Midterm Practice

Front

What is radiation?

Back

Radiation is the transfer of heat in the form of electromagnetic waves, such as infrared radiation, without the need for a medium.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials, where heat moves from the hotter object to the cooler one.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature and density.

Front

What is friction?

Back

Friction is the resistance that one surface or object encounters when moving over another, which generates heat.

Front

What is one advantage of using coal as an energy source?

Back

One advantage of using coal is that it is relatively cheap compared to other energy sources.

Front

How do simple machines help in force application?

Back

Simple machines help decrease the amount of force required to move an object, making tasks easier.

Front

What is the principle of energy conservation?

Back

The principle of energy conservation states that energy cannot be created or destroyed, only transformed from one form to another.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state, such as a rock at the top of a hill.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion, calculated as 1/2 mv², where m is mass and v is velocity.

Front

What is the difference between renewable and non-renewable energy sources?

Back

Renewable energy sources can be replenished naturally (like solar and wind), while non-renewable sources (like coal and oil) are finite.