Question 1

The amount of linear expansion of a rod does not depend on

Accepted Answer

A)  the original length of the rod. 
B)  the specific heat of the rod. 
C)  the change in the absolute temperature of the rod. 
D)  the coefficient of linear expansion. 
E)  the material from which the rod is made. 
A)  the original length of the rod. 
B)  the specific heat of the rod. 
C)  the change in the absolute temperature of the rod. 
D)  the coefficient of linear expansion. 
E)  the material from which the rod is made.

Question 2

The coefficient of linear expansion for most materials

Accepted Answer

A)  is much less than 1 K-1. 
B)  is much greater than 1 K-1. 
C)  is approximately 1 K-1. 
D)  can be less than, greater than, or about equal to 1 K-1. 
E)  is described by none of these. 
A)  is much less than 1 K-1. 
B)  is much greater than 1 K-1. 
C)  is approximately 1 K-1. 
D)  can be less than, greater than, or about equal to 1 K-1. 
E)  is described by none of these.

Question 3

A solid sphere at temperature T radiates energy at a rate of R J/s. If the radius of the sphere were doubled (its temperature remains at T), then the rate of radiating energy would go up by a factor of

Accepted Answer

A)  stays the same 
B)  2 
C)  4 
D)  8 
E)  16 
A)  stays the same 
B)  2 
C)  4 
D)  8 
E)  16

Question 4

Calculate the rate of heat transfer from a 1.5 m $\times$ 1.0 m window frame that is made of aluminum. The thickness of the frame is 1 mm and measures 3 cm from inside to outside. The inside room temperature is 25S1U1P1$\circ$S1S1P0C and outside temperature is 0S1U1P1$\circ$S1S1P0C.

Accepted Answer

A)  988 W 
B)  2964 W 
C)  1482 W 
D)  494 W 
E)  none of the above 
A)  988 W 
B)  2964 W 
C)  1482 W 
D)  494 W 
E)  none of the above

Question 5

The critical temperature of any gas is

Accepted Answer

A)  the temperature above which the gas cannot be liquefied. 
B)  the temperature at which solid, liquid, and gas coexist. 
C)  the temperature below which the gas cannot exist as a liquid. 
D)  the temperature at which the gas has a maximum volume. 
E)  374ºC. 
A)  the temperature above which the gas cannot be liquefied. 
B)  the temperature at which solid, liquid, and gas coexist. 
C)  the temperature below which the gas cannot exist as a liquid. 
D)  the temperature at which the gas has a maximum volume. 
E)  374ºC.

Question 6

Which of the following processes of heat transfer is independent of the area exposed?

Accepted Answer

A)  conduction 
B)  convection 
C)  radiation 
D)  All of these are independent of the area exposed. 
E)  None of these is independent of the area exposed. 
A)  conduction 
B)  convection 
C)  radiation 
D)  All of these are independent of the area exposed. 
E)  None of these is independent of the area exposed.

Question 7

If $\alpha$ is the coefficient of linear expansion of a material at 0ºC, the volume thermal-expansion coefficient of this material at 0ºC is

Accepted Answer

A)  ~ $\alpha$ 
B)  ~3$\alpha$ 
C)  ~$\alpha$3 
D)  ~$\alpha$1/3 
E)  None of these is correct. 
A)  ~ $\alpha$ 
B)  ~3$\alpha$ 
C)  ~$\alpha$3 
D)  ~$\alpha$1/3 
E)  None of these is correct.

Question 8

You are testing thermal conduction through a composite material made up of two layers, A and B. Layer A is twice as thick as layer B, and the thermal conductivity of material A is three times higher than that of material B. If the temperature on the outside surface of A is 80S1U1P1$\circ$S1S1P0C, and the temperature on the outside surface of B is 10S1U1P1$\circ$S1S1P0C, find the temperature at the interface of the two materials once a steady state of heat flow has been established.

Accepted Answer

A)  44S1U1P1$\circ$S1S1P0C 
B)  52S1U1P1$\circ$S1S1P0C 
C)  70S1U1P1$\circ$S1S1P0C 
D)  12S1U1P1$\circ$S1S1P0C 
E)  47S1U1P1$\circ$S1S1P0C 
A)  44S1U1P1$\circ$S1S1P0C 
B)  52S1U1P1$\circ$S1S1P0C 
C)  70S1U1P1$\circ$S1S1P0C 
D)  12S1U1P1$\circ$S1S1P0C 
E)  47S1U1P1$\circ$S1S1P0C

Question 9

A clock pendulum made of aluminum, which has a coefficient of linear expansion of 24 $\times$ 10-6/K, has a period of exactly 1 s at 20ºC. Before a homeowner leaves town for one week, he turns the thermostat down to 10ºC. When he returns, the clock is

Accepted Answer

A)  fast by about 73 s. 
B)  fast by about 7.6 min. 
C)  exactly on time. 
D)  slow by about 7.6 min. 
E)  slow by about 73 s. 
A)  fast by about 73 s. 
B)  fast by about 7.6 min. 
C)  exactly on time. 
D)  slow by about 7.6 min. 
E)  slow by about 73 s.

