The new mass must be inserted and hung at a distance of 30 cm, per the calculation.
Is hung or hanged a word?The past tense of the verb hang, which means "to suspend or be suspended," is "to hold." When it implies "to kill someone by tying a rope attached from above and removing the supporting from beneath," the past tense of the verb to hang is "to hang someone."
From the diagram,
W₁(50-30) + W₃(x-50) = W₂(80-50)
were, W₁ = m₁g = 0.4×9.8 = 3.92 N ( Where m₁ = 0.4 kg and g = 9.8
W₂ = m₂g =0.6×9.8 = 5.88 N ( where m₂ = 0.6 kg)
W₃ = m₃g = 0.3×9.8 = 2.94 N ( where m₃ = 0.3 kg)
Therefore,
3.92(30) + 2.94(50-x) = 5.88(30)
117.6 + 147-2.94x = 176.4
2.94x+264.6 = 176.4
-2.94x = 176.4-264.6
2.94x = 88.2
x = -88.2/-2.94
x = 30 cm
Thus the third mass must be hung 30 cm
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julie carries an 8.0-kg suitcase as she walks 18 m along a horizontal walkway to her hotel room at a constant speed of 1.5 m/s. how much work does julie do in carrying her suitcase?
Work done by julie do in carrying her suitcase is W = 365.7J.
When an object is moved over a distance by an external force, at least a portion of that force must be applied in the direction of the displacement. This is known as work in physics.
The product of a force and its displacement in the direction of the force is what is known as the definition of work done.
We might thus conclude that the force that Julie applied was equal to the weight of her suitcase.
Thus, F = mg F = (8 x 9.81) F = 78.48N will be the result.
Now that we are aware, H = Lsine is used to calculate the overall height to which the luggage is raised.
H = 18sin15 H = 4.66m; the task completed is now indicated by W = F.d W = 78.48. (4.66)
W = 365.7J
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Complete question -
Julie carries an 8.0-kg suitcase as she walks 18 m along an inclined walkway to her hotel room at a constant speed of 1.5 m/s. The walkway is inclined 15 degrees above the horizontal. How much work does Julie do in carrying her suitcase?
The density of a 2-cubic meter block of mass of 1000 kg is a. 200 kg/m3. b. 1000 kg/m3. c. none of the above d. 500 kg/m
e. 100 kg/m3
The density of a 2-cubic meter block of mass of 1000 kg is 500 kg/[tex]m^{3}[/tex].
We use the word "density" to indicate how much space (or "volume") an object or substance occupies in relation to the amount of matter contained therein (its mass). Density can also be defined as the quantity of mass per unit of volume. A dense object is one that is both hefty and small. Density is a crucial concept because it allows us to predict which compounds will float and sink in liquids. The density of an object needs to be lower than the density of the liquid in order for it to float.
Density= [tex]\frac{Mass}{Volume}[/tex]
= [tex]\frac{1000 kg}{2 cubic meter}[/tex]
= 500 kg/[tex]m^{3}[/tex]
So, The density of a 2-cubic meter block of mass 1000 kg is 500 kg/[tex]m^{3}[/tex].
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the shortest path from point a to point b goes through a pond. to avoid the pond, you must walk straight 23 meters along one edge of the pond, then take a 90-degree turn, and again walk straight 57 meters along another edge of the pond to reach point b. if you could walk through the pond, what would be the distance from point a to point b? a. 24 m b. 80 m c. d.
If you could walk through the pond, the distance from point 'A' to point 'B' will be 61.4 meters using Pythagoras theorem.
What is the theory of the Pythagorean Theorem?
Pythagoras discovered that the square of the hypotenuse of a right-angled triangle, where one of the angles is 90 degrees, equals the sum of the squares of the other two sides: a2+b2=c2.
In layman's words, what is the Pythagorean theorem?
