PhysicsLAB: Heat Transfer and Thermometric Properties

PhysicsLAB

Worksheet
Heat Transfer and Thermometric Properties

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Your feet feel warmer when you step onto a rug from an adjacent tile floor because the rug

is usually warmer than the tile
has a lower conductivity coefficient than the tile
for the same mass has more internal energy than the tile
all of the above

Which of the following methods of heat transfer involves the actual physical movement of high temperature molecules to regions of lower temperature?

condensationconductionconvectionradiation

If one's hands are being warmed by holding them to one side of a flame, the dominate form of heat transfer is which of these processes?

conductionradiationconvectionvaporization

The higher the temperature of a black-body radiator, the

longer the wavelengths its radiates
shorter the wavelengths its radiates

When two objects are in thermal equilibrium,

they contain the same amount of heat
they have the same internal energy
they are at the same temperature
they are changing state

When a bimetallic bar made of brass and iron strips is heated, the band bends towards the iron strip. The reason for this is

iron gets hotter than brass
brass gets hotter than iron
brass expands more than iron during the same temperature change
iron expands more than brass during the same temperature change
none of the above

Compared to a giant iceberg, a hot cup of tea has

more internal energy and higher temperatures
higher temperature but less internal energy
a greater specific heat and more internal energy
none of the above

Heat flows from an object with a high

internal energy to an object with a lower internal energy
temperature to an object at a lower temperature
both of the above since the two phrases are equivalent

If 25 g of hot water are added to 35 g of cold water, the heat lost by the hot water is ___ the heat gained by the cold water.

(A) less than(B) equal to(C) greater than

The first law of thermodynamics is a restatement of the

Carnot cycle
conservation of energy
law of heat transfer
principle of entropy

As the Kelvin temperature of a body increases, the total internal energy of the body

increasesdecreasesremains the same

Temperature is proportional to the ____ in a substance.

average kinetic energy of molecular translational motion
average potential energy of molecular bonds
total kinetic energy of molecular motion
total potential energy of molecular bonds

If only the potential energy of the molecules in a body is increased, the absolute temperature of the substance

increasesdecreasesremains the same

Consider a piece of copper at 22 ºC. If its internal energy is directly proportional to its absolute temperature in Kelvin, what final temperature would be needed to have a new internal energy equal to three times its original value?

66 ºC339 ºC612 ºC885 ºC

A copper rod has one end of its ends placed in a bunsen burner's flame and the other end is embedded in an ice block. By what factor is the rate of heat flow changed when the rod length is tripled?

1/32/939

A copper rod has one end of its ends placed in a bunsen burner's flame and the other end is embedded in an ice block. By what factor is the rate of heat flow changed when the rod's radius is tripled?

1/32/939

If the absolute temperature of a spherical object were tripled, by what factor would the rate of radiated energy emitted from its surface be changed?

392781

If the inside and outside temperatures remain the same but the surface area of a window pane is doubled, then the amount of heat conducted through the window will

also doublebe quadrupledbe cut in halfnot be affected

Place equal masses of aluminum and copper the same distance from a fire. If aluminum has a higher specific heat than copper, the one to undergo the fastest increase in temperature will be the

aluminumcopper

Heat is added at a constant rate to a sample of pure substance that is initially a solid at temperature T_o. The temperature of the sample as a function of time is shown in the graph below.

From the graph, one can conclude that the

(A) heat of fusion and the heat of vaporization are equal
(B) melting point is T_o
(C) specific heat is greater for the liquid phase than for the solid phase
(D) specific heat of the solid increases linearly with the temperature
(E) substance sublimes directly from the solid phase to the vapor phase

Related Documents

Lab:	Labs - A Sample Heat Engine Labs - Newton's Law of Cooling and the Specific Heat of a Metal Specimen Labs - Radiation of a Metal Cylinder Labs - Specific Heat Labs - Thermal Conductivity Labs - Water Mixtures
Resource Lesson:	RL - Heat RL - Incandescent Solids and Radiation RL - Specific Heat RL - Thermal Expansion
Worksheet:	APP - Eskimo Pi APP - Superman APP - The Hare Dryer APP - The Snowball Fight CP - Change of Phase CP - Heat Transfer CP - Mixtures CP - Specific Heat and the Law of Heat Exchange CP - Thermal Expansion #1 CP - Thermal Expansion #2 CP - Thermodynamics NT - Cabin Temperatures NT - Conductivity NT - Convection NT - Expansion #1 NT - Expansion #2 NT - Heat Transfer NT - Latent Heat #1 NT - Latent Heat #2 NT - Light and Heat NT - Sparkler NT - The Coffee Cup NT - Thermal Energy #1 NT - Thermal Energy #2

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