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The Earth has a mass of 5.97x10^24 kg and the Moon has a mass of 7.36x10^22 kg. The average distance between the center of the Earth and the center of the Moon is 3.84x10^8 m.
a) How far away would the Moon need to be for the magnitude of the gravitational force acting on it due to the Earth be the same as the magnitude of the gravitational force of a 72 kg student sitting at their desk on the surface of the earth?
b) A supermassive black hole passes through the edge of the solar system 1.20 x 10^13 m away. The gravitational force between an observant 79 kg astronomer and the black hole is 1N. What is the mass of the black hole?
A daring ranch hand sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. How long is he in the air
An electric dipole includes a charge of 4 ?C and a second charge. What is the total charge of the dipole
A child in a boat throws a 6.0 kg package out horizontally with a speed of 10m/s. Compute the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 29kg and that of the boat is 55.0 kg. Overlook water ..
A daring ranch hand sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The constant speed of the horse is 12.0 m/s, and the distance from the limb to the level of the saddle is 4.00 m.
Two wires are parallel and one is directly above the other. Each has a length of 50.0 m and a mass per unit length of 0.020 kg/m. However, the tension in the wire A is 6.20 102 N, and the tension in the wire B is 2.90 102 N.
A parallel plate capacitor has plates of area 2.0*10^3 and plate separation 1.0*10^4m. find the capacitance of this system if air fills the volume between the plates.
A 7 L rigid (constant volume) container holds 0.81 moles of helium at an initial temperature of 75 oC. How many moles of gas will be in the container at the final temperature
Imagine Bob lives on the earth at rest. Sara is traveling past the earth with a velocity of 9600 m/s, Suppose that a photon of light is passing Sara instead of a meteor. Bob measures the photon speed to be c, the speed of light. What speed does Sar..
The wheel of a car has a radius of .350 m. the engine of the car applies a torque of 295 Nxm to this wheel that does not slip against the road surface.
A proton, an electron, and an alpha particle (of charge +2e) form an equilateral triangle of side length 2.19×10-10 m. What is the electric potential energy of the three-particle system
A painter (mass = 55.7 kg) climbs 3.28 m up a 7.16 m long ladder leaning against a frictionless wall. The ladder has a mass of 16.2 kg, find Friction force between the ladder and the ground
A reflecting, spherical Christmas tree ornament has a diameter of 20 cm. A child looks at the ornament from a distance of 40 cm. define the image she sees. Where is the image locate.
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