Choose the letter of the answer that best completes

the statement or answers the question.

1. If a vehicle increases its speed from 20 mph to 60

mph, its braking distance will increase by

a. 3 times.

b. 4 times

c. 9 times.

d. 40 times.

4. What would be the most likely outcome if an event, such as nuclear war, caused large amounts of dust and ash to be put into the atmosphere? A. The dust and ash would have little effect on the climate. B.

How did rocks come to earth?

Shivering to warm up illustrates which characteristic of life? A. adaptation to environment B. homeostasis C. getting energy D. growth

When a neutral metal sphere is charged by contact with a positively charged glass rod, the sphere (1) loses electrons (2) gains electrons (3) loses protons (4) gains protons

Why was glass or plastic used to separate the filings from the magnets in the experiments? The experiment required me to place a bar magnet on a table, then place a sheet of glass or plastic over the magnet before sprinkling the filings over it.

A moving object always has energy in its?

What is the volume of a box that is 12 cm long, 2 cm wide, and 3 cm high?

Suppose a child drives a bumper car head on into the side rail, which exerts a force of 4000 N on the car for 0.200 s. (a) What impulse is imparted by this force?

If a soundproof door is almost shut but still leaves a small opening, what wave phenomenon is responsible for someone being able to hear sound from the room while standing by the wall to the side of the opening?

What happens to the force of gravitational attraction if the distance between two objects increase?