A sphere Q1 with a charge of -2,5micro coulomb is placed 1m away from a second sphere Q2 with a charge of 6micro coulomb. The spheres lie on a straight line. Point P is located at a distance of 0,3m to the left of Q1 , while point X is located between Q1 and Q2 . Show with the aid of a vector diagram why the net electric field at point X cannot be zero.​

If the temperature were raised very high, classically what would we expect the heat capacity per object to be for this one-dimensional system? give a numerical value. chigh t = __ j/k/object (one reason for the discrepancy is that the high-temperature limit assumes that the number of oscillators is large (n > > 1), which is not the case in this tiny system.)

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity