Physics
The correct relation between density and relative density is :
R.D. =
R.D. =
R.D. =
None of these
Fluids Upthrust
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Answer
R.D. =
Reason — In C.G.S. system, density of water at 4°C is 1 g cm-3, so the relative density of a substance is equal to the numerical value of density of that substance.
Thus, R.D. =
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Related Questions
Relative density of a substance is expressed by comparing the density of that substance with the density of:
- air
- mercury
- water
- iron
The unit of relative density is:
- g cm-3
- kg m-3
- m3 kg-1
- no unit
The correct expression for relative density when the weight of a body in air is W1, and in water is W2 is given by :
R.D. = 2}{\text{W}1 - \text{W}_2}
R.D. = 1}{\text{W}1 + \text{W}_2}
R.D. = 1 + \text{W}2}{\text{W}_1}
R.D. = 1}{\text{W}1 - \text{W}_2}
If the weight of a body in air is W1, in a liquid is W2 and in water is W3, then :
R.D. of liquid = 2 - \text{W}3}{\text{W}1 - \text{W}3}
R.D. of liquid = 1 - \text{W}2}{\text{W}1 - \text{W}3}
R.D. of liquid = 2 - \text{W}3}{\text{W}1 + \text{W}3}
R.D. of liquid = 1 - \text{W}2}{\text{W}1 + \text{W}3}