There is degree of ambiguity in this question due to the way cubic measures are expressed. You could be referring to a cube that is 15 cm along each side or the volume of 15 one-cm cubes.
In either case, 1 cm = 0.01 m so 1 cm3 = 0.01m * 0.01m * 0.01m = 0.000001 m3
So, 15cm*15cm*15cm cube = 3375 cm3 0.003375 m3
while 15 cm3 = 0.000015 m3
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There are 35.315 cubic feet in a meter cubed.... .....and I am not anonymouse or a vandal or a visgoth....!!!!!!!
a cubic meter is one meter cubed or to the 3rd power.
Ppb means parts per billion. When you are talking about weight per volume, a gram is deemed equivalent to a millilitre. Micrograms per metre cubed means micrograms per 1000 litres. You will have to divide by 1000 to convert to micrograms per litre, giving you ppb.
They are the same.
1 cubic meter of water weighs 1 tonne = 1000 kilograms.