True or false: we are able to see an object when it emits or reflects one or more visible light frequencies.

Acube has a volume of 2011 cubic inches. what is the angle measure between a side of a cube and its interior diagonal?

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° 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.)

What properties of a moving object are used in determining the object's energy of motion