When at rest a proton experiences a net electromagnetic force of magnitude 8.0 x 10-13 n pointing in the positive x direction. when the proton moves with a speed of 1.5 x 106 m/s in the positive y direction, the net electromagnetic force on it decreases in magnitude to 7.5 x 10-13 n, is it still pointing in the positive x direction?

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)