A block kept on a frictionless horizontal surface is acted upon by a force of 100 N, as shown in the figure. What magnitude of force must be applied on the block from the opposite direction to stop its motion? blocksmooth

A.
50 N
B.
75 N
C.
100 N
D.
200 N

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)