The Pythagorean Theorem states that the squares on the hypotenuse (the side across from the right angle) of a right triangle, or, in familiar algebraic notation, a2 + b2, are equal to the squares on the legs.
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which of the three objects experiences the greatest buoyant force. which of the three objects experiences the greatest buoyant force. object a. object b object c. all three objects have the same buoyant force.
Objects A, B, and C in Figure 13.16 have the same volume. Rank in order, from largest to smallest, the size of the buoyant forces F(A), F(B), and F(C) on A, B, C.
Which item has the strongest buoyancy?Aluminum suffers the highest buoyant force since it has the highest volume and the largest amount of water displaced.
What kind of force is buoyant, for instance?Here are a few real-world instances of the buoyant force.A ship floating in the ocean, a boat moving down a river, an iceberg floating in the water, a person wearing a life jacket floating in the water, a helium balloon ascending in the sky, etc.The density has a direct relationship with the buoyant force.
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a man wants to test a rope. he ties one end to a telephone pole and the other to a horse. the horse pulls as hard as it can, but is not strong enough to break the rope. the man replaces the telephone pole with a second horse of identical strength. assume the two horses pull in opposite directions as hard as they can. will the rope break? explain your answer.
The rope will not break. Even though the two horses are pulling in opposite directions, their strength is identical and therefore cancels out.
The rope is not subjected to any greater force than when only one horse was pulling. If the rope was not strong enough to withstand the force of one horse, it would have broken when the first horse pulled on it.
This shows that maybe the rope is stronger and perhaps it was actually able to withstand the force than the horses when it is single and when now they are combined to form a greater force.
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Which of the following best sums up current scientific thinking about the nature of dark energy?
(a) Most dark matter probably consists of weakly interacting particles of a type that we have not yet identified.
(b) Dark matter consists of 90% of neutrinos and 10% of WIMPs.
(c) There is no longer any doubt that dark matter is made mostly of WIMPs.
(d) Dark matter probably does not really exist, and rather indicates a fundamental problem in our understanding of gravity.
The correct answer is (e): Dark energy is a mysterious energy that is causing the accelerating expansion of the universe.
What is energy?Energy is the capacity to do work or produce heat. It exists in many forms, including kinetic energy (energy of motion), potential energy (stored energy of position), thermal energy (energy of heat), electrical energy, chemical energy, and nuclear energy. All forms of energy can be converted into one another, and can be used to power machines or to generate electricity. Energy is essential for powering the world's economies and for sustaining life on Earth.
Dark energy is believed to be a form of energy that is causing the universe to expand faster and faster. Scientists do not yet fully understand the nature of dark energy, but they have identified several potential candidates, including the cosmological constant and quintessence. Recent research suggests that dark energy may account for 68% of the universe's total energy content, making it the dominant form of energy in the cosmos.
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Find the EMF in the circuit using the Lorentz force law, showing the contribution of each piece of the circuit.
So, the total EMF in the circuit is given by the sum of the EMF induced in each segment of the circuit, which is E = ILB.L + IVB.L + E.q
What is Lorentz force law?The Lorentz force law states that when a charged particle moves through a magnetic field, the particle will experience a force equal to the product of its charge and the vector sum of the electric and magnetic fields.
The Lorentz force law states that the force on a moving charge in a magnetic field is given by F = q(v x B), where q is the charge, v is the velocity of the charge, and B is the magnetic field. To find the EMF (electromotive force) in a circuit using this law, we need to take into account the contribution of each piece of the circuit.
Consider a wire segment AB of length L carrying a current I. The force on the charges in this segment due to the magnetic field is given by F = ILB (where B is the magnetic field perpendicular to the wire segment). The work done on the charges as they move through this segment is given by W = F.L = ILB.L, which is equal to the EMF induced in this segment.
Consider a resistor R with a potential difference V across it. The force on the charges moving through the resistor is given by F = IVB, where I is the current through the resistor and V is the potential difference across it. The work done on the charges as they move through the resistor is given by W = IVB.L = IVB.L, which is equal to the EMF induced in this resistor.
