During an isothermal process, 5.0 J of heat is removed from an ideal gas. How much work does the gas do during this process?
A) 5.0 J B) 10 J C) -5.0 J D) 2.0 J E) 0.00 J
C
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Rotational Kinetic Energy: A solid uniform ball of mass 1.0 kg and radius 1.0 cm starts from rest and rolls down a 1.0-m high ramp. There is enough friction on the ramp to prevent the ball from slipping as it rolls down.(a) What is the forward speed of the ball when it reaches the bottom of the ramp?(b) What would be the forward speed of the ball if there were no friction on the ramp?(c) Since the ball starts from the same height in both cases, why is the speed different?
What will be an ideal response?
An unfueled 1 000-kg experimental rocket sled on level frictionless rails is loaded with 50 kg of propellant. It exhausts the propellant in a 20-s "burn.". If the rocket, initially at rest, moves at 160 m/s after the burn, what impulse is experienced by the rocket sled?
a. 1.1 × 10^5 kg·m/s b. 1.6 × 10^5 kg·m/s c. 1.5 × 10^5 kg·m/s d. 1.9 × 10^5 kg·m/s
A 1 mF, a 2 mF, and a 3 mF capacitor are connected in series, the combination being connected across a 9 volt battery. (a) Which capacitor has the greates charge? (b) Which capacitor has the greatest voltage?
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The radioactivity due to Carbon-14 measured in a piece of a wooden casket from an ancient burial site was found to produce 20.0 counts per minute from a given sample,
whereas the same amount of carbon from a piece of living wood produced 160. counts per minute. The half-life of Carbon-14, a beta emitter, is 5730. years. Thus we would estimate the age of the artifact to be about A) 14,800 years B) 20,000 years C) 5,700 years D) 17,200 years E) 11,500 years