- ACompanion cell
- BMature sieve tube
- CPhloem parenchyma
- DCollenchyma
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The value of acceleration due to gravity of earth:
The density of water is 1000kg/m3 and the density of copper is 8900kg/m3. Which of the following statements is incorrect?
$=\frac{\text{The density of a certain volume of copper}}{\text{The density of the same volume of water}}=8.9$
$=\frac{\text{The volume of a certain mass of copper}}{\text{The volume of the same mass of water}}=8.9$
$=\frac{\text{The weight of a certain volume of copper}}{\text{The weight of the same volume of water}}=8.9$
$=\frac{\text{The mass of a certain volume of copper}}{\text{The mass of the same volume of water}}=8.9$
The momentum of a bullet of mass 20g fired from a gun is 10kg m/s. The kinetic energy of this bullet in kJ will be: