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Question: A railroad car of mass 2.52 x 104 kg is moving with a speed of3.95m/s. It collides and couples with three other coupled railroad cars, each of the same mass as the single car and moving in the same direction with an initial speed of1.98m/s.
(a) What is the speed of the four cars after the collision?
A beam of 800 keV gamma is mormally incident on a sheet of lead 12mm thick. the rate of energy transmission is 3x10^5 MeV s^-1. What fraction of the incident photon energy is absorbed in the sheet? How many photons per second are incident on the she..
Dry ice is frozen carbon dioxide. Suppose you have a piece of dry ice with a mass of 200 grams (a little less than half a pound) which you place into a large deflated bag, which you seal. What volume will the bag have expanded to
An aluminum wire carrying a current of 6.0 A has a cross-sectional area of 9.0 10-6 m2. Find the drift speed of the electrons in the wire
A very large number (N+1) polaroids are arranged in a sandwich.
two positive point charges q1 16x10-6 c and q2 4 x10-6 c are separated by a distance 3 m.calculate the distance d
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A 22.5 cm screwdriver is used to pry open a can of paint. If the axis of rotation is 2.29 cm from the end of the screwdriver blade and a force of 79 N is exerted at the end of the screwdriver’s handle, what force is applied to the lid? Answer in unit..
An electric wire that has a mass of 5 kg for a 20m length is strung between two poles 20 m apart. What should be the tension in the wire if it is to take 0.8 seconds for a pulse to travel along the wire from one pole to the other.
A ball having amass of 150 g strikes a wall with aspeed of 4.8 m/s and rebounds withonly 50% of its initial kinetic energy. What is the magnitude of the impulse on the wall from the ball
Derive the speed of the wave water in a shallow pool of water of depth y. You may consider using a method similar to the derivation of the sound wave equation
a 1.0 kg object is moving with a constant velocity 2.0 m/s toward the north. what is the second force that acts on the object
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