Consider a battery or generator in the circuit with an EMF of E. The work done on the charges as they move through the battery or generator is given by W = E.q, where q is the charge that moves through the battery or generator.
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A body moving with a uniform acceleration had velocitie of 20m/ and 30m/ when paing the point P and Q of it path. Find the velocity midway between P and Q (in m/)
The velocity midway between P and Q is 25 m. Based on the direction of the displacement, the average velocity might either be positive or negative.
What is uniform acceleration?We say an object has uniform acceleration if its speed (velocity) is growing at a constant pace. Acceleration happens at a steady rate. A car's acceleration is not uniform if it accelerates quickly, then slows down, and then accelerates again.
What is velocity, exactly?In terms of time, an object or particle's movement is expressed vectorially as velocity. The recognized measurement of velocity magnitude is the meter per second (m/s) (also known as speed). A different way to indicate velocity is in centimeters per second (cm/s).
The velocity midway between P and Q can be found using the average velocity formula. Average velocity is given by:
Average velocity = (Initial velocity + Final velocity) / 2
In this case, the initial velocity is 20 m/s and the final velocity is 30 m/s. Therefore, the average velocity is:
Average velocity = (20 m/s + 30 m/s) / 2 = 25 m/s
So the velocity midway between P and Q is 25 m/s.
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two point charges each experience a 2.75 n electrostatic force when they are 1.99 cm apart. what force will each point charge experience when that separation is quadrupled? g
The force will be 0.171875 N . if separation is quadrupled.
Calculation-force F1 = 2.33 N.
separation, r2 = 1.99 cm = 0.0199 m.
by the equation, F = k * (q1 * q2) / r^2,
where k is Coulomb's constant, q1 and q2 are the charges, and r is the distance between them.
the force will be inversely proportional to 4^2 = 16 times less.
Therefore, the force experienced by each point charge when the separation is quadrupled will be
(2.75 n) / 16 = 0.171875 n.
The electrostatic force, where is it?Between two charges that are separated by a distance, there is an electrostatic force. The size of each charge and the separation between them determine the strength of the electrostatic force. Two charges that are either positive or negative when placed together repel one another.
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a sailor watches a ship with smokestack 30m above water level and the sailor's eye level is 4m above water level how far is the ship from shore when the sailor can't see it anymore
The ship is 26 meters from shore when the sailor can no longer see it.the sailor can't see it anymore.
What is the meters ?
Meters are a unit of length in the metric system, equal to 100 centimeters or approximately 39.37 inches. Meters are used to measure the length of objects, such as the height of a tree, the size of a room, or the width of a river. They are also used to measure distances between two points, such as the distance between two cities. Meters are a convenient way to measure the size of large objects, as well as the distance between them.
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in a series circuit, the voltage across any load is inversely proportional to the value of the resistance of that load.
When a current flows through a series circuit, it must pass through each load in turn.
What is current flows?Current flow is a fundamental physical phenomenon in which electric charge is transferred through a medium, such as a conductor or semiconductor. The flow of charge is usually referred to as an electric current, and is measured in amperes.
This means that the amount of current that passes through each load is the same. Since voltage is equal to current multiplied by resistance, the voltage across each load is inversely proportional to its resistance – as the resistance increases, the voltage across it decreases. This is because the same amount of current is split between the higher resistance load and the other loads in the series, meaning that the load with the higher resistance will have a smaller voltage drop across it.
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Find out the distance, traveled by the body from A to B
From the given picture we can calculate distance traveled by the body from A to B.
Formula of velocity=[tex]\frac{displacement }{time\\}[/tex]
Observe the x-axis
From the graph we say time taken by the body from A to B = 30-20 =10 sec
Observe y-axis velocity=40m/s
Displacement= velocity * time
D=40*10
D=400 meters
Distance means total path covered by the body.