Question 10

A certain blackbody radiates 100 W at a temperature of 2000 K. How much power would this body radiate at 3000 K?

Accepted Answer

A)  150 W 
B)  225 W 
C)  338 W 
D)  506 W 
E)  759 W 
A)  150 W 
B)  225 W 
C)  338 W 
D)  506 W 
E)  759 W

Question 11

A thermo keeps a hot drink hot and a cold drink cold for a long time. Shown below is a cut-away section of a thermo with the important features labeled. The reason for the silvered double-wall vacuum chamber is

Accepted Answer

A)  the silvered surfaces reflect any radiation while the vacuum suppresses heat losses by convection and heat conductivity. 
B)  people like silvery thing so it is a marketing tool. The vacuum keeps the container clean. 
C)  the silvered surfaces suppresses heat conduction and convection and the vacuum prevents radiated heat. 
D)  because putting silvery surface is easy to manufacture, and while they are at it, might as well put a vacuum in between. 
E)  none of the above 
A)  the silvered surfaces reflect any radiation while the vacuum suppresses heat losses by convection and heat conductivity. 
B)  people like silvery thing so it is a marketing tool. The vacuum keeps the container clean. 
C)  the silvered surfaces suppresses heat conduction and convection and the vacuum prevents radiated heat. 
D)  because putting silvery surface is easy to manufacture, and while they are at it, might as well put a vacuum in between. 
E)  none of the above

Question 12

A well-known technique for achieving a very tight fit between two components is to "expand by heating and then cool to shrink fit." For example, an aluminum ring of inner radius 5.98 cm needs to be firmly bonded to a cylindrical shaft of radius 6.00 cm (Measurements are at 20S1U1P1$\circ$S1S1P0C). Calculate the minimum temperature to which the aluminum ring needs to be heated before it can be slipped over the shaft for fitting.
(Coefficient of linear expansion for Al = 24 $\times$ 10-6/K.)

Accepted Answer

A)  140S1U1P1$\circ$S1S1P0C 
B)  850S1U1P1$\circ$S1S1P0C 
C)  120S1U1P1$\circ$S1S1P0C 
D)  160S1U1P1$\circ$S1S1P0C 
E)  180S1U1P1$\circ$S1S1P0C 
A)  140S1U1P1$\circ$S1S1P0C 
B)  850S1U1P1$\circ$S1S1P0C 
C)  120S1U1P1$\circ$S1S1P0C 
D)  160S1U1P1$\circ$S1S1P0C 
E)  180S1U1P1$\circ$S1S1P0C

Question 13

Modern railway tracks consist of continuous welded-steel rails of 1.0-km lengths. If the coefficient of linear expansion of steel is 11 $\times$10-6 K-1, by how much would such a rail change in length between the highest summer temperature (40ºC) and the lowest winter temperature (-40ºC)?

Accepted Answer

A)  44 cm 
B)  88 cm 
C)  0.88 mm 
D)  1.8 mm 
E)  4.4 cm 
A)  44 cm 
B)  88 cm 
C)  0.88 mm 
D)  1.8 mm 
E)  4.4 cm

Question 14

You are trying to decide what the change in heat loss would be if you put a
100 cm $\times$ 150 cm and 5-mm thick glass window in an outside wall. The thickness of the wall is 15 cm. If the thermal conductivities of the glass and wall are 0.90 W/m·K and 0.15 W/m·K respectively, calculate the difference in heat loss through thermal conductivity with and without the window when the outside temperature is -10S1U1P1$\circ$S1S1P0C and the inside temperature is 15S1U1P1$\circ$S1S1P0C.

Accepted Answer

A)  1.34 $\times$ 103 J/s 
B)  6.7 $\times$ 103 J/s 
C)  5.53 $\times$ 103 J/s 
D)  6.75 $\times$ 103 J/s 
E)  none of the above 
A)  1.34 $\times$ 103 J/s 
B)  6.7 $\times$ 103 J/s 
C)  5.53 $\times$ 103 J/s 
D)  6.75 $\times$ 103 J/s 
E)  none of the above

Question 15

You have cut a hole in the middle of a large sheet of metal. When the sheet is heated, the area of the hole

Accepted Answer

A)  does not change. 
B)  always increases. 
C)  always decreases. 
D)  increases if the hole is not in the exact center of the sheet. 
E)  decreases only if the hole is in the exact center of the sheet. 
A)  does not change. 
B)  always increases. 
C)  always decreases. 
D)  increases if the hole is not in the exact center of the sheet. 
E)  decreases only if the hole is in the exact center of the sheet.

