PLS HELP: if an object travels for 15 min with a constant velocity of 12 mph west, what is the acceleration?

An observer that stands still as the electron moves by him, will observe

What is hidden during a lunar eclipse? isn't the moon hidden?

Suppose you have a box. which of these is not necessarily a true statement regarding the relationship between the force applied to the box, the work done on the box, and the distance the box is moved? a. if the box is not moved, no force is being applied to the box. b. if no force is applied to the box, no work is done on the box. c. if work is done on the box, then a force is applied to the box. d. if work is done on the box, then the box is moved a distance.