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In the old west, a marshal riding on a train traveling 50 m/s seesa duel between two men standing on the Earth 50 m apart parallel tothe train. The marshal's instruments indicate that in hisreference frame the two men fired simultaneously.
(a) Which of of the two men, the first one the train passes (A) orthe second one (B) should be arrested for firing the first shot? That is, in the gunfighter's frame of reference, who firedfirst?
(b) How much earlier did he fire?
(c) Who was struck first?
An eagle is flying horizontally at 5.7 m/s with a fish in its claws. It accidentally drops the fish. (a) How much time passes before the fish's speed doubles? (b) How much additional time would be required for the speed to double again?
A cord is used to vertically lower an initially stationary block of mass M at a constant downward acceleration of g/4. determine the work done by the cord's force on the block
A charging cell phone battery requires a current of 1.60 A and power is dissipated in the battery at 7.52 W. Determine the current drawn from the wall by the charger
A long wire carrying 140 A is perpendicular to the magnetic field lines of a uniform magnetic field of magnitude 6.5 mT. At what distance from the wire is the net magnetic field equal to zero
Two balls on a pool table collide. The balls have each a mass of 35grs and the collision can be considered elastic and in 1 dimension. If ball 1 is moving at 3 m/s to the right while ball 2 is moving at 1 m/s to the left, what are the final velocit..
A quarterback is asked to throw a football to a receiver that is 32.9 m away. What is the minimum speed that the football must have
A spherical source radiates sound uniformly in all directions. At a distance of 13 m, the sound intensity level is 80 dB. What power is radiated by this source
Two vehicles approach an intersection at right angles and collide. If vehicle 2 has a mass of 600 kg, vehicle 1 has a mass of 300 kg, and they were both traveling at 13 m/s before the collision, what is the magnitude and direction of the final veloci..
A horizontal wire of length 0.43 m, carrying a current of 6.9 A, is placed in a uniform external magnetic field. Determine the magnitude of the external magnetic field
You are testing a new amusement park roller coaster with an empty car with mass 123 kg. One part of the track is a vertical loop with radius 11.1 m, how much work is done by the friction
Two boats are heading away from shore. Boat 1 heads due north at aspeed of 3.2 m/s relative to theshore. Relative to boat 1, boat 2 is moving 30° north of east at a speed of 1.8 m/s.
You need to construct an RC circut with a time constant of .25s and you are given a selection of 1, 10, 100, and 1000Ohms resistors and a selection of 1, 10, 100, and 1000 micro Faradays Capacitors.
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