Question 16

If the thickness of a uniform wall is halved, the rate at which heat is conducted through the wall is

Accepted Answer

A)  doubled. 
B)  increased by a factor of four. 
C)  decreased by a factor of four. 
D)  cut in half. 
E)  unchanged. 
A)  doubled. 
B)  increased by a factor of four. 
C)  decreased by a factor of four. 
D)  cut in half. 
E)  unchanged.

Question 17

The pressure of a saturated vapor depends on the

Accepted Answer

A)  volume of the vapor. 
B)  mass of liquid vaporized. 
C)  density of the liquid only. 
D)  temperature only. 
E)  combined volume of liquid and vapor. 
A)  volume of the vapor. 
B)  mass of liquid vaporized. 
C)  density of the liquid only. 
D)  temperature only. 
E)  combined volume of liquid and vapor.

Question 18

The graph shows temperature as a function of thickness in three adjacent slabs of material of equal thickness. Assuming the heat transfer through the compound slabs is in a steady state, what can you say of these materials?

Accepted Answer

A)  material 1 is the best insulator 
B)  material 2 is the best insulator 
C)  material 3 is the best insulator 
D)  all are equally good insulators 
E)  It is impossible to determine which is the best insulator. 
A)  material 1 is the best insulator 
B)  material 2 is the best insulator 
C)  material 3 is the best insulator 
D)  all are equally good insulators 
E)  It is impossible to determine which is the best insulator.

Question 19

The coefficient of thermal expansion of water at 20ºC is 0.207 x 10-3 K-1 A thin glass tube contains a 75.0 cm column of water at 20ºC. If the thermal expansion of the glass tube is negligible, by how much does the length of the column of water expand when it is heated to 80ºC?

Accepted Answer

A)  3.1 mm 
B)  9.3 mm 
C)  12.4 mm 
D)  4.1 mm 
E)  28 mm 
A)  3.1 mm 
B)  9.3 mm 
C)  12.4 mm 
D)  4.1 mm 
E)  28 mm

Question 20

If the thickness of a uniform wall is doubled, the rate at which heat is conducted through the wall is

Accepted Answer

A)  doubled. 
B)  increased by a factor of four. 
C)  decreased by a factor of four. 
D)  cut in half. 
E)  unchanged. 
A)  doubled. 
B)  increased by a factor of four. 
C)  decreased by a factor of four. 
D)  cut in half. 
E)  unchanged.

The amount of linear expansion of a rod does not depend on

The coefficient of linear expansion for most materials

A solid sphere at temperature T radiates energy at a rate of R J/s. If the radius of the sphere were doubled (its temperature remains at T), then the rate of radiating energy would go up by a factor of

Calculate the rate of heat transfer from a 1.5 m $\times$ 1.0 m window frame that is made of aluminum. The thickness of the frame is 1 mm and measures 3 cm from inside to outside. The inside room temperature is 25^$\circ$C and outside temperature is 0^$\circ$C.

The critical temperature of any gas is

Which of the following processes of heat transfer is independent of the area exposed?

If $\alpha$ is the coefficient of linear expansion of a material at 0ºC, the volume thermal-expansion coefficient of this material at 0ºC is

A clock pendulum made of aluminum, which has a coefficient of linear expansion of 24 $\times$ 10^-6/K, has a period of exactly 1 s at 20ºC. Before a homeowner leaves town for one week, he turns the thermostat down to 10ºC. When he returns, the clock is

A certain blackbody radiates 100 W at a temperature of 2000 K. How much power would this body radiate at 3000 K?

A thermo keeps a hot drink hot and a cold drink cold for a long time. Shown below is a cut-away section of a thermo with the important features labeled. The reason for the silvered double-wall vacuum chamber is

Modern railway tracks consist of continuous welded-steel rails of 1.0-km lengths. If the coefficient of linear expansion of steel is 11 $\times$ 10^-6 K^-1, by how much would such a rail change in length between the highest summer temperature (40ºC) and the lowest winter temperature (-40ºC)?

You have cut a hole in the middle of a large sheet of metal. When the sheet is heated, the area of the hole

If the thickness of a uniform wall is halved, the rate at which heat is conducted through the wall is

The pressure of a saturated vapor depends on the

The graph shows temperature as a function of thickness in three adjacent slabs of material of equal thickness. Assuming the heat transfer through the compound slabs is in a steady state, what can you say of these materials?

