Gravitational Field and Electrostatic

The time it takes a comet to complete one revolution is called the

• focus

• period

• orbit

• ellipse

If the radius of an orbit were doubled, what effect would it have on its period of orbit?

• no effect

• would increase

• would decrease

• need more information

According to Kepler's laws, the paths of the planets are

• ellipses

• Earth-centered

• circles

• parabolas

It takes Pluto a longer time to orbit the sun than the Earth does because Pluto

• has much further to go

• goes much slower

• travels in an elliptical pattern

• all of the above

The speeds of the planets about the sun depend on

• their distances from the sun

• the masses of the planets

• their periods of rotation

• none of these

At which lettered position is the planet speeding up?

• A

• B

• C

• D

• E

At which lettered position does the planet have the greatest speed?

• A

• B

• C

• D

• E

The direction of electric field lines shows the

• direction of the force on a test positive charge

• strength of the field

• size of the field

• all of the above

Why does a balloon stick to a wall after you rub it in your hair?

• the balloon is neutral and so is the wall

• The negative balloon attracts the negative electron clouds

• The wall is just sticky

• The negative balloon repels the electron clouds

What happens to the gravitational and electric force if you triple the distance of separation?

• 1/9

• 9

• 3

• 1/3

Tags

NGSS.HS-PS2-4