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A ball is thrown horizontally from the roof of a building 47.0m tall and lands 21.3m from the base. What was the ball's initial speed?
A girl rides the escalator that moves foward at a constant speed. As the girl raises, how do her gravitational energy and kinetic energy change.
The equation of a transverse wave traveling along a very long string is y = 5.0 sin (0.055 ?x + 6.0 ?t), where x and y are expressed in centimeters and t is in seconds. Determine the amplitude of propagation of the wave.
Smoke particles in the air typically have masses of the order of 10^-16 kg. Find the root-mean-square speed of Brownian motion for a particle with a mass of 3.00 x 10^-16kg in air at 300K
Consider an ideal gas at 27 degree C and 1 atm. To get some idea how close these molecules are to each other, What is the length of an edge of each cube if adgacent cubes touch but not overlap
In order to pass a physical fitness test, Marcella must run 1000 m at an average speed of 3.90 m/s. How much time does she have to run the last 750 m
Do you think that the commonly held goal of maximizing shareholder wealth forms the basis of identity for our capitalist systems and organizations? Explain why or explain why not?
The edge of the thimble of a micrometer moves a distance of 2.0 mm when it is given four complete revolutions. Find the pitch of the micrometer. If the number of divisions on the circular scale is 50, calculate the least count of the micrometer. U..
A lottery machine uses blowing air to keep 2000 Ping-Pong balls bouncing around inside a 1.0m X 1.0m X1.0m box. What is the mean free path between collisions
The magnitude of the air resistance that opposes its downward motion is 258 N. Explain what is the magnitude of the acceleration of the rock?
Racing drivers like to warm up the tyres of their car as soon as possible. One reason is that warm tyres grip the road better but the temperature also affects the pressure of the air into he tyres.
A long, straight wire of length 1.3 m carries current I = 3.1 A. what is the magnitude of the force on the wire
A block of weight 36.1 N is hanging from a rope. The tension in the rope is 48.5 N, pulling upward on the block. find the magnitude and direction of the acceleration of the block
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