Displacement means shortest path between starting and end point.
The distance traveled by the body from A to B is 400meters
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a ball is thrown vertically upward with a speed of 25.0 m/s from a height of 2.0 m. a. how long does it take to reach its highest point? b. how long does the ball take to hit the ground after it reaches its highest point?
To find the time it takes for the ball to reach its highest point, we can use the following kinematic equation: vf = vi + a*t= 2.02 seconds.
Calculation-where
vf = final velocity (0 m/s, since the ball, is at its highest point)
vi = initial velocity (25.0 m/s, upward)
a = acceleration (9.8 m/s^2, downward)
t = time
Substituting in the given values, we get: 0 = 25.0 + (-9.8)t
Solving for t, we get: t = 25.0 / -9.8 = 2.55 seconds
To find the time it takes for the ball to hit the ground after it reaches its highest point, we can again use the kinematic equation:x = vi*t + (1/2)at^2
where
x = distance fallen (2.0 m, the initial height)
vi = final velocity (0 m/s, since the ball is at its highest point)
a = acceleration (9.8 m/s^2, downward)
t = time
Substituting in the given values, we get:
2 = 0t + (1/2)(-9.8)*t^2
Solving for t, we get:
t = √(2/(-9.8)*(1/2)) = 2.02 seconds
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The gravitational force between two objects is inversely proportional to?
Answer:
is inversely proportional to the square of distance between the two objects
Now find the magnitude of the magnetic field that will cause the charge to travel in a straight line under the combined action of electric and magnetic fields. (Figure 2) Express the magnetic field Bbal that will just balance the applied electric field in terms of some or all of the variables q , v , and E . View Available Hint(s)
The magnetic filed Bbal that will just balance the applied electric field in terms of some or all of the variables q , v , and E is [tex]$B_{Bal} = \frac{E}{\text v}[/tex].
What is magnetic filed?Moving electric charge generates magnetic fields. A magnetic field can be produced when negatively charged electrons move in specific ways. These fields can be produced in wires or in the atoms of magnetic objects (electromagnetism).
Every magnetic field varies slightly. There are magnetic fields that are big, strong, small, and weak in different combinations. The Earth's magnetic field, for instance, is strong but large.
In magnetism, physical proximity—how near or far—really matters. The magnetic field of a magnet will be stronger the closer you are to it. The magnetic field of a magnet weakens as you move further away from it.
For charge to travel without any deflection force due to electrical field is equal to force due to magnetic field.
[tex]F_E =F_M\\Q_E =QvB\\[/tex]
Magnetic filed = [tex]$B_{Bal} = \frac{E}{\text v}[/tex]
Thus, The magnetic field Bbal that will just balance the applied electric field in terms of some or all of the variables q , v , and E is [tex]$B_{Bal} = \frac{E}{\text v}[/tex].
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a small motor runs a lift that raises a load of bricks weighing 916 n to a height of 12.2 m in 24.2 s .assuming that the bricks are lifted with constant speed, what is the minimum power the motor must produce?
It is referred to as moving at a constant speed when an object's speed remains constant and neither increases nor decreases.
An endless motion is what?A number that remains constant during motion is known as a constant of motion in mechanics, because it effectively places restrictions on motion. However, it is a mathematical limitation rather than a physical one, resulting naturally from the equations of motion (which would require extra constraint forces).
How quickly does night fall?Darkness moves at the same rate as light. More correctly, darkness is simply the absence of light and not a separate physical entity that exists on its own. whenever you partially or completely obstruct the light, such as by cupping your hands,
W=F×d
P=W/t
W= 816 N × 13.2 m=10771.2
P= 10771.2 J / 28.2 s
P=381.96 watts
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3,
what societal, ecological, or technical constraints should resource managers consider
before proposing solutions?
