* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download 16 Test Review ppt! - Goshen Community Schools
Survey
Document related concepts
Definition of planet wikipedia , lookup
Rare Earth hypothesis wikipedia , lookup
History of Solar System formation and evolution hypotheses wikipedia , lookup
Observational astronomy wikipedia , lookup
Corvus (constellation) wikipedia , lookup
Aquarius (constellation) wikipedia , lookup
International Ultraviolet Explorer wikipedia , lookup
Formation and evolution of the Solar System wikipedia , lookup
Tropical year wikipedia , lookup
Solar System wikipedia , lookup
Geocentric model wikipedia , lookup
First observation of gravitational waves wikipedia , lookup
Dialogue Concerning the Two Chief World Systems wikipedia , lookup
Transcript
Test Review Chapters 12-16 Relativity Question #1 What happens to the gravitational force when 2 objects get farther away from each other? Gm1m2 F 2 d 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? Gm1m2 F 2 d 11 (6.67 x10 )(35)( 250) F 2 17 9 F 2.0 x10 N 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? E mc 2 E (.89)(3.00 x10 ) 8 2 E (.89)(9.00 x10 ) 16 E 8.0 x10 J 16 Question #6 The sun exerts a 3.5 x 1022 N force on the earth. What is the distance between the 1.99 x 1030 kg sun and the 5.97 x 1024 kg Earth? Gm1m2 F 2 d 11 30 24 (6.67 x10 )(1.99 x10 )(5.97 x10 ) 3.5 x10 2 d 22 2 11 30 24 3.5 x10 d (6.67 x10 )(1.99 x10 )(5.97 x10 ) 22 11 30 24 (6.67 x10 )(1.99 x10 )(5.97 x10 ) d 22 3.5 x10 2 22 d 2.26 x10 2 d 1.5 x10 m 11 Question 7 In Feb. 2007, the Hubble Telescope captured pictures of a dying star with a mass of 2.0 x 1030 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 8 10 m/s Question #10 What is the gravitational force 5 between a 7.5 x 10 kg object and a 2.50 x 108 kg object 11 that are 2.5 x 10 m apart? Gm1m2 F 2 d 11 5 8 (6.67 x10 )(7.5 x10 )( 2.50 x10 ) F 11 2 (2.5 x10 ) F 2.0 x10 19 N 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.