Asap which has the greater density? (refer to "densities of common substances" table.) air at sea level air at 20 km altitude

Density of any substance is defined as mass per unit volume of that substance.

Density of air is inversely proportional to the altitude. This means that as the altitude increases, the density of air decreases, and vice versa.

Based on this, examining the choices given, we can conclude that the density of air is greater at sea level.

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You need to divided twenty four by a dozen them by the temperature it is getting cook by