ASTR100 HW5

ASTR100 HW5 - speed. This is mathematically represented by...

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Julie Gilbert March 4, 2008 ASTR100 Homework #5 43. a. The further away a planet is from the sun, the lower its surface temperature. The notable exception is Mercury’s surface temperature at night. b. The terrestrial planets have similar densities, and they are significantly more dense than the jovian planets. The composition of terrestrial planets is made of rocks and metals, while the jovian planets are gaseous or ices. The terrestrial planets are also significantly closer to the sun than are the jovian ones. c. The orbital periods increase with distance from the sun. This is demonstrated in Kepler’s third law which states that more distant planets orbit the sun at a slower average
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Unformatted text preview: speed. This is mathematically represented by P^2=A^3. d. The rotation period column would indicate the length of a planets day. The first two planets having much longer rotation periods, and the rest of the planets have relatively similar periods. e. I dont think Mercury or Jupiter have seasons because their axis tilt is not significant enough to change the amount of sunlight they get which determines the seasons. 49. a. Half life=4.5 bil yrs 55% of 4.5 bil years=2.475 the rock is 2.475 billion years old b. 63% of 4.5 bil years= 2.835 yrs. This rock is .36 billion years older....
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