The equation that governs the circular orbit of a satellite is t = 2(pi)√(r3 / gme) where me is the mass of the earth, which is approximately 6 x 1024kg. assuming a circular orbit, to achieve an orbit at 20,000km, what would the speed need to be?

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Which statement correctly describes the relationship between frequency and wavelength?

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