At a winter recreation resort, snow tubers at the bottom of the hill hook their tubes to a tow rope. a motor pulls the rope so that tubers move at constant velocity to the top of the hill. (ignore the momentary acceleration of the tuber when he first attaches his tube to the rope.) the coefficient of kinetic friction between the tube and the snow is

There are weak or strong attractive forces between atoms of liquids with a high viscosity

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.

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)