Questions from College Physics

Q: A freezer is used to freeze 1.0 L of water

A freezer is used to freeze 1.0 L of water completely into ice. The water and the freezer remain at a constant temperature of T = 0°C. Determine (a) The change in the entropy of the water and (b) The...

Q: What is the change in entropy of 1.00 kg of

What is the change in entropy of 1.00 kg of liquid water at 100.°C as it changes to steam at 100.°C?

Q: A 70.0-kg log falls from a height of

A 70.0-kg log falls from a height of 25.0 m into a lake. If the log, the lake, and the air are all at 300. K, find the change in entropy of the Universe during this process.

Q: A sealed container holding 0.500 kg of liquid nitrogen at

A sealed container holding 0.500 kg of liquid nitrogen at its boiling point of 77.3 K is placed in a large room at 21.0°C. Energy is transferred from the room to the nitrogen as the liquid nitrogen bo...

Q: The surface of the Sun is approximately at 5.70 x

The surface of the Sun is approximately at 5.70 x 103 K, and the temperature of the Earth’s surface is approximately 290. K. What entropy change occurs when 1.00 x 103 J of energy is transferred by he...

Q: When an aluminum bar is temporarily connected between a hot reservoir at

When an aluminum bar is temporarily connected between a hot reservoir at 725 K and a cold reservoir at 310 K, 2.50 kJ of energy is transferred by heat from the hot reservoir to the cold reservoir. In...

Q: Prepare a table for the following occurrence: You toss four coins

Prepare a table for the following occurrence: You toss four coins into the air simultaneously and record all the possible results of the toss in terms of the numbers of heads and tails that can result...

Q: A short circuit is a circuit containing a path of very low

A short circuit is a circuit containing a path of very low resistance in parallel with some other part of the circuit. Discuss the effect of a short circuit on the portion of the circuit it parallels....

Q: When a metal bar is temporarily connected between a hot reservoir at

When a metal bar is temporarily connected between a hot reservoir at Th and a cold reservoir at Tc, the energy transferred by heat from the hot reservoir to the cold reservoir is Qh. In this irreversi...

Q: On a typical day, a 65-kg man sleeps for

On a typical day, a 65-kg man sleeps for 8.0 h, does light chores for 3.0 h, walks slowly for 1.0 h, and jogs at moderate pace for 0.5 h. What is the change in his internal energy for all these activi...