Two balls, each with a mass of 0.890 kg, exert a gravitational force of 8.06 × 10−11 n on each other. how far apart are the balls? the value of the universal gravitational constant is 6.673 × 10−11 n m2 /kg2 . answer in units of m.

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

Which of the following is the largest disadvantage of about half of the electricity in the united states comes from burning

How does the motion of an airplane compare to the motion of a rocket ?