The coefficient of thermal expansion of water at 20ºC is 0.207 x 10^-3 K^-1 A thin glass tube contains a 75.0 cm column of water at 20ºC. If the thermal expansion of the glass tube is negligible, by how much does the length of the column of water expand when it is heated to 80ºC?

If the thickness of a uniform wall is doubled, the rate at which heat is conducted through the wall is

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Exam 20: Thermal Properties and Processes

The amount of linear expansion of a rod does not depend on

The coefficient of linear expansion for most materials

A solid sphere at temperature T radiates energy at a rate of R J/s. If the radius of the sphere were doubled (its temperature remains at T), then the rate of radiating energy would go up by a factor of

Calculate the rate of heat transfer from a 1.5 m ×\times× 1.0 m window frame that is made of aluminum. The thickness of the frame is 1 mm and measures 3 cm from inside to outside. The inside room temperature is 25 ∘\circ∘ C and outside temperature is 0 ∘\circ∘ C.

The critical temperature of any gas is

Which of the following processes of heat transfer is independent of the area exposed?

If α\alphaα is the coefficient of linear expansion of a material at 0ºC, the volume thermal-expansion coefficient of this material at 0ºC is

A clock pendulum made of aluminum, which has a coefficient of linear expansion of 24 ×\times× 10-6/K, has a period of exactly 1 s at 20ºC. Before a homeowner leaves town for one week, he turns the thermostat down to 10ºC. When he returns, the clock is

A certain blackbody radiates 100 W at a temperature of 2000 K. How much power would this body radiate at 3000 K?

A thermo keeps a hot drink hot and a cold drink cold for a long time. Shown below is a cut-away section of a thermo with the important features labeled. The reason for the silvered double-wall vacuum chamber is

Modern railway tracks consist of continuous welded-steel rails of 1.0-km lengths. If the coefficient of linear expansion of steel is 11 ×\times× 10-6 K-1, by how much would such a rail change in length between the highest summer temperature (40ºC) and the lowest winter temperature (-40ºC)?

You have cut a hole in the middle of a large sheet of metal. When the sheet is heated, the area of the hole

If the thickness of a uniform wall is halved, the rate at which heat is conducted through the wall is

The pressure of a saturated vapor depends on the

The graph shows temperature as a function of thickness in three adjacent slabs of material of equal thickness. Assuming the heat transfer through the compound slabs is in a steady state, what can you say of these materials?

The coefficient of thermal expansion of water at 20ºC is 0.207 x 10-3 K-1 A thin glass tube contains a 75.0 cm column of water at 20ºC. If the thermal expansion of the glass tube is negligible, by how much does the length of the column of water expand when it is heated to 80ºC?

If the thickness of a uniform wall is doubled, the rate at which heat is conducted through the wall is

Systems of Measurement

Motion in One Dimension

Motion in Two and Three Dimensions

Newtons Laws

Applications of Newtons Laws

Work and Energy

Conservation of Energy

Systems of Particles and Conservation of Linear Momentum

Rotation

Conservation of Angular Momentum

Gravity

Static Equilibrium and Elasticity

Fluids

Oscillations

Wave Motion

Superposition and Standing Waves

Temperature and the Kinetic Theory of Gases

Heat and the First Law of Thermodynamics

The Second Law of Thermodynamics

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Calculate the rate of heat transfer from a 1.5 m $\times$ 1.0 m window frame that is made of aluminum. The thickness of the frame is 1 mm and measures 3 cm from inside to outside. The inside room temperature is 25^$\circ$C and outside temperature is 0^$\circ$C.

If $\alpha$ is the coefficient of linear expansion of a material at 0ºC, the volume thermal-expansion coefficient of this material at 0ºC is

A clock pendulum made of aluminum, which has a coefficient of linear expansion of 24 $\times$ 10^-6/K, has a period of exactly 1 s at 20ºC. Before a homeowner leaves town for one week, he turns the thermostat down to 10ºC. When he returns, the clock is

Modern railway tracks consist of continuous welded-steel rails of 1.0-km lengths. If the coefficient of linear expansion of steel is 11 $\times$ 10^-6 K^-1, by how much would such a rail change in length between the highest summer temperature (40ºC) and the lowest winter temperature (-40ºC)?

The coefficient of thermal expansion of water at 20ºC is 0.207 x 10^-3 K^-1 A thin glass tube contains a 75.0 cm column of water at 20ºC. If the thermal expansion of the glass tube is negligible, by how much does the length of the column of water expand when it is heated to 80ºC?