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A person on earth notices a rocket approaching from the right at a speed of 0.71 c and another rocket approaching from the left at 0.67 c. What is the relative speed among the two rockets, as gauged by a passenger on one of them?
According to present theories of light, in some experiments light seems to be: 1)composed of particles which can neither be created nor destroyed. 2)a particle whose quantized energy depends on its velocity. 3)a wave that moves from one place to anot..
Suppose a hockey puck slides down a frictionless ramp with an acceleration of 4.00 m/s2. If the ramp has a length of 5.90 m, how long does it take the puck to reach the bottom
A 25.0-kg box is released from rest on a rough inclined plane tilted at an angle of 33.5e to the horizontal. Determine the force of kinetic friction acting on the box
An archer, about to shoot an arrow, is applying a force of +240 Nto a drawn bowstring. What is the displacement ofthe bow string
A ball of 1.0 kg mass is tied to the end of a 1m string spinning at a speed of 7 m/s. What angle with the vertical axis does the string make
An ocean liner leaves New York City and travels 13° north of east for 268 km. How far east and how far north has it gone? In other words, what are magnitudes of the components of the ship's displacement vector in the following directions.
Assume that a car can operates on either 100% gasoline or 100 % ethanol, with no discernable difference in performance. How far can the car travel along the same route on a full tank of ethanol
Two bars of identical mass are at 34 °C. One is made from glass and the other from another substance. What is the specific heat capacity of the other substance
two parallel wires are 7.4 cmapart and each carries a current of 13.2 a. if the currents are in the same direction find
A 2.23-m-long rod, as measured in its rest frame, speeds by you longitudinally at 6.11 × 107 m/s. By how many millimeters do you determine the rod has contracted
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
A 1660-kg car travels 2.6 km up an incline at constant velocity. What is the net work done on the car
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