homework #7

# homework #7 - Ben Milkovich Astro 205 Joe Lowry 4 Asteroid...

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Ben Milkovich Astro 205 Joe Lowry 4) Asteroid of P d = 2.0 AU and A d = 4.0 Au. Find (A)semimajor axis, (B)eccentricity, and (C)period. (a) AU AU AU 0 . 3 2 0 . 4 0 . 2 = + = semimaor axis (b)Pd = ty eccentrici a a P e e a = = + - = + - = - 3 1 3 3 2 ) 1 ( d (c) 27 3 3 2 = = = a P a P years = Period 6) Halley’s Comet has P d = .6 AU and P = 76 years. Find A d . AU e a A a a P ty exxentrici years years p a a P d d 28 . 35 ) 96655 . 1 ( 5776 ) 1 ( 96655 . 5776 5776 6 . 94 . 17 5776 3 3 3 3 3 2 3 2 + = + = = + - = + - = = = = 8) How long would it take a radar signal take to complete a round trip between Earth and Mars when the two planets are .7 AU apart? d=.7AU*2=1.4AU 1AU = 1.49598E11 meters
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Unformatted text preview: 6 . 698 / 299792458 4 . 1 * 11 49598 . 1 = = = ∴ = s m AU m E s d T t d S seconds or 11.643 minutes 12) The acceleration due to gravity at Earths surface is 9.8m/s/s. What is the gravitational acceleration at altitudes of (a) 100km; (b) 10,000km? take earths radius to be 6400km 2 2 24 11 2 2 1 48 . 1 16400000 24 9742 . 5 * 11 67 . 6 ) ( 43 . 9 000 , 6500 9742 . 5 * 67 . 6 ) ( s m E E F b s m E E R m m G F a ≈-= ≈ = =-...
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