Question 1

Platinum melts at 3215°F. What is the corresponding temperature in the Kelvin scale?
A) 2041 K
B) 2135 K
C) 2207 K
D) 2296 K
E) 3215 K

Accepted Answer

To convert Fahrenheit to Kelvin, first convert Fahrenheit to Celsius by subtracting 32 and then multiplying by 5/9. After getting the Celsius temperature, add 273.15 to convert to Kelvin. For platinum melting point: $3215°F - 32 = 3183$, $3183 \times \frac{5}{9} \approx 1768.33°C$, $1768.33 + 273.15 \approx 2041.48K$.

Question 2

The thermal conductivity of concrete is 0.80 W/m-C° and the thermal conductivity of wood is 0.10 W/m-C°. How thick would a solid concrete wall have to be in order to have the same rate of flow through it as an 8.0 cm thick wall made of solid wood?
 (Assume both walls have the same surface area.)

Accepted Answer

The answer of The thermal conductivity of concrete is 0.80...

Question 3

Ten meter long steel railroad rails are laid end to end, with no space between, on a hot day when the temperature is 115.°F. Six months later the temperature has dropped to -2.°F. How much space now exists between each rail? [ linear expansion coef. for steel is 12. × 10^-6C°^-1]

Accepted Answer

The answer of Ten meter long steel railroad rails are...

Question 4

FIGURE 16-3 
-The process whereby heat flows in the absence of any medium is referred to as
A) conduction.
B) convection.
C) radiation.
D) inversion.
E) evaporation.

Accepted Answer

The process of transferring heat without the need for a medium is called radiation. Conduction and convection both rely on the presence of a physical medium to transfer heat, while inversion and evaporation do not relate to heat transfer without a medium.

Question 5

A wall consists of 2 layers of material:
 brick in front of an equal thickness of wood. If the respective thermal conductivities of the brick and wood are 1.3 J/m-s-C and 0.15 J/m-s-C, how does the temperature gradient across the wood compare to the gradient across the brick?

Accepted Answer

The answer of A wall consists of 2 layers of...

Question 6

The coefficient of linear expansion of lead is 29 × 10^-6 K^-1. What change in temperature will cause a 10-m long lead bar to change in length by 3.0 mm? A) 5.0 K B) 10 K C) 15 K D) 20 K E) 25 K

Accepted Answer

The answer of The coefficient of linear expansion of lead...

Question 7

The temperature in a room is 77°F. What is the corresponding temperature in the Celsius scale?
A) 81°C
B) 77°C
C) 43°C
D) 25°C
E) 18°C

Accepted Answer

To convert Fahrenheit to Celsius, use the formula: C = (F - 32) × 5/9. For 77°F, C = (77 - 32) × 5/9 = 25°C.

Question 8

The weather outside is frightful. The temperature is -22°F. What is the corresponding temperature in the Celsius scale?
A) -35°C
B) -30°C
C) -22°C
D) -20°C
E) -12°C

Accepted Answer

The answer of The weather outside is frightful. The temperature...

Question 9

0.45 kg of a metal at 90.°C is added to 0.40 kg of water at 20.0°C.
(a) If the final temperature of the mixture is 26.°C, what is the specific heat of the metal?
(b) If the water container has a significant heat capacity, will this increase or decrease the metal specific heat determined in part (a) given the same data?

Accepted Answer

The answer of 0.45 kg of a metal at 90.°C...

Question 10

A steel cable spanning a river is 200.000 m long when the temperature is 20.°C. What will be its length when the temperature drops to 0°C? (The coefficient of thermal expansion of steel is 12. × 10^-6K^-1.)

Accepted Answer

The answer of A steel cable spanning a river is...

Question 11

Gas in a constant-volume gas thermometer registers a pressure of 95.0 kPa at 100°C. Assuming ideal behavior, what is the temperature of this gas when the pressure is 190 kPa?
A) 546°C
B) 527°C
C) 491°C
D) 473°C
E) 200°C

Accepted Answer

The answer of Gas in a constant-volume gas thermometer registers...

Question 12

Gas in a constant-volume gas thermometer registers a pressure of 75.0 kPa at 0°C. Assuming ideal behavior, what is the pressure of this gas at 200°C?
A) 120 kPa
B) 130 kPa
C) 140 kPa
D) 150 kPa
E) 160 kPa

Accepted Answer

The answer of Gas in a constant-volume gas thermometer registers...

Question 13

In an electric furnace used for refining steel, the temperature is monitored by measuring the radiant power emitted through a small hole of area 0.50 cm². The furnace acts like a blackbody radiator. If it is to be maintained at a temperature of 1650°C, at what level should the power radiated through the hole be maintained?

Accepted Answer

The answer of In an electric furnace used for refining...

Question 14

At what rate is the human body radiating energy when it is at 33°C? Take the body surface area to be 1.4 m², and approximate the body as a black body.

Accepted Answer

The answer of At what rate is the human body...

Question 15

At what temperature are the numerical readings on the Fahrenheit and Celsius scales the same?

Accepted Answer

The answer of At what temperature are the numerical readings...

Question 16

A person tries to heat up her bath water by adding 5.0 L of water at 80°C to 60 L of water at 30°C. What is the final temperature of the water?

Accepted Answer

The answer of A person tries to heat up her...

