1.The average radius of the earth around the sun is 1.5x10 11 m. What is the ear

Question

1.The average radius of the earth around the sun is 1.5x1011m. What is the earth's speed around the sun?

30.km/s

4.8km/s

29000km/s

0.76km/s

Cannot be determined.

2.

A person is standing on the surface of the earth. What is the ratio of the strength of the gravitational field of the sun (Msun=2.0x1030kg) at the person (1.5x1011m away) compared to gravitational field the earth (Mearth = 6.0x1024kg) at the person (6.4x106m away)?

17%

0.59%

170%

0.060%

Cannot be determined

30.km/s

4.8km/s

29000km/s

0.76km/s

Cannot be determined.

Explanation / Answer

1. Mass of sun = Msun=2.0x1030kg

Mass of Earth = Mearth = 6.0x1024kg

Average radius of earth around sun = r= 1.5x1011m

Force of gravitation between earth and sun = GMsunMearth/r2

= (6.67

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