Test Review Chapters 12-16 Relativity. Question #1 What happens to the gravitational force when 2 objects get farther away from each other?

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Presentation transcript:

Test Review Chapters Relativity

Question #1 What happens to the gravitational force when 2 objects get farther away from each other?

It decreases!

Question #2 A 35 kg rock and a 250 kg rock are placed 17 m apart. What is the gravitational force between them?

Question #3 How fast must a spaceship travel to be able to leave the earth’s gravitational pull?

8 km/s

Question #4 How long does it take light from the sun to travel to Earth?

8 minutes

Question #5 How much energy is contained within a T-84 calculator with a mass of 0.89 kg?

Question #6 The sun exerts a 3.5 x N force on the earth. What is the distance between the 1.99 x kg sun and the 5.97 x kg Earth?

Question 7 In Feb. 2007, the Hubble Telescope captured pictures of a dying star with a mass of 2.0 x kg.. If this star was 4,200 light years away, how long ago did the star die?

~ 4,200 years ago

Question #8 At what point during the planet’s orbit around the sun does it have the least amount of velocity?

S

Question #9 What is the speed of light? (in m/s) ?

3.00 x 10 8 m/s

Question #10 What is the gravitational force between a 7.5 x 10 5 kg object and a 2.50 x 10 8 kg object that are 2.5 x m apart?

Question #11 2 objects are attracted to each other. What happens to their speed as they get closer?

It increases!

Question #12 What were black holes before they became black holes?

Stars!

Question #13 Name 2 points during the planet’s orbit around the sun where it has the same amount of velocity.

All below are correct… P & V Q & U R & T

Question #14 If our sun were to become a black hole tomorrow, what would happen to the earth’s orbit around the sun?

Nothing. …because our orbit is due to the gravitation between the sun & the earth, and that didn’t change simply because the sun became a black hole. A black hole is the same mass, but in a much smaller package!

The end.