PS- Chapter 5

Radiation is the transfer of energy in the form of particles.

• True
• False

In a forced-air heating system, the warm air circulates by convection.

• True
• False

In an internal combustion engine, fuel burns outside the engine in chambers called cylinders.

• True
• False

Solar energy can be changed into thermal energy without any work being done.

• True
• False

Winds are examples of convection currents.

• True
• False

Lighter materials absorb more radiant energy than darker materials.

• True
• False

In a vacuum flask, the vacuum helps in reducing heat loss due to radiation.

• True
• False

When the same amount of thermal energy is added to both an object with high specific heat and an object with low specific heat, the object with a high specific heat will increase in temperature more than the object with a low specific heat.

• True
• False

One degree Celsius is the same as one Kelvin.

• True
• False

Refrigerators work because the heat flows spontaneously from warmer food to the colder air inside the refrigerator. The cooler air in the refrigerator occurs by the heat transferring to the coolant and taken out of the system.

• True
• False