Which of the following statements regarding the nature of physical laws is $NOT$ correct?
- AAll conserved quantities are necessarily scalars.
- BThe laws of nature do not change with time.
- CThe laws of nature are the same everywhere in the universe.
- DThe law of gravitation is the same both on the moon and the earth.
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Express:
$(a)$ The energy required to break one bond in $DNA$ in $eV$.
$(b)$ The kinetic energy of an air molecule $(10^{-21} \; J)$ in $eV$.
$(c)$ The daily intake of a human adult in kilocalories.
$(a)$ The energy required to break one bond in $DNA$ in $eV$.
$(b)$ The kinetic energy of an air molecule $(10^{-21} \; J)$ in $eV$.
$(c)$ The daily intake of a human adult in kilocalories.
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View Solution$0.1 \, Pa = \dots \, Nm^{-2} = \dots \, \text{dyne} \, cm^{-2}$.
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View SolutionThe units of length,velocity,and force are doubled. Which of the following is the correct change in the other units?
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View SolutionMatch the physical quantities in Column-$I$ with those in Column-$II$ having the same dimensions. The correct matching is:
$A$. Entropy $I$. Angular velocity $B$. Young's modulus of elasticity $II$. Boltzmann constant $C$. Angular momentum $III$. Energy density $D$. Decay constant $IV$. Planck's constant
| $A$. Entropy | $I$. Angular velocity |
| $B$. Young's modulus of elasticity | $II$. Boltzmann constant |
| $C$. Angular momentum | $III$. Energy density |
| $D$. Decay constant | $IV$. Planck's constant |
Although the units of torque and work are the same,why are they not the same physical quantities?
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