physical science final winter 24

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of all the particles in an object, which is related to its temperature.

Front

Which glass has more thermal energy if both are at the same temperature?

Back

The glass with more mass has more thermal energy.

Front

What is temperature?

Back

Temperature is a measure of the average kinetic energy of the particles in a substance.

Front

What is the formula for calculating efficiency?

Back

Efficiency = (Useful Energy Output / Total Energy Input) x 100%.

Front

If a washing machine uses 250J of electrical energy to produce 125J of useful energy, what is its efficiency?

Back

50%.

Front

What is the speed of an object that travels 60 meters in 4 seconds?

Back

15 m/s.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state, such as gravitational potential energy.

Front

What is the law of conservation of energy?

Back

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

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials.