Which of these is the second weakest of the four fundamental forces?

electromagnetic

gravity

strong nuclear

weak nuclear

It's weak nuclear force.

Explanation:

In order in increasing force: gravity< weak nuclear force< electromagnetic< strong nuclear force

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why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.