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You drop a rock from rest from the top of a tall building. It takes 0.117 s for the rock to pass by a 2.10-m high window. How far from the top of the building is the top of the window? (Express your answer to three significant figures.)
Calculate the force of gravity on a 69.29-kg mass at the Earth's surface. The mass of the Earth is 6E24 kg, and the its radius is 6.4E6 m. ( 6E24 kg can also be written as 6 X 1024 kg.)
A meteoroid is speeding throughout the atmosphere, travelling east at 16.80 km/s while descending at 13.60 km/s. What is its speed in km/s.
A rope hangs from a cylinder over which it is wound, of radius 0.20 m and mass 40.0 kg, What torque does the hanging mass exert on the cylinder
An ideal spring of outstretched length 0.20 m is placed horizontally on a frictionless table as shown above. Calculate the maximum speed attained the 8 kg block
You throw a ball from the top of a 50 m high building at 12 m/s upward. The ball misses the building on the way down. The mass of the ball is 2 kg. What is the total work done by the force of gravity on the ball
You're having a hard time pushing a refrigerator across the kitchen floor. The force of your own push is 830 N. The refrigerator has a mass of 344 kg. The refrigerator moves with a constant velocity of 0.84 m/s for 4.7 s. What is the magnitude of ..
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.103 N, determine the positive charge in coulombs on the other
A hockey puck moving along the +x axis at 0.42 meter per second collides into another puck that is at rest. The pucks have identical mass. Obtain the speed and direction of the second puck after the collision
In a period of 0.9 second, 5 x 1023 nitrogen molecules strike a wall of area 7.4 cm2. determine the pressure exerted on the wall
A person riding in the back of a pickup truck traveling at 60km/h on a straight, What is the velocity of the ball relative to the driver
a woman can read the large print in a newspaper only when it is at a distance of57 cmor more from her eyes.a is she
An electromagnetic wave has an electric field given by E? (y,t)=[ 3.60×105V/m cos(ky?(1.250×1013rad/s )t)]k^. In which direction is the wave traveling
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