't detonated, just as it did immediately before it did.
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an object has velocity relative to the ground. an observer moving past with a constant velocity relative to the ground measures the velocity of the object to be (relative to the observer). the magnitudes of these velocities are related by (a) (b) (c) (d) all the above are true. 17. (a) a boy sitting in a railroad car moving at constant vel
The right answer is (C). These velocities' magnitudes are connected by the formula v(2)v(o)+ v (1)
What is speed?The direction of a body or object's movement is defined by its velocity. Through its basic form, speed is just a scalar quantity. In essence, velocity is a vector quantity. It refers to the speed at which distance changes. It is the migration change rate.
Why is velocity a vector unit?Velocity is a vector quantity because it has alike magnitude and direction. Speed is a scalar quantity because it just has magnitude and no direction.Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt.
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the complete question is -
An object has velocity v(1) relative to the ground.An observer moving with a constant velocity v(o) relative to the ground measure the velocity of the object tov(2) be (relative to the observer). The magnitudes of these velocities are related by
(a) v(o)≤v(1)+v(2)
(b) v(1)≤v(2)+v(o)
(c) v(2)≤v(o)+v(1)
(d) All of the above are true
a gas, while expanding under isobaric conditions, does 480 j of work. the pressure of the gas is , and its initial volume is . what is the final volume of the gas? (4.5 x 10-3 m3)
The final volume of the gas is 4.5 x 10-3 m3.
What is final volume?Final volume is the measure of the volume of a substance or object after all changes to it have taken place. It is the measure of the amount of space taken up by an object or substance at a specific point in time.
We can use the work-energy theorem to solve this problem. Work (W) is equal to the change in energy (E). Since the expansion is isobaric, the change in internal energy is zero. Therefore, W = E = PΔV, where P is the pressure and ΔV is the change in volume.
We know that W = 480 J and P = ?. To solve for ΔV, we can rearrange the equation to ΔV = W/P. Plugging in the given values, we have ΔV = 480 J / P.
We also know the initial volume (V1) of the gas, so we can calculate the final volume (V2) by adding the change in volume to the initial volume: V2 = V1 + ΔV. Plugging in the given values, we have V2 = 4.5 x 10-3 m3 + (480 J / P).
Therefore, the final volume of the gas is 4.5 x 10-3 m3.
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ILL GIVE BRAINLIST FOR SHOWING WORK!!
The description of the motion and the gravitational potential energy of the particles are as follows;
26. (2) Energy
27. (4) Work
28. (3) Energy kg·m²/s²
29. (2) Joule
30. (4) a 6.0-kg mass 5.0 m above the floor
31. (3) Gravitational potential energy remain the same and speed decreases
32. (2) B
33. About 9.81 Joules
34. Option (1)
35. (4) The gain is the same along all paths
36. (2) Speed decreases and the gravitational potential energy increases
What is the gravitational potential energy?Gravitational potential energy is the energy a body posses due to its relative posirtion.
26. A scalar quantity is a quantity that has only magnitude but no direction.
The quantity that has only magnitude is energy.
The correct option is (2) Energy
27. Energy is the ability to do work, therefore, work has the same unit as energy. The correct option is therefore;
(4) Work
28. Energy = Force × Distance
Force = Mass × Acceleration
The unit of force is therefore; kg·m/s²
The unit of energy is therefore; m × kg·m/s² = kg·m²/s²
The correct option is; (3) Energy; kg·m²/s²29. Gravitational potential energy, is a form of energy due to elevation, therefore, the unit is the Joule
The correct option is; (2) Joule
30. Gravitational potential energy can be found using the formula;
P.E. = m·g·h
Where;
m = The mass
g = The acceleration due to gravity
h = The height
The greatest gravitational potential is therefore;
6.0 kg × 9.81 m/s² × 5.0 m
The correct option is therefore;
(4) a 6.0-kg mass 5.0 m above the floor31. The rough horizontal surface decreases the speed. The elevation of the horizontal surface is constant, therefore, the gravitational potential energy remains the same.
The correct option is therefore;
(3) Gravitational potential energy remains the same and speed decreases
32. The gravitational potential energy of the cart is least at the lowest point.
The correct option is; (2) B
33. The gravitational energy with respect to Earth is found as follows;
5.00 kg × 2.00 m × 9.81 ² = 98.1 Joules
34. The equation for the gravitational potential energy is; P.E. = m·g·h
Therefore, P.E. is directly proportional to the distance above the Earth and graph is a straight line passing through the origin
Option (1) is correct
35. The change in elevation is the same for all 5. The correct option therefore is option (4)
(4) The gain is the same along all paths.
