The photosphere refers to the Sun's:
core
atmosphere
surface
magnetic field

Imagine you had to physically add electrons, one at a time, to a previously neutral conductor. you add one electron very easily, but the second electron requires more work. in your initial post to the discussion, explain why this is. also, what happens to the work needed to add the third, fourth, fifth, and subsequent electrons

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?