If you live in a very cold area, you may have seen the depth of a bank of snow shrink even though temperatures remain below the melting point of water. how might you account for this observation?

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.)

Why do astronauts in the space shuttle weigh less?

How can waves travel through ground?