Question 17

The coefficient of linear expansion of steel is 12 × 10^-6 K^-1. What is the change in length of a 25-m steel bridge span when it undergoes a temperature change of 40 K? A) 1.2 cm B) 1.4 cm C) 1.6 cm D) 1.8 cm E) 2.0 cm

Accepted Answer

The change in length (ΔL) can be calculated using the formula ΔL = αLΔT, where α is the coefficient of linear expansion, L is the original length, and ΔT is the temperature change. Substituting the given values: ΔL = (12 × 10^-6 K^-1)(25 m)(40 K) = 0.012 m = 1.2 cm.

Question 18

In grinding a steel knife blade (specific heat = 0.11 cal/g-C°), the metal can get as hot as 400.°C. If the blade has a mass of 80. g, what is the minimum amount of water needed at 20°C if the water is not to rise above the boiling point when the hot blade is quenched in it?

Accepted Answer

The answer of In grinding a steel knife blade (specific...

Question 19

Gallium boils at 2205°C. What is the corresponding temperature in the Fahrenheit scale?
A) 2205°F
B) 3805°F
C) 4001°F
D) 5223°F
E) 5548°F

Accepted Answer

To convert from Celsius to Fahrenheit, we use the formula:

°F = (°C x 1.8) + 32

Plugging in the given boiling point of gallium:

°F = (2205 x 1.8) + 32 = 3995°F

We round up to the nearest degree, giving the final answer of 4001°F. Therefore, the correct choice is C.

Question 20

Nitrogen boils at -196°C. What is the corresponding temperature in the Fahrenheit scale?
A) -315°F
B) -196°F
C) -346°F
D) -290°F
E) -321°F

Accepted Answer

To convert Celsius to Fahrenheit, we use the formula F = (9/5)C + 32. Therefore, we have F = (9/5)(-196) + 32 = -321°F.

Quiz 16: Temperature and Heat

Platinum melts at 3215°F. What is the corresponding temperature in the Kelvin scale?

The thermal conductivity of concrete is 0.80 W/m-C° and the thermal conductivity of wood is 0.10 W/m-C°. How thick would a solid concrete wall have to be in order to have the same rate of flow through it as an 8.0 cm thick wall made of solid wood? (Assume both walls have the same surface area.)

Ten meter long steel railroad rails are laid end to end, with no space between, on a hot day when the temperature is 115.°F. Six months later the temperature has dropped to -2.°F. How much space now exists between each rail? [ linear expansion coef. for steel is 12. × 10-6 C°-1]

FIGURE 16-3 -The process whereby heat flows in the absence of any medium is referred to as

A wall consists of 2 layers of material: brick in front of an equal thickness of wood. If the respective thermal conductivities of the brick and wood are 1.3 J/m-s-C and 0.15 J/m-s-C, how does the temperature gradient across the wood compare to the gradient across the brick?

The coefficient of linear expansion of lead is 29 × 10-6 K-1. What change in temperature will cause a 10-m long lead bar to change in length by 3.0 mm?

The temperature in a room is 77°F. What is the corresponding temperature in the Celsius scale?

The weather outside is frightful. The temperature is -22°F. What is the corresponding temperature in the Celsius scale?

A steel cable spanning a river is 200.000 m long when the temperature is 20.°C. What will be its length when the temperature drops to 0°C? (The coefficient of thermal expansion of steel is 12. × 10-6K-1.)

Gas in a constant-volume gas thermometer registers a pressure of 95.0 kPa at 100°C. Assuming ideal behavior, what is the temperature of this gas when the pressure is 190 kPa?

Gas in a constant-volume gas thermometer registers a pressure of 75.0 kPa at 0°C. Assuming ideal behavior, what is the pressure of this gas at 200°C?

At what rate is the human body radiating energy when it is at 33°C? Take the body surface area to be 1.4 m2, and approximate the body as a black body.

At what temperature are the numerical readings on the Fahrenheit and Celsius scales the same?

A person tries to heat up her bath water by adding 5.0 L of water at 80°C to 60 L of water at 30°C. What is the final temperature of the water?

The coefficient of linear expansion of steel is 12 × 10-6 K-1. What is the change in length of a 25-m steel bridge span when it undergoes a temperature change of 40 K?

In grinding a steel knife blade (specific heat = 0.11 cal/g-C°), the metal can get as hot as 400.°C. If the blade has a mass of 80. g, what is the minimum amount of water needed at 20°C if the water is not to rise above the boiling point when the hot blade is quenched in it?

Gallium boils at 2205°C. What is the corresponding temperature in the Fahrenheit scale?

Nitrogen boils at -196°C. What is the corresponding temperature in the Fahrenheit scale?

Ten meter long steel railroad rails are laid end to end, with no space between, on a hot day when the temperature is 115.°F. Six months later the temperature has dropped to -2.°F. How much space now exists between each rail? [ linear expansion coef. for steel is 12. × 10^-6C°^-1]

The coefficient of linear expansion of lead is 29 × 10^-6 K^-1. What change in temperature will cause a 10-m long lead bar to change in length by 3.0 mm?

A steel cable spanning a river is 200.000 m long when the temperature is 20.°C. What will be its length when the temperature drops to 0°C? (The coefficient of thermal expansion of steel is 12. × 10^-6K^-1.)

At what rate is the human body radiating energy when it is at 33°C? Take the body surface area to be 1.4 m², and approximate the body as a black body.

The coefficient of linear expansion of steel is 12 × 10^-6 K^-1. What is the change in length of a 25-m steel bridge span when it undergoes a temperature change of 40 K?