thermal physics

Question 1

What is thermal energy?

Answer 1

Thermal energy is the total energy of all the particles in an object due to their motion and position.

Question 2

True or False: Heat is a measure of the temperature of an object.

Answer 2

False. Heat is the transfer of thermal energy between objects.

Question 3

Fill in the blank: The SI unit of temperature is _______.

Answer 3

Kelvin

Question 4

What is the process of heat transfer through direct contact called?

Answer 4

Conduction

Question 5

Which method of heat transfer involves the movement of fluids?

Answer 5

Convection

Question 6

What is the term for heat transfer through electromagnetic waves?

Answer 6

Radiation

Question 7

Multiple Choice: Which material is a good thermal insulator? A) Metal B) Wood C) Water D) Air

Answer 7

B) Wood

Question 8

What is specific heat capacity?

Answer 8

Specific heat capacity is the amount of heat required to raise the temperature of 1 kg of a substance by 1 degree Celsius.

Question 9

True or False: All substances have the same specific heat capacity.

Answer 9

False. Different substances have different specific heat capacities.

Question 10

Fill in the blank: The formula for calculating heat energy is Q = mcΔT, where Q is _______.

Answer 10

heat energy

Question 11

What does the symbol ‘m’ represent in the formula Q = mcΔT?

Answer 11

Mass of the substance

Question 12

What is latent heat?

Answer 12

Latent heat is the heat energy required to change the state of a substance without changing its temperature.

Question 13

Multiple Choice: What is the latent heat of fusion?

Answer 13

The heat required to convert a solid into a liquid at its melting point.

Question 14

True or False: Boiling and melting are both phase changes that require latent heat.

Answer 14

True

Question 15

What happens to the temperature of a substance during a phase change?

Answer 15

The temperature remains constant during a phase change.

Question 16

Fill in the blank: The process of a liquid turning into a gas is called _______.

Answer 16

Evaporation

Question 17

What is thermal equilibrium?

Answer 17

Thermal equilibrium is the state in which two objects in thermal contact no longer transfer heat between them.

Question 18

Multiple Choice: Which of the following has the highest thermal energy? A) Ice B) Water C) Steam

Answer 18

C) Steam

Question 19

What is the principle of conservation of energy in thermal physics?

Answer 19

Energy cannot be created or destroyed; it can only be transferred or transformed.

Question 20

True or False: Convection currents can occur in solids.

Answer 20

False. Convection currents occur in fluids (liquids and gases).

Question 21

Fill in the blank: The temperature at which a solid becomes a liquid is called its _______.

Answer 21

Melting point

Question 22

What is the relationship between temperature and kinetic energy?

Answer 22

As temperature increases, the average kinetic energy of the particles in a substance also increases.

Question 23

Multiple Choice: Which of the following is an example of conduction? A) Sun warming the Earth B) A metal spoon heating in a hot soup C) Wind blowing through trees

Answer 23

B) A metal spoon heating in a hot soup

Question 24

What is the term for the temperature at which a gas turns into a liquid?

Answer 24

Condensation point

Question 25

True or False: Insulators are materials that allow heat to pass through easily.

Answer 25

False. Insulators resist the flow of heat.