Determine the weight of air with a volume of 10 m3 at a density of 1.3 kg / m3.

Given:

V = 10 m3 (cubic meters) – the volume occupied by air;

ro = 1.3 kg / m3 (kilogram per cubic meter) – air density.

It is required to determine P (Newton) – the weight of air.

Let’s find the mass of air:

m = ro * V = 1.3 * 10 = 13 kilograms.

Then, to determine the weight, you must use the following formula:

P = m * g, where g = 10 Newton / kilogram (approximate value);

P = 13 * 10 = 130 Newtons.

Answer: Air with a volume of 10 m3 weighs 130 Newtons.