Chapter 10: Thermal Physics

Question 1

Consider an amount of water freshly melted from snow in a pan and that the water has a temperature of 1°C. What will happen to the water as its temperature is increased to 3°C?
Select one:
a. Its volume will not change.
b. It will contract slightly (its volume will decrease).
c. Its mass will decrease.
d. It will expand slightly (its volume will increase).

Answer 1

b. It will contract slightly (its volume will decrease)

Question 2

For two objects with different sizes, masses, and temperature placed in thermal contact, energy travels from
Select one:
a. the object at higher temperature to the object at lower temperature
b. the object with more mass to the one with less mass
c. the larger object to the smaller object

Answer 2

a. the object at higher temperature to the object at lower temperature

Question 3

If an ideal gas A is thermally in contact with ideal gas B for a significant time, what can you say about TA versus TB?
Select one:
a. TA < TB
b. TA = TB 
c. TA > TB

Answer 3

TA=TB

Question 4

If a metal washer expands in response to heat, in which ways does the shape change?

Answer 4

Both the interior and exterior rings expand; the washer increases in diameter and becomes narrower.

Question 5

The pressure of a monoatomic ideal gas is doubled, while the volume is cut in half. By what factor is the internal energy of the gas multiplied?
Select one:
a. 1/4
b. 1/2
c. 4
d. 1

Answer 5

1

Question 6

Two spheres are made of the same metal and have the same radius, but one is hollow and the other is solid. The spheres are taken through the same temperature increase. Which sphere expands more?
Select one:
a. solid sphere
b. They expand by the same amount
c. not enough information to say
d. hollow sphere

Answer 6

They expand by the same amount.

Question 7

What happens to the pressure in a tightly sealed house when the electric furnace turns on and runs for a while?
Select one:
a. As Temperature increases, Pressure decreases
b. As Temperature decreases, Pressure decreases
c. As Temperature increases, Pressure increases

Answer 7

As Temperature increases, Pressure increases