If we drop two iron balls, one ball is bigger than another one, from same height which will fall first to ground? Explain why.

If you touch a hot light bulb and get burned, that is an example of a. radiation b. convection c. conduction

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)

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