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Density of air at room temperature is
The density of air at NTP is 1.3 kgm-3
Moment of force = r × F = [L] [MLT-2] = [ML2T-2]
Two quantities A and B have different dimensions. Which operation is physically meaningful
Surface tension of aliquid is 70 dyne/cm. Its value in SI is
\(s-70\frac{dyne}{cm}-\frac{70\times 10^{-5}N}{10^{-2}m}\)
The dimensional formula for relative refractive index is
\(\mu _{r}=\frac{\mu }{\mu _{0}}=\left [ M^{0}L^{0}T^{0} \right ]\)
The expression [ML-1T-2] does not represent
Power=\(=\frac{energy}{time}=\frac{ML^{2}T^{-2}}{T}=\left [ ML^{2}T^{-3} \right ]\)
he dimensional formula of wave number is
Wave number \(\overline{v}-\frac{1}{\lambda }-\frac{1}{L}-\left [ M^{0}L^{-1}T^{0} \right ]\)
N kg–1 is the unit of
N kg–1= force/mass = acceleration
Which of the following is a derived physical quantity?
The unit of current in C.G..S. system is
The C.G.S unit of current is called biot (Bi) i.e.,
\(1A-\frac{1C}{1sec}-\frac{(1/10)e.m.u \: of\: charge}{sec}-\frac{1}{10}Bi\) or 1 Bi = 10A
Electron volt is a unit of