4. describe the design solution engineers and scientists developed to prevent
contamination of cleveland drinking water. why did their solution need to address bo
sub-problems equally?
5. propose two additional solutions to address the ecological phenomena causing the
water contamination in lake erie.
Resource managers should consider constraints such as cost, feasibility, public acceptance and potential impacts on the environment and human health. One solution is storage reservoirs to store and divert stormwater and sewage overflow away from Lake Erie.
Societal, ecological, and technical constraints that resource managers should consider before proposing solutions include factors such as cost, feasibility, public acceptance, and potential impacts on the environment and human health.
One design solution that engineers and scientists developed to prevent contamination of Cleveland's drinking water is the construction of a series of underground tunnels and storage reservoirs to store and divert stormwater and sewage overflow away from Lake Erie.
This solution needed to address both sub-problems equally because it addressed both the problem of sewage overflow and the problem of excessive stormwater runoff, which were contributing to the contamination of the lake.
Additional solutions that could be implemented to address the ecological phenomena causing water contamination in Lake Erie include:
Implementing a nutrient management plan that regulates the amount of fertilizers and other nutrients that can be applied to agricultural lands in the watershed, in order to reduce the amount of nutrient runoff that contributes to harmful algal blooms.Developing green infrastructure, such as rain gardens, green roofs, and permeable pavement, to reduce stormwater runoff and improve water quality.To learn more about Lake Erie visit: https://brainly.com/question/2640486
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q3. a mass of 10 kg is traveling with a velocity of 30 m/s in the positive y-axis. the mass undergoes a collision with another object of mass 40 g moving along the negative y-axis at a speed of 50 m/s. calculate the final velocity.
calculating the starting kinetic energy and contrasting it with the ending kinetic energy. A collision is elastic if indeed the kinetic energy was equal in both directions.
Are you referring to kinetic energy?Kinetic energy is a type of power that a thing or particle has because of its movement. Through being subjected to the a net force, an object transfers energy through work, accelerating and gaining kinetic energy in the process.
In everyday life, what is kinetic energy?Everything in the home that moves is a manifestation of kinetic energy. Examples of this include a cue things moving on a pool table, a glass breaking right on the floor after falling from the counter, or a fan air blowing on such a hot day. Both people moving about the house or electrical appliances that are on use kinetic energy.
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You kick a ball off the ground with a ma of 2. 1 kg. The ball leave your foot with a peed of 30 m/. Calculate the magnitude of the energy you identified in part a
Answer: 945 J
Explanation- You just need to plug in those values into the kinetic energy equation and you will find your answer. KE = 1/2mv^2 = 1/2•2.1 kg•(30 m/s)^2 = 945 J.
a cluster of atoms whose magnetic fields are aligned in the same direction is a . the end of a magnet where the force is the strongest is the . the region where a magnetic force is exerted is the . a substance that is easily magnetized is a
An arrangement of atoms with synchronized magnetic fields is referred to as a "Magnetic Domain."
What is a magnetic field, to put it simply?The magnetic field is the area in which a magnet produces its magnetic effects. We use the magnetic field as a tool to describe how the magnetic force is distributed in the vicinity and inside something magnetic in nature.
What generates a magnetic field?While opposite poles are drawn to one another, the same poles repel one another. When iron is rubbed against a magnet, the iron's atoms' north-seeking poles align in the same direction. The force generated by the aligned atoms creates a magnetic field.
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The total voltage dropped across a series-parallel circuit equals one-half of the supply voltage.a. Trueb. False
The total voltage dropped across a series-parallel circuit which equals one-half of the supply voltage is a true statement.
The total voltage drop in the series-parallel circuit corresponds to half the supply voltage. In the parallel part of a series-parallel circuit, the voltage across the branches can be found by multiplying the sum of the branch currents by the equivalent resistance of the resistors in the parallel part. If three resistors are placed in a parallel branch and powered by a 12-volt battery, the voltage drop across each of the three resistors will be 12 volts. The charge flowing through the circuit sees only one of these three resistors and therefore sees a single 12-volt drop.
