Why don’t skateboarders keep flying through the air when they launch off a ramp

Blank liquids and gases exert a buoyant force on objects placed in them

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 (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to

What are the dimensions of the cross section that passes through the points a, f, g, and d?