Energy, Work and Power

Front

What is the energy-conversion chain that occurs when coal is burned to create steam in a power station?

Back

Chemical to thermal to mechanical to electrical.

Front

What type of energy conversion occurs when rubbing your hands together on a cold day?

Back

Mechanical energy into thermal energy.

Front

What is the energy called that is due to the splitting of atoms?

Back

Nuclear energy.

Front

What is a lever in the context of simple machines?

Back

A lever is a simple machine that consists of a rigid bar that pivots around a fixed point called the fulcrum.

Front

How is work calculated in physics?

Back

Work is calculated using the formula: Work = Force x Distance.

Front

If a weightlifter lifts two 300 newton weights 1.5 meters off the ground, how much work is done?

Back

900 Joules.

Front

What is the definition of energy in physics?

Back

Energy is the capacity to do work or produce change.

Front

What is the difference between kinetic energy and potential energy?

Back

Kinetic energy is the energy of motion, while potential energy is stored energy based on an object's position or state.

Front

What is the principle of conservation of energy?

Back

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

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of particles in a substance, related to its temperature.