36. The speed of the ball decreases when it is thrown upwards, while the gravitational potential energy increases as the height increases, therefore;
(2) Speed decreases and the gravitational potemntial energy increases
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Suppose you throw a football. At some instant, when the ball is in contact with your hand, your hand exerts a force of 600 N on the ball in the x direction. What is the force of the ball on your hand
The force of the ball on your hand is 600 N.
What is Newton's third law of motion?Newton's third law of motion states that, for every action force, there is an equal and opposite reaction force. That is action force and reaction force are equal in magnitude but opposite in direction.
Mathematically, the formula for Newton's third law of motion is given as;
Fa = - Fb
where;
Fa is the force exerted by AFb is the reaction of BIf your exert a certain amount of force on a ball, the ball will exert the same equal amount of force back to your hand but in opposite direction.
Thus, the force of the ball is equal to 600 N.
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A 7,500-W engine is used to lift an I-beam with a mass of 1,000 kg to a height of 150 m. How much work must be done to lift this mass at a constant speed? How long will it take?
Use these formulas: W = F x d F = m x 9.8 m/s² t = W/P
Answer:
Explanation:
The work that must be done to lift the mass is W = F x d = 1000 kg x 9.8 m/s2 x 150 m = 1,470,000 Joules (1.47 x 106 J).
The time it will take to lift the mass at a constant speed is t = W/P = 1.47 x 106 J/7500 W = 196 seconds (3 minutes 16 seconds).
Explanation:
Power = 7500 watts
mass = 1000kg
height/distance= 150m
work= ?
time = ?
second equation for motion
2nd law of newton
F = ma
for free fall motion a = g= 9.8
force = 9800Newton
now for work done
w = force into displacement
workdone = 1470000 Joules
now finally by power formula
p = workdone upon time
time = workdone upon power
time = 196 second
I hope this would help you!
is there a chest brace i can use because what can i use because it is to heavy to hold my cannon camera
There are several types of chest braces that can be used to support a heavy camera. The include a camera harness, camera chest mount and stabilizing rig
One option is a camera harness, which distributes the weight of the camera across the shoulders and upper chest. Another option is a camera chest mount, which attaches the camera directly to the chest using straps. A third option is a stabilizing rig, which attaches to the camera and uses counterweights to balance the camera and reduce the strain on the user's arms. It is important to use the chest brace that best fits your needs and also consult with a professional if you have any doubts.
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what do you think happens to the average speed as molecular weight increases (assuming the temperature stays the same)?
Generally, as molecular weight increases, the average speed of molecules will decrease. This is because heavier molecules, due to their greater mass, require more energy to move around and so they move more slowly than lighter molecules.
What is the molecules ?
Molecules are the smallest units of matter which have the properties of a particular substance. They are made up of two or more atoms held together by chemical bonds. Molecules can exist in different shapes and sizes, depending on the number and types of atoms they are composed of. They are essential building blocks of all matter, from the smallest to the largest. Molecules can be naturally occurring or created synthetically in a laboratory. Examples of molecules include water molecules, carbon dioxide molecules, proteins, and carbohydrates.
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If a wave traveling along a string bounces off an object and returns on the opposite side of the equilibrium, what type of boundary did the wave run into
The wave encountered a reflective boundary. A reflective boundary occurs when a wave reaches the end of a medium and then reverses its direction.
In this case, the wave started on one side of a string and, when it reached the object, it reversed direction and traveled back on the opposite side of the equilibrium.
Reflective boundaries usually occur when a wave reaches the end of a medium, but they can also be caused by an obstacle or an abrupt change in the medium's properties. In this case, the object acted as a barrier and reflected the wave, causing it to reverse direction.
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Two 2.10 cm × 2.10 cm plates that form a parallel-plate capacitor are charged to ± 0.708 nC .
Part A
What is the electric field strength inside the capacitor if the spacing between the plates is 1.30 mm ?
Part B
What is potential difference across the capacitor if the spacing between the plates is 1.30 mm ?
Part C
What is the electric field strength inside the capacitor if the spacing between the plates is 2.60 mm ?
Part D
What is the potential difference across the capacitor if the spacing between the plates is 2.60 mm ?
