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An ideal gas has its pressure cut in half slowly, while being kept in a container with rigid walls. In the process, 260 kJ of heat left the gas. What was the change in internal energy of the gas during this process? Please answer in KJ.
A current of 0.105 mA flows in a silver wire whose cross-sectional area is 0.930 mm2. Find the density of electrons in the wire, assuming that there is one conduction electron per silver atom
a tourist being chased by an angry bear is running in a straight line toward his car at a speed of 4.3 ms. the car is a
a lump of putty and a rubber ball have equal mass. both are thrown with equal speed against a wall. the putty sticks to
A player uses a hockey stick to increase the speed of a0.200kg hockey puck by 6 m/s in 2 seconds. How much did the hockey puck accelerate
Two trains on separate tracks move toward each other. Train 1 has a speed of 127 km/h; train 2 a speed of 80.0 km/h. What is the frequency heard by the engineer on train 1
When the emf for the primary of a transformer is of amplitude 7.10 V, the secondary emf is 85.2 V in amplitude. What is the transformer turns ratio
A 115 mCi radioactive tracer is made in a reactor. When delivered to a hospital 16 hours later its activity is 95 mCi. For how long (in hours) is the sample usable
A skier wears a goose down jacket of thickness 3.75cm and total surface area of 1.25m^2. determine the temperature at the surface of the skin
What is first order diffraction angle of light
A rifle with a mass of 1.76 kg fires a bullet with a mass of 5 g (0.005 kg). The bullet moves with a muzzle velocity of 401 m/s after the rifle is fired. what is the recoil velocity of the rifle
A point charge Q is located a the point (0,0), a second point charge with charge 2Q is located at the point (1,0); a third pointcharge with charge 3Q is located at the point (0,2).
A large turntable rotates about a fixed vertical axis, making one revolution in 5.00 s. What is the angular speed of the turntable when the child is 2.50 from the center, assuming that you can treat the child as a particle
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