Question 1

FIGURE 16-2 
-Consider a flat steel plate with a hole through its center as shown in Figure 16-2. When the plate's temperature is increased, the hole will

Accepted Answer

When the flat steel plate's temperature is increased, the hole will always expand because as temperature increases, the metal atoms vibrate more rapidly, leading to a larger atomic spacing which results in the expansion of the entire structure, including the hole.

Question 2

When you sit by a campfire, by what method of heat transfer are you primarily being warmed?

Accepted Answer

by radiation

Question 3

FIGURE 16-1 
-Refer to Figure 16-1. A bimetallic strip, consisting of metal G on the top and metal H on the bottom, is rigidly attached to a wall at the left. The coefficient of linear thermal expansion for metal G is greater than that of metal H. If the strip is uniformly heated, it will

Accepted Answer

The metal with the greater coefficient of linear thermal expansion will expand more than the other metal when heated. This will cause the bimetallic strip to curve downward, since the bottom metal H will experience more expansion than the top metal G.

Question 4

Describe the anomalous thermal expansion property of water and its significance.

Accepted Answer

The answer of Describe the anomalous thermal expansion property of...

Question 5

State the Zeroth Law of Thermodynamics.

Accepted Answer

The answer of State the Zeroth Law of Thermodynamics....

Question 6

What is the ratio of the pressure that a constant-volume gas thermometer registers at the boiling point of water to the pressure it registers at the freezing point?

Accepted Answer

The pressure of a gas is directly proportional to its temperature. The boiling point of water is 100 degrees Celsius, and the freezing point is 0 degrees Celsius. Therefore, the ratio of the pressure at the boiling point to the pressure at the freezing point is 100/0 = 1.37.

Question 7

Does it make sense to say that an object has twice as much heat as another?
 Why?

Accepted Answer

The answer of Does it make sense to say that...

Question 8

You are removing a pie from a 350°F oven, and while you need to protect your hands from the pie pan, the backs of your hands and your wrists and forearms are unprotected, yet they don't get burned. Why?

Accepted Answer

The answer of You are removing a pie from a...

Question 9

You are given a piece of pie straight out of the oven, so the crust and the filling are at the same temperature. You sample a piece of crust with no problem, but when you put a piece of filling in your mouth, you burn your tongue. Why?

Accepted Answer

The answer of You are given a piece of pie...

Question 10

Heat is energy that is transferred between objects that are in thermal contact because of a temperature difference.

Accepted Answer

This is the definition of heat as described by the laws of thermodynamics. Heat flows spontaneously from hotter objects to colder objects until thermal equilibrium is achieved.

Question 11

If a thermometer measures the temperature of two objects as being equal, you can conclude that if the objects are placed in thermal contact, no heat will flow between them.

Accepted Answer

If two objects have the same temperature, it means they are in thermal equilibrium, which indicates that no heat transfer will occur if they are put in contact with each other. This is because both objects have the same amount of thermal energy, so there will be no driving force for heat to flow from one object to another.

Question 12

When a bimetallic strip is cooled, the strip will bend toward the side

Accepted Answer

When a bimetallic strip is cooled, the side with the larger coefficient of linear expansion will contract more than the side with the smaller coefficient of linear expansion. This will cause the strip to bend toward the side with the larger coefficient of linear expansion.

Question 13

Radiative heat transfer requires a fluid to mediate the energy transfer.

Accepted Answer

Radiative heat transfer does not require a fluid to mediate the energy transfer. It can occur through vacuum or any transparent medium.

Question 14

By what method of heat transfer does a microwave oven transfer heat to the food being cooked?

Accepted Answer

The answer of By what method of heat transfer does...

Question 15

The amount of heat that flows through a rod whose ends are held at different temperatures is proportional to the length of the rod.

Accepted Answer

The amount of heat that flows through a rod is inversely proportional to the length of the rod, according to Fourier's law of heat conduction.

Question 16

When a bimetallic strip is heated, the strip will bend toward the side

Accepted Answer

When a bimetallic strip is heated, the metal with the larger coefficient of linear expansion expands more than the metal with the smaller coefficient, causing the strip to bend towards the side with the smaller coefficient of linear expansion.

Question 17

The amount of heat that flows through a rod whose ends are held at different temperatures is proportional to the area of the rod.

Accepted Answer

This statement is true as per Fourier's Law of Heat Conduction, which states that the rate of heat transfer through a material is proportional to the cross-sectional area through which the heat flows.

Question 18

Conductive heat transfer can only occur if solids mediate the energy transfer.

Accepted Answer

Conductive heat transfer can also occur in fluids (liquids and gases) through direct contact between molecules. It is not limited to solids.

Question 19

Convective heat transfer can only occur if fluids mediate the energy transfer.

Accepted Answer

Convective heat transfer occurs due to the movement of fluids, such as air or water, which allows the energy transfer from a hotter to a colder region. It does not occur in solids or vacuum, where conduction or radiation is the dominant mode of heat transfer.

Question 20

If a thermometer measures the temperature of two objects as being equal, you can conclude that the objects will be in thermal equilibrium if they are brought into thermal contact.

Accepted Answer

Thermal equilibrium means that the two objects have the same temperature and there is no net flow of heat between them when they are in thermal contact. Therefore, if a thermometer measures the temperature of two objects as being equal, it is an indication that they could be in thermal equilibrium if brought into contact.

Quiz 16: Temperature and Heat

FIGURE 16-2 -Consider a flat steel plate with a hole through its center as shown in Figure 16-2. When the plate's temperature is increased, the hole will