Physics Heat

Which of the following best describes the relationship between two systems in thermal equilibrium?

No net energy is exchanged.

If two small beakers of water, one at 70C and one at 80C, are emptied into a large beaker, what is the final temperature of the water?

The final temperature is between 70C and 80C.

A nail is driven into a board with an initial kinetic energy of 150 J. If the potential energy before and after the event is the same, what is the change in the internal energy of the board and nail

a. 150 J

. A substance registers a temperature change from 20C to 40C. To what incremental temperature change does this correspond?

a. 20 K

If there is no temperature difference between a substance and its surroundings, what has occurred on the microscopic level?

a. Energy was transferred from higher-energy particles to lower-energy particles.

The use of fiberglass insulation in the outer walls of a building is intended to minimize energy transfer through what process?

a. conduction

The use of fiberglass insulation in the outer walls of a building is intended to minimize heat transfer through what process?

a. conduction

Which of the following is true during a phase change?

b. Temperature remains constant

If energy is transferred from a table to a block of ice moving across the table, which of the following statements is true?

b. The ice is cooler than the table.

High temperature is related to

b. high kinetic energy

A substance's temperature increases as a direct result of

b. kinetic energy being added to the particles of the substance.

A calorimeter is used to determine the specific heat capacity of a test metal. If the specific heat capacity of water is known, what quantities must be measured?

b. metal mass, water mass, initial and final temperatures of metal and water

On a sunny day at the beach, the reason the sand gets hot and the water stays relatively cool is attributed to the difference in which property between water and sand?

b. specific heat

Which of the following is proportional to the kinetic energy of atoms and molecules?

b. temperature

Why does sandpaper get hot when it is rubbed against rusty metal?

c. Friction between the sandpaper and metal increases the temperature of both

Energy transfer as heat between two objects depends on which of the following?

c. The difference in temperature of the two objects

As the temperature of a substance increases, its volume tends to increase due to

c. thermal expansion.

Which of the following is a form of kinetic energy that occurs within a molecule when the bonds are stretched or bent?

c. vibrational

In the presence of friction, not all of the work done on a system appears as mechanical energy. What happens to the rest of the energy provided by work?

d. The remaining energy causes an increase in the internal energy of the system.

Which of the following describes a substance in which the temperature and pressure remain constant while the substance experiences an inward transfer of energy?

d. substance undergoing a change of state

Energy transferred as heat occurs between two bodies in thermal contact when they differ in which of the following properties?

d. temperature