soaring birds and glider pilots can remain aloft for hours without expending power. Discuss why this is so.

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.)

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

The unit of resistivity is the: ohm ohm-cm volt coulomb