When jenny writes the pencil exerts a force of 5n on the paper
the area of the pencil in contact with the paper is 0.5 mm² calculate the pressure of the pencil on the paper
give the unit.

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

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?