George walks to a friend’s house. He walks 750 meters North, then realizes he walked too far. He turns around and walks 250 meters South. The entire walk takes him 103 seconds. What is his average speed in meters per second?

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

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)

Amagnetic field applies forces on: a)static chargesb)moving chargesc)water flow