Physicts test practice

The Si unit for thermal energy and heat is the

• Calorie

• Joule

• Celorie

• Pascal

Who discovered the mechanical equivalent of heat?

• Francis Bacon

• Robert Boyle

• Count Rumford

• James Joule

Si Unit For Heat

• Calorie

• Joule

• J/g^c

• N/m

The specific heat capacity of a substance is "specific" because it is a property that is independent of

• temperature

• mass.

• volume.

• density

A process that does not gain or lose thermal energy to its surroundings is

• adiabatic

• isothermal.

• isobaric

• isochoric

When water vaporizes at its boiling point for a given pressure,

• it liberates thermal energy to its surroundings.

• it absorbs thermal energy from its surroundings.

• its absolute temperature falls.

• its absolute temperature rises.

he amount of heat that is absorbed per kilogram as a substance melts at its melting point is its

• latent heat of vaporization.

• latent heat of fusion.

• heat capacity.

• specific heat.

An adiabatic process is one in which

• no thermal energy is added to or removed from the system.

• no thermal energy is added, but thermal energy is removed from the system.

• the pressure remains constant.

• the temperature remains at absolute zero.

Which of the following results from conduction?

• warming yourself by a crackling fire

• a crayon melting as it sits in the hot sun

• heating of the atmosphere by the sun

• burning your hand on a hot pan

Which of the following is an example of convection?

• a crayon melting as it sits in the hot sun

• an ice cube melting as it touches a warm liquid

• burning your hand on a hot pan

• warm air rising above a warm lake on a hot summer day