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2014-10-12T12:41:05+05:30

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I) Pressure = [ML⁻¹T⁻²]
   Energy per unit volume =  [ML⁻¹T⁻²]

So the first one is correct

ii) Pressure = [ML⁻¹T⁻²]
    Momentum × volume × time = [ML⁴]
So the second one is not correct
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2014-10-15T05:21:09+05:30

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This is a quick way of doing it. The right way is to write the dimensional formulas and check them.

Pressure = Force / Area              Energy/volume = Force * distance/ volume
                                                                        = Force / area
So pressure= Energy / volume

ii)
 Momentum * volume * time = (Force * time) * volume * time 
so it is not equal to Force / area

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