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assume four objects each of mass m are placed at the corners of a square os side length
a. How much work is needed to separate the planets so that they are infinitely away from each other?
A rod of length 30.0 cm has linear density (mass per length) given by: ?= 50.0 + 20.0x. What is the mass of the rod
An ideal transformer has 400 turns on its primary and 18 turns on its secondary. what is the power output
Air that initially occupies 0.47 m3 at a gauge pressure of 100 kPa is expanded isothermally to a pressure of 101.3 kPa, Compute the work done by the air
A 4-g bullet is fired into a 1.4-kg block that is resting on a table. After impact, What was the initial speed of the bullet?
A man leaps from the top of a 60 meter tall building. If his initial speed is 24 m/s and at an angle of 23 degrees above the horizontal, then with what speed does he hit the ground as he lands
A tank of water 3.00m deep sits on a table 1.00 m tall. A hole is located 2.0m from the bottom of the tank. Water flows out of hole and strikes the ground. Where does it strike the ground.
Five seconds later, the police officer leaves on her motorcycle, starts her stopwatch, and accelerates at 2 m/s^2 toward the car. According to her stopwatch, how many seconds until she catches the car
When she tightens the string slightly, she hears 6 beats/s. What is the frequency of string now.
The gravitational acceleration on the Moon is a sixth of that on Earth. The weight of an apple is 1.03 N on Earth. What is the mass of the apple
A piano tuner sounds two strings simultaneously. One has been previously tuned to vibrate at 287.0 Hz. The tuner hears 2.0 beats per second. What was the original frequency of the untuned string
A 2.00m -long, 550g rope pulls a 13.0kg block of ice across a horizontal, frictionless surface. The block accelerates at 2.20m/s2 . How much force pulls forward on (a) the ice, (b) the rope?
An electron and a proton are initially very far apart (effectively an infinite distance apart). They are then brought together to form a hydrogen atom, in which the electron orbits the proton at an average distance of 5.40 10-11 m. What is EPEfina..
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