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a 800 kg elevator starts from rest. it moves upward for 5.00 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. (a) what is the average power of the elevator motor during this period?
The average power will be 7103 Watt.
The quantity of energy moved or converted per unit of time is known as power in physics. The watt, or one joule per second, is the unit of power in the International System of Units. Power is also referred to as activity in ancient writings. A scalar quantity is power.
800 kg, t = 5 s, Vi = 0, Vf = 1.75 m/s.
V = Vi + a * t
a = V / t
a= 0.35
F = m * a
F = 800 * ( 9.81 + 0.35) = 8128 N
The distance the elevator travels in 5 seconds is D =a * t^2 / 2 =
0.35 * 5^2 / 2 = 4.37 m
P = F * D / t = 7103 W
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What is the thermal speed of hydrogen (H2) molecules at 800 K?
Please give your answer in km/s
The above statement states that at 800 K, hydrogen (H2) molecules have a thermal speed of 0.844 Km/s.
What is the straightforward meaning of speed?Its speed is the rate at which a object's position shifts in any direction. Speed is defined as the ratio of the distance traveled to the time required to cover that distance. Speed is a numeric value since it just has a path and no magnitude. The Pressure gauge scale of speed is defined in terms of duration and distance as its fundamental units. The SI unit describing speed is M/s, or meters a second.
V = sqrt(3RT/M)
V= sqrt(3*8.314* 800/28*10⁻³)
v=0.844 Km/s
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two students want to know the spring constant of a small spring. when a 70 gram mass is hung vertically from the spring the change in length is 3.08 cm. assuming this spring follows hooke's law, what is the spring constant of this spring?
The spring constant of this spring is -22,275 N/m.
Spring constant is a physical constant that describes the stiffness of a spring. It is used to calculate the force that is needed to extend or compress a spring by a given amount.
Hooke's law states that the force applied to a spring (F) is proportional to the displacement of the spring (x). The equation is:
F = -kx
where k is the spring constant.
To calculate the spring constant (k) of the spring, we need to rearrange the equation to isolate k:
k = -F/x
To solve for the spring constant, we need to know the force applied to the spring. Since we know that the mass hung from the spring is 70 g, we can calculate the force with the equation F = mg, where m is the mass of the object and g is the acceleration due to gravity.
F = 70 g * 9.81 m/s^2
F = 686.7 N
Now we can plug in the values for F and x into the equation k = -F/x to calculate the spring constant:
k = -686.7 N / 0.0308 m
k = -22,275 N/m
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how much work does scott do to push a 78 kg sofa 3.1 m across the floor at a constant speed? the coefficient of kinetic friction between the sofa and the floor is 0.23.
An object slide along a work piece when there is kinetic friction. The equation for sliding friction is F f= k FN, where k is the index of kinetic friction ” or “ FN is the object's normal force.
What is kinetic friction also referred to as?As it happens between two surfaces that are sliding through one another, sliding friction is sometimes referred to as kinetic friction. Kinetic friction develops as a result of surface interacting with one another.
Does speed affect kinetic friction?No, the kinetic friction coefficient is not affected by the relative speeds of the two surfaces. The types of contact between the surfaces are the sole factors that affect the coefficient of friction between them.
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A baseball bat hits a baseball and applies an external net force to the baseball. The initial momentum of the baseball is 5 kg·m/s, and the final momentum is -9 kg·m/s.
What is the change in momentum of the baseball?
The change in momentum of the baseball is -14 kg·m/s.
The change in momentum of an object can be calculated by subtracting the initial momentum from the final momentum.
Change in momentum = final momentum - initial momentum
Therefore, in this case:
Change in momentum = (-9 kg·m/s) - (5 kg·m/s) = -14 kg·m/s
The negative sign indicates that the final momentum is in the opposite direction of the initial momentum, which means the baseball has been reversed its direction.
