Atoms have no electric charge because they have

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow

Which statements did both aristotle and ptolemy assume? check all that apply.