The captain of a spaceship orbiting planet X discovers that to remain in orbit at from the planet's center, she needs to maintain a speed of What is the mass of planet X? (G = 6.67 × 10-11 N ? m2/kg2 )
A) 2.8 × 1019 kg
B) 4.2 × 1017 kg
C) 2.8 × 1016 kg
D) 4.2 × 1014 kg
A
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Plane Mirrors: As you walk away from a plane mirror on a wall, the height of your image
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What important change in the Sun over the past four billion years is thought to be very important to understanding the climates of Venus, Earth, and Mars?
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Treat each of your eyes as a circular aperture of diameter 3.5 mm. Light of wavelength 500 nm is used to view two point sources that are 283 m distant from you
How far apart must these two point sources be if they are to be just resolved by your eye? Assume that the resolution is diffraction limited and use Rayleigh's criterion.
The first mate of a pirate ship shoots the noonday Sun with a sextant and measures the altitude to be 50o to the south on December 21 . The time on the ship's clock is 4 P.M. (GMT). What are the longitude and latitude of the ship?