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Horizon Fitness Ex 77 Elliptical
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Horizon Fitness Ex 77 Elliptical

Physics help please...?

I have such question Help !!! Comet Halley moves in an elongated elliptical orbit around the sun. At perihelion the comet distance is 8.75 x 107 km from the sun; at aphelion, it is 5.26 x 109 km from the sun. Find the semi-major axis, eccentricity, and the period of the orbit. Comet Halley was at perihelion in early 1986; when will it reach the perihelion again? G = 6.67 x 10-11 N.m2/kg2; Mass of sun = 1.99 x 1030 kg.

My favorite decision is Semi-major axis = [8.75 x 10^7 + 5.26 x 10^9] /2 a = 2.67 x10^9 km. = 2.67 x10^12 m --------------------------------------… If e is theEccentricity a - 8.75 x 10^7 = ae 2.67 x10^9 - 8.75 x 10^7 = 2.67 x10^9 * e e = 0.97 --------------------------------- The period T and radius a are related by the equation. T^2 = 4π^2 a^3 / GM = 4π^2 [2.67 x10^ 12] ^3/ 6.67 x 10-11*1.99 x 10^30 T = 2379344380.s = 75.44 years. --------------------------------------… Middle of the year2061. ==============================

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