ASTRONOMY QUESTIONS PLEASE HELP! I do not understand.?

1) A friend convinced you to invest your savings in an extraordinary business opportunity, a new Earth-orbiting satellites. The orbit was found to have an eccentricity e = 0.8 and a semi-major axis of 4,400 miles. Earth radius = 3954 miles. This person is still your friend? Explain and show their work. 2) a lunar orbiting satellite has a mass of 1,000 kg, an eccentricity e = 0.5 and a semi-major axis a = 6000 km. The total angular momentum MVR is 1.8 x 1010 kg km2/hr. What is the orbital velocity apolune (farthest point from the orbit of the moon)? Show your work. 3) A new planet was discovered orbiting a star whose mass is the same as that of the sun. planet's orbital period, determined from the periodic Doppler shift spectrum of the star, is known to be 16 years. What is the semi-major axis of the AU for the new planet? Show your work. Review of the theory of the third law?

1) Calculate the minor semiaxis quickly shows that the satellite has an orbit that would pass through the Earth 2) The speed at r = 6000 km is v = 1.8 x 10 Km2/hr/1 ^ 10 kg, 000 kg / 3.000 km / h 6000 km distance is a apolune 1 (+ e) * 1.5 = 6000 km = 9.000 km. Therefore, the speed is 3000 km / h * 6.000 km / 9,000 km = 2.000 km due to conservation of angular momentum. 3) The version of Newton's third law of Kepler says d [AU] ^ 3 = P [years] ^ 2 * [M SolarMasses] Therefore, in this case = (16 * 1 ^ 2) ^ (1 / 3) = 6.35 AU

L4D2 Custom Map reviews: ZOMBIES FROM PLANET X!!1! Pt. 2

Wand VuPoint Scanner Review I have an e-book reader I think I put everything I have is on paper in the device: Articles book reviews, the users or user manuals, cheat sheets, blah, blah and blah. But after spending several hours to scan a book fell out of print broke my standard desktop scanner Epson few weeks [...] Filed in categories: Desktop Gear reviews …
PLANET X PRODUCT REVIEW – TNG SCOOTER #1