If the volume of water tank is 6m m3, how many kg of water can the water tank hold at most? (the density of water is 1 times 10 cubic kg / M m3)

If the volume of water tank is 6m m3, how many kg of water can the water tank hold at most? (the density of water is 1 times 10 cubic kg / M m3)

Ha ha, the problem of primary school students, 1 cubic meter volume can put 1 ton of water

What is the area of aluminum block with thickness of 12 mm and mass of 16.2 kg? (the density of aluminum is 2.7 × 10 & sup3; kg / M & sup3;)

Mass = density × volume = P.v (density expressed by P)
=p.s.h h=12mm=0.012m
So the area s = m / P.H
=16.2/2700×0.012
=16.2/32.4
=0.5
Therefore, the area of the aluminum block is 0.5 square meters

The density of an oil agent is 8 × 10 square kg / m ^ 3. If 0.8 mg of the oil agent is dropped on the water surface, the maximum oil film area can reach? M ^ 2
2X10^22
wrote it wrong.

It feels like 10 ^ 3 times
According to the density, the volume of 0.8mg oil is 10 ^ - 6m ^ 3, the molecular diameter of oil is 10 ^ - 9m, then the area is 10 ^ - 6 / 10 ^ - 9 = 10 ^ 3M ^ 2