What Mathematician gave Einstein his curved space idea, which led to his gravity discoveries?

How would you place two electrons on a sphere of radius r so that the electrostatic potential energy is minimized. how would you place three electrons to solve the same problem.

A- a of 8.00 cm a of 34.0 nc. a , -, a of 25.0 nc is on of a of 15.0 cm .be toto aof ? a) b) c) j d) e)

What is the coefficient of kinetic friction μk between the block and the tabletop?