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.

The terminals of a battery are connected across two resistors in series. The resistances of the resistors are not the same. Which of the following statements are correct? a. The potential difference across each resistor is the same. b.

Speed equals distance divided by? a. time b. velocity c. size d. motion

if it takes a tennis ball falls straight down for 4 seconds from the top of a roof, how high above the ground is the roof?

A 38-kg canoe breaks free from its dock and floats downriver at a speed of 2.2 m/s. What is the momentum of the canoe? 48.0 m/s 76.0 kg m/s 83.6 kg m/s 0 m/s

Coal-fired power plants convert chemical energy to kinetic energy to mechanical energy to electrical energy. True False

The slope of a velocity versus time graph gives

Which of the following describes subatomic particles? carbon and nitrogen solids, liquids, gases larger than atoms protons, neutrons, and electrons

What is the difference between speed and velocity? A) velocity describes speed with direction. B) there is no difference. C) Velocity describes direction with position. D) Velocity is used in space, while speed is used on earth.

How do you calculate resistance with coulombs, time and J's?

Difference between specific heat capacity and latent heat?