The electric field strength inside the capacitor does not depend on the distance between plates. Hence, Potential difference and Electric field strength is -234V and -1.8 x 10^5 V/m respectively.
What does "permittivity of open space" mean?The ability of electrical fields to pass through a conventional vacuum is represented by the physical constant known as the permittivity of free space. The constant has a relative standard uncertainty of 1.5 x 10-10 and is equal to around 8.854 x 10-12 F/m (farad per metre).
Q= charge => ± 0.708 nC
E => electric field strength = Q/Aεο
A=> area of plates 2.10x 2.10 cm2.
εο = > 8.854 x 10-12 F/m.
E= -0.708 x10^-9/ (2.1 x 2.1 x 8.854 x 10^-4 x 10^-12)
= -1.8 x 10^5 V/m.
Potential difference = Ed => -1.8 x 10^5 x 1.3 x 10^-3 => -2.34 x 10^2V
=> -234V.
How strong is the electric field?
The intensity of an electric field at a specific location is expressed quantitatively as "electric field strength." The volt per metre (V/m or Vm-1) is the common unit.
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a 0.20 kg yo-yo attached to a 0.60 m string is swung in a circle in the horizontal plane. find the tension in the string if the yo-yo has an angular velocity of 150 revolutions per minute.
According to the query, the strain in the string would be 29.60N if the yo-yo rotated at a rate of 150 minutes per revolution.
What does physics mean by tension?Physicist tension illustration
Why is there tension? Any physical thing that is in contact with another item can apply pressures to that item. Depending on the sorts of objects in touch, we label these friction coefficient differently. We refer to the tension as tension if a rope, thread, chain, or cable is one of the things applying the force.
M= 0.20kg
r= 0.60m
Angular velocity = 150rev/min
ω= 150rev/min[2π rad/1rev][1 min/60 sec]
ω= 15.70 rad/sec
As it revolve in a circle path, the centripetal force is equal to tension in string .
T = mω2r
= (0.20)(15.70)(0.60)
= 29.60N
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The acceleration due to gravity on the surface of Earth is g. Calling R the radius of Earth, at what distance from Earth's center would the acceleration due to gravity drop to g/16
At a distance of four times the radius of the earth the gravity drops to g/16.
Acceleration due to gravity means the acceleration obtained by an object due to the gravitational force. Value is found out to be 9.8m/s²
The equation for acceleration due to gravity, g = GM/R²
G is the Gravitational constant
M is the mass of earth
R is the radius of the earth.
When the acceleration due to gravity is g/16,
g/16 = GM/r², r is the distance from the earth.
Substituting the value of g,
GM/R²/16 = GM/r²
Cancelling GM on both sides
1/R² = 16/ r²
r² = 16× R²
r = √(16×R²)
= 4R
So the acceleration due to gravity falls to g/16 when the distance from the earth is four times its radius.
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If we try to detect extraterrestrial civilization with radio telescopes, which of the following do we NOT have to worry about?
a. Channel size
b. Time to detect
c. Polarization of radio waves
d. Power source of the telescope
e. Radio frequency
f. Direction in the sky
When trying to detect extraterrestrial civilizations with radio telescopes, we do not have to worry about the power source of the telescope. Thus option D is the correct answer.
When trying to detect extraterrestrial civilizations with radio telescopes, we do not have to worry about the power source of the telescope. The power source is used to operate the telescope and its various components, but it does not affect the ability to detect radio signals from extraterrestrial civilizations.
However, we have to worry about other factors such as channel size, time to detect, the polarization of radio waves, radio frequency, and direction in the sky. The channel size of the telescope is important as it determines the range of frequencies that can be detected. The time to detect refers to how long the telescope must observe in order to detect a signal.
Radiofrequency is also important as it determines the range of frequencies that can be detected. And the direction in the sky is important as the telescope must be pointed in the right direction to detect a signal.
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Five loops are formed of copper wire of the same gauge (cross-sectional area). Loops 1-4 are identical; Loop 5 has the same height as others but is longer. At the instant shown, all the loops are moving at the same speed in the directions indicated.There is a uniform magnetic field pointing out of the page in region I; in Region II there is no magnetic field. Ignore any interactions between the loops.A) For any loop that has an induced current, indicate the direction of the current.B) Rank the magnitude of the emfs around the loops. Explain your reasoning.C) Rank the magnitudes of the currents in the loops. Explain your reasoning.
