Final Exam 2025

Front

What type of energy is stored in the bonds of a log before it is burned?

Back

Chemical energy is the energy stored in the bonds of chemical compounds, like the bonds in a log.

Front

Which example demonstrates radiation as heat transfer?

Back

Heat from the sun warming Earth is an example of radiation, where heat is transferred through electromagnetic waves.

Front

What type of energy does a stretched rubber band possess?

Back

A stretched rubber band possesses elastic potential energy, which is the energy stored when the band is stretched.

Front

If two forces act in the same direction, what is the net force?

Back

The net force is the total of both forces acting in the same direction.

Front

What happens to the wavelength detected by an observer when a source emitting waves moves away?

Back

The wavelength increases as the source moves away from the observer, a phenomenon known as redshift.

Front

Define 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 thermal energy?

Back

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

Front

Explain 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 the difference between potential energy and kinetic energy?

Back

Potential energy is stored energy based on position, while kinetic energy is energy of motion.

Front

What is the formula for calculating net force?

Back

Net force can be calculated using the formula: Net Force = F1 + F2 (if in the same direction) or Net Force = F1 - F2 (if in opposite directions).