Q. 213.8( 12 Votes )

# Calculate the average density of the earth in terms of g, G and R.

Answer :

Let mass of earth be M and its volume be V. Assuming earth to be perfect sphere

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A metal in which even iron can float is:

A. Sodium B. Magnesium

C. Mercury D. Manganese

Lakhmir Singh & Manjit Kaur - PhysicsThe density of water is 1000 kg/m^{3} and the density of copper is 8900 kg/m^{3}. Which of the following statements is incorrect?

A. = 8.9

B. = 8.9

C. = 8.9

D. = 8.9

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A. W and X B. W and Y

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Which object would float on water?

A. A

B. B

C. C

D. D

Lakhmir Singh & Manjit Kaur - PhysicsA solid of density 900 kg/m^{3} floats in oil as shown in the given diagram. The oil floats on water of density 1000 kg/m^{3} as shown. The density of oil in kg/m^{3} could be:

A. 850 B. 900

C. 950 D. 1050

Lakhmir Singh & Manjit Kaur - PhysicsThe relative densities of four liquids P, Q, R and S are 1.26, 1.0, 0.84 and 13.6 respectively. An object is floated in all these liquids, one by one. In which liquid the object will float with its maximum volume submerged under the liquid?

A. P B. Q

C. R D. S

Lakhmir Singh & Manjit Kaur - PhysicsCalculate the average density of the earth in terms of g, G and R.

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