E1=E4>E5>E2=E3 is the correct order of magnitudes induced in the loop. Region I has a magnetic field that is neither uniform nor steady and points out of the page. Disregard any communication between loops.
What in physics are magnitudes?In terms of physics, magnitude is just "distance or quantity." In terms of motion, it shows the absolute or relative size, direction, or movement of an object. It is used to describe something's size or scope .In physics, the term "magnitude" often refers to a size or amount.
What is an example of magnitude?The definition of magnitude is "how much of a quantity." The magnitude, for instance, can be utilized to explain the contrast between the speeds of a car and a bicycle.
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A woman wishes to move a basket of grapes 10 m. How many seconds will it take her if she uses 14 N of force and 2 W of power?
Answer:
Explanation:
Assuming that the woman is moving the basket of grapes at a constant speed, we can calculate the time it will take her by using the equation t = F/P, where t is the time in seconds, F is the force in newtons, and P is the power in watts. Plugging in the given values, we get t = 14/2 = 7 seconds. Therefore, it will take the woman 7 seconds to move the basket of grapes 10 m using 14 N of force and 2 W of power.
calculate the maximum centripetal acceleration that a test-tube sample held in the centrifuge arm 15.6 cm from the rotation axis must withstand.
15650 revs min & seconds = 260.833 revs a sec. If r = 15.7 mm, c=2(3.14)r ≈ 98.646 cm A rate of 0.98646 m/s. A max gravity force so a vial set as in centrifuge leg will life is eq(v2)/r = (0.986462)/0.157=6.19811 m/s2.
What does the centrifugation process entail?The process of centrifugation involves rapidly spinning molecules in solution around in an axle (in a centrifugal rotor) to separate them based on their densities. It is one of the more practical and widely used procedures in molecular biology labs.
Why do people use centrifuges?To sort fluids, gasses, or liquids depending on density, centrifuges are employed in a variety of laboratories. The purification of cells, organelles, viruses, proteins, and nucleic acids is a common task for centrifuges in both research and clinical facilities.
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a stroboscope is a light that flashes on and off at a constant rate. it can be used to illuminate a rotating object, and if the flashing rate is adjusted properly, the object can be made to appear stationary. (a) what is the shortest time between flashes of light that will make a three-bladed propeller appear stationary when it is rotating with an angular speed of 16.7 rev/s?
The shortest time between flashes of light that will make a three-bladed propeller is 0.02 sec
What is a stroboscope used for?A potent, swift-moving light source called a stroboscope is utilised for high-speed photography and the visual analysis of periodic motion. The stroboscope can be used to analyse things in rapid periodic motion by giving the appearance of paused or slowed motion.
revolution of the propeller
=> 1s/1.67 rev
T=> 0.059 s/rev
If all three blades of a three-bladed propeller are the same, the stroboscope can flash once every third revolution as follows:
T1/3 => 1/3 x 0.059
=> 0.02 sec.
What guiding principle governs the stroboscope?A device that periodically emits quick, powerful flashes of light is known as a stroboscope. When a fast-rotating object (like the cooling fan inside a computer) is illuminated by a stroboscope's flashing light, the object appears to be stationary.
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A golfer uses a club to hit a 45-g golf ball resting on an elevated tee, so that the golf ball leaves the tee at a horizontal speed of 38 m/s.
a.What is the impulse on the golf ball?
b. What is the average force that the club exerts on the golf ball if they are in contact for 2.0´103 s?
c. What average force does the golf ball exert on the club during this time interval?
The impulse of the golf ball is 1.7 kg.m/s. The average force that the club exerts on the golf ball is 855 N and the average force that the golf ball exerts on the club is -855 N.
What are the two terms that best sum up a force?A vector quantity is force. Its amplitude and the way it acts are two characteristics that might be used to characterize it.
The mass of the ball m = 45 g = 45 · 10⁻³ kg
Initial velocity V = 38 m/s
Contact time t = 2 · 10⁻³ s
The impulse is calculated according to the formula:
I = m · V = 45 · 10⁻³ · 38 = 1,710 · 10⁻³ = 1.71 kg m/s
I = 1.71 kg m/s
The average force is calculated according to the formula:
F = ΔI / Δt = 1.71 / (2 · 10⁻³) = 855 N
F = ΔI / Δt = 1.71 / (2 · 10⁻³) = 855 N
F = 855 N
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