Three equal point charges, each with charge 1.15 μC, are placed at the vertices of an equilateral triangle whose sides are of length 0.650 mm.
What is the electric potential energy U of the system? (Take as zero the potential energy of the three charges when they are infinitely far apart.)

In the first law of thermodynamics, triangle e=q-w, what does q stand for

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p

Energy flows from the producer level to the level. is called