SATHEE: Properties Of Solids And Liquids Question 233

Properties Of Solids And Liquids Question 233

Question: A streamlined body falls through air from a height hon the surface of a liquid. If d and D(D > d) represents the densities of the material of the body and liquid respectively, then the time after which the body will be instantaneously at rest, is

Options:

A) 9 minute

B) 7 minute

C) 5 minute

D)3 minute

Show Answer

Answer:

Correct Answer: B

Solution:

Time taken to be emptied for h height, $t = \sqrt{\frac{2 h}{g}}$

and for $\frac{h}{2}$ height, $t^{'} = \sqrt{\frac{2 h / 2}{g}} = \sqrt{\frac{h}{g}}$

$\frac{t^{'}}{t} = \frac{1}{\sqrt{2}} \Rightarrow t^{'} = \frac{t}{\sqrt{2}} = \frac{10}{\sqrt{2}} = 7 m i n u t e$

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