When a piece of iron of mass 78 gm is put in a gratuated cylinder containing 100cm of water, the reading of the cylinder becomes 110 cm . calculate the density of the iron

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.