Consider point charges of +q and +4q, which are separated by 3.0 m. at what point, on a linebetween the two charges, would it be possible to place a charge of -q such that the electrostatic force acting on it would be zero?

Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ºc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in ×10^{-3} −3 m)

The energy equivalent of the rest mass of an electron is