Science DBA Review

Front

What is a chemical formula?

Back

Letters and numbers showing the types and numbers of atoms that repeat to make up a substance.

Front

How do you calculate average speed?

Back

Average speed = Total distance / Total time.

Front

What is the average speed of a block pulled 0.90m in 2.5s?

Back

0.36 m/s.

Front

What is the effect of forces on the motion of an object?

Back

The net force determines the direction and acceleration of the object.

Front

If a baseball bat hits a baseball with a force of 100 N, what is the force exerted by the ball on the bat?

Back

100 N in the opposite direction.

Front

What does the subscript in a chemical formula represent?

Back

The number of each atom being represented.

Front

What is Newton's Third Law of Motion?

Back

For every action, there is an equal and opposite reaction.

Front

What is the formula for calculating force?

Back

Force = Mass x Acceleration.

Front

What is the unit of force?

Back

Newton (N).

Front

What is the difference between speed and velocity?

Back

Speed is scalar (magnitude only), while velocity is vector (magnitude and direction).