Which ocean contacts only one continent?
Pacific
Arctic
Southern
Indian

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

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.)