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Amy (60kg) initial velocity of 7.5 m/s is skating towards bob (90kg) and initial velocity of 4 m/s. Bob is skating away from amy but since she is moving faster they collide. Assumeing the collision is totally inelastic what is their final speed? Assuming their collision is perfectly elastic what are each of their final speeds? And if bobs final speed is 5 m/s determine amys final speed and percent of kinetic energy lost in the collision.
Two atmospheric sound sources A and B emit isotropically at constant power. find the ratio of the larger power to the smaller power
The drive propeller of a ship starts from rest and accelerates at 3.10 x 10-3 rad/s2 for 2.60 x 103 s. Find the total angular displacement of the propeller
A helium-filled balloon contains n = 1.1 moles of helium atoms at room temperature and a pressure P = 2 ? Patm (twice atmospheric pressure). How many moles are in the balloon
A solenoid with 1200 turns per meter has a diameter of 9.00 cm. Find the magnitude of the magnetic flux through the loop
A simple pendulum has a length of 85 cm and a bob of mass 1.2 kg. When the string is at 20 degrees to the vertical. the bob has a speed of 3m/s. What is the maximum angle to the vertical
assume you are standing on a train, both feet together, facing a window. The front of the train is to your left. The train starts moving forward.
An engine with reservoir temperatures of 387 K and 725 K operates at half the efficiency of a Carnot engine. If the hot reservoir supplies the engine 4670 J of heat energy during each cycle, how much net work does the engine do in a cycle?
A long wire is known to have a radius greater than 5.2 mm and to carry a current that is uniformly distributed over its cross section, What is the radius (in mm) of the wire
A geologist finds that a Moon rock whose mass is 10.51 kg has an apparent mass of 6.28kg when submerged in water. What is the density of the rock
A 240-kg speedboat is negotiating a circular turn (radius = 36 m) around a buoy. During the turn, the engine causes a net tangential force of magnitude 590 N to be applied to the boat. The initial tangential speed of the boat going into the turn is 7..
A fighter jet lands on the deck of an aircraft carrier. it touches down with a speed of 70.4 m/, what is the speed of the jet 44.2 m before it's final stopping location
A sample of 2.3×1010 atoms that decay by alpha emission has a half-life of 150 min. How many alpha particles are emitted between t=30 min and t=160 min
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