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when a guitar string plays the note "A" the string vibrates at 440 Hz.
What is the period of vibration
Yes, that is accurate. The frequency of the note "A" that is used to set the guitar's other strings) is 440 Hz.
What does "corresponds" mean?to be comparable to, equal to, or match something: closely or directly relate to/with anything Their decrease in in-store sales is directly correlated with their rise in internet sales.
What are some sentences that use correspond?In some nations, the president and prime minister have the same responsibilities. horse joints that are comparable to human knees Each number represents a specific spot on the map. The timetable will be updated to reflect the academic calendar.
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The electric field of a plane EM wave is given by Ex = E0cos(kz+ωt),Ey=Ez=0.
Part A: Determine the direction of propagation. (x, y, z,-x,-y,or -z direction)
Part B: Determine the peak value of B⃗ . Express your answer in terms of the variables E0 and appropriate constants.
B0 = ____________
Part C: Determine the direction of B⃗ at location z = 0 and time t = 0. (x, y, z,-x,-y,or -z direction)
The direction of propagation is —z-direction, The peak value of [tex]B_0= \frac{E_0}{c}[/tex], the direction of B at location z = 0 and time t = 0 is along —y-axis.
What is electric field?An electrically charged particle or object creates an electric field, which is the area of space where an electric charge would experience force. Bring another charge into the electric field to observe the electric field, which is present everywhere in space. If the charges are separated enough from one another, the electric field can be practically approximated as zero.
Electric fields are a vector quantity that can be pictured as arrows pointing in the direction of or away from charges. The directions of the lines are either radially outward, away from a positive charge, or radially inward, toward a negative charge.
Part A:
If we write the argument of the cosine function as,
kz +ωt =k(z + ct)
we see that the wave is traveling the —z-direction.
Because E and B are perpendicular to each other and to the direction of propagation, and E is in the x-direction, B can have only y-component, with magnitude [tex]$ B_0= \frac{E_0}{c}[/tex]
Thus, the wave is traveling in the —z-direction.
Part B:
Since, [tex]E_0 = cB_0[/tex]
⇒ [tex]$ B_0= \frac{E_0}{c}[/tex]
Part C:
[tex]E_{x_0}[/tex], B and V must be perpendicular to each other, So, B must be along the y-axis. Also, V is in the x—z. So, B will along —y-axis.
Thus, The direction of propagation is —z-direction, The peak value of [tex]$ B_0= \frac{E_0}{c}[/tex], the direction of B⃗ at location z = 0 and time t = 0 is along —y-axis.
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If the mass of a satellite is doubled while the radius of its orbit remains constant, the speed of the satellite is increased by a factor of 2. reduced by a factor of 2. reduced by a factor of 8. increased by a factor of 8. not changed.
If the mass of a satellite is doubled whereas the radius of its orbit remains constant, the speed of the satellite is E: not changed.
Orbital speed is the speed required to obtain the balance between the inertia of the satellite's motion and gravity's pull on the satellite. This is estimated at 27,359-kilometer m per hour at an altitude of 242 kilometers. Without gravity, the inertia of the satellite would carry it off into space. If the mass of a satellite is doubled whereas the radius of its orbit is kept constant, then the speed of the satellite also remians constant.
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you see the light from a star that is 100,000 light years away. how long ago did the light leave the star?
The light left the star 100,000 years ago, if we are seeing a star which is 100,000 light years away.
There are different units to measure the length or distance, like: kilometers, meters are used to measure the distance of larger magnitude like length of the road, length of the cricket pitch. But astronomical distances are very large in length and they are measured by using a bigger unit, like: light year. A light year is a distance travelled by the light in a single year. it is equal to (3.0 × 10⁸ × 86400×365) ≈ 9.46 × 10¹⁵ meters. Hence we can say that light has left the star 100,000 years ago.
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