What is the frequency of a wave that has a wavelength of 20 cm and a speed of 10 m/s?

50 Hz

200 Hz

0.5 Hz

10 Hz

A2k pendulum has a speed of 1 m/s at a height of 1/2 meter

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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)