During an Apollo moon landing, reflecting panels were placed on the moon. This allowed Earth-based astronomers to shoot laser beams at the moon's surface to determine its distance from Earth. The reflected laser beam was observed by the astronomers 2.52 s after the laser pulse was sent. If the speed of light is 3.00 times 10^8 m/s, what was the distance between the astronomers and the moon?

How would a small bar magnet be oriented when placed at position x?

The electric field inside a cell membrane is 8.0mn/c. what's the force on a singly charged ion in this field?

Which statement is true? a) the work done to lift an object 6 meters is greater than the gravitational potential energy it gains. b) the work required to push an object is less than the work required to pull an object the same distance. c) the work required to raise an object to a height is equal to the gravitational potential energy the object gains. d) the work done against gravity to lift an object straight up is greater than the work required to roll it up a ramp.