Questions from College Physics

Q: Suppose you mix 4.0 mol of a monatomic ideal gas

Suppose you mix 4.0 mol of a monatomic ideal gas at 20.0°C and 3.0 mol of another monatomic ideal gas at 30.0°C. If the mixture is allowed to reach equilibrium, what is the final temperature of the mi...

Q: The coefficient of static friction between a brick and a wooden board

The coefficient of static friction between a brick and a wooden board is 0.40, and the coefficient of kinetic friction between the brick and board is 0.30. You place the brick on the board and slowly...

Q: Six wood stoves have total surface areas A and surface temperatures T

Six wood stoves have total surface areas A and surface temperatures T as given. Rank them in order of the power radiated, from greatest to least. Assume they all have the same emissivity. (a) A = 1.00...

Q: A balloon contains 160 L of nitrogen gas at 25°C

A balloon contains 160 L of nitrogen gas at 25°C and 1.0 atm. How much energy must be added to raise the temperature of the nitrogen to 45°C while allowing the balloon to expand at atmospheric pressur...

Q: An experiment to determine the specific heat of a gas (Chapter

An experiment to determine the specific heat of a gas (Chapter 14) makes use of a water manometer attached to a flask. Initially the two columns of water are even. Atmospheric pressure is 1.0 Ã...

Q: A sphere with a diameter of 80 cm is initially at a

A sphere with a diameter of 80 cm is initially at a temperature of 250°C. If the intensity of the radiation detected at a distance of 2.0 m from the sphere's center is 102 W/m2, what is the emissivity...

Q: Suppose you inhale 0.50 L of air initially at 20

Suppose you inhale 0.50 L of air initially at 20°C and 100 kPa pressure. While holding your breath, this air is warmed at constant pressure to 37°C. Treating the air as an ideal diatomic gas, how much...

Q: A person of surface area 1.80 m2 is lying out

A person of surface area 1.80 m2 is lying out in the sunlight to get a tan. If the intensity of the incident sunlight is 7.00 × 102 W/m2, at what rate must heat be lost by the person in order to maint...

Q: On a hot day, you are in a sealed, insulated

On a hot day, you are in a sealed, insulated room. The room contains a refrigerator, operated by an electric motor. The motor does work at the rate of 250 W when it is running. The refrigerator remove...

Q: An object moves in a circle. Is the total work done

An object moves in a circle. Is the total work done on the object by external forces necessarily zero? Explain.