Physical Science Review_L

Front

What is the rate at which energy is converted?

Back

Power; measured in watts.

Front

How reactive are alkali earth elements?

Back

Very reactive.

Front

What is the formula for calculating Gravitational Potential Energy (GPE)?

Back

GPE = mass (kg) × gravity (9.8 m/s²) × height (m).

Front

What is the GPE of a 0.2 kg apple that is 5 m above the reference level?

Back

9.8 J.

Front

How do you find the number of neutrons in an atom?

Back

Subtract the atomic number from the mass number.

Front

What is the total distance a swimmer covers in a 50 meter pool?

Back

50 meters.

Front

What is the displacement of a swimmer who swims from one end of a 50 meter pool to the other?

Back

0 meters.

Front

Define mechanical energy.

Back

The sum of potential and kinetic energy in an object.

Front

What is the difference between distance and displacement?

Back

Distance is the total path length, while displacement is the shortest path from start to end.

Front

What is the unit of power?

Back

Watt (W).