Forces Density Electricity Review

Front

What is the effect of using copper wires on resistance?

Back

Using copper wires will decrease resistance because copper is a good conductor.

Front

What two measurements make up density?

Back

Density is made up of mass and volume.

Front

What is the formula for kinetic energy?

Back

Kinetic energy (KE) = 0.5 * mass (m) * velocity (v)^2.

Front

What is the relationship between mass and kinetic energy?

Back

Kinetic energy increases with an increase in mass if velocity remains constant.

Front

What has the greatest kinetic energy?

Back

A car driving down a hill has the greatest kinetic energy compared to a person, a ball, or leaves.

Front

Why do some substances float on water?

Back

Substances float on water because they are less dense than water.

Front

What is the unit of density?

Back

The unit of density is typically grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).

Front

How does temperature affect the density of a substance?

Back

Generally, as temperature increases, the density of a substance decreases.

Front

What is the principle of buoyancy?

Back

The principle of buoyancy states that an object will float if it displaces a volume of water equal to its weight.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.