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A 25 kg piston is above a gas in a long vertical cylinder. Now the piston is released from rest and accelerates up in the cylinder reaching the end 5 m higher at a velocity of 25 m/s. The gas pressure drops during the process so the average is 600 kPa with an outside atmosphere at 100 kPa. Neglect the change in gas kinetic and potential energy, and find the needed change in the gas volume.
A luge and its rider, with a total mass of 96 kg, emerge from a downhill track onto a horizontal straight track with an initial speed of 42 m/s. What magnitude F is required for the decelerating force
A jet aircraft flies over you in straight, level flight at a steady speed. The whine of the engine is audible to you. While the plane is approaching, you gauge the engine whine at 6596Hz. After it passes and is flying away from you, you gauge the whi..
The water flowing through a 1.8 centimeter (inside diameter) pipe flows out through three 1.4 centimeter pipes. If the flow rates in the three smaller pipes are 25, 17, and 11 L/min, determine what is the flow rate in the 1.8 centimeter pipe
Two trains, each having a speed of 22 km/h, are headed at each other on the same straight track. What is the total distance the bird travels
Pam, wearing a rocket pack, stands on frictionless ice. She has a mass of 45 kg. The rocket supplies a constant force for 22.0 m, and Pam acquires a speed of 62.0 m/s.
Derive an equation for radius r of circular path that the electrons follow in terms of the magnetic field B, the electrons’ velocity v, charge e, and mass m. You may assume that the electrons move at right angles to the magnetic field.
A bicycle and its rider together has a mass of 78 kg. What power output of the rider is required to maintain a constant speed of 5.0 m/s (about 11.2 mph) up a 5.0% grade
A highway curve has a radius of .58 km and is unbanked. A car weighing 36 kN goes around the curve at a speed of 36 m/s without slipping
A 14 g ball of clay travelling east at 3.0 m/s collides with a 30 g ball of clay travelling north at 2.00m/s. What are the speed and the direction of resulting 44 g ball of clay.
A 66.0 kg bungee jumper, tied to a 30.0 m long cord, leaps off a bridge whose deck is 60.0 m above the water. He falls to 8.0 m above the water before the bungee cord pulls him back up. What is the magnitude of the impulse exerted on the bungee jumpe..
A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. An 720-kg helicopter rises from rest to a speed of 8.5 m/s in a time of 4.0 s. Through this time it climbs t..
Lead has a greater density than iron, and both are denser than water. Is the buoyant force on each one the same? Explain
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