What is the concentration of a solution in which 20.0 g of NaCl is dissolved in 1000 mL of water?

c- cold periods in earth's history during which glaciers covered much of the surface.

explanation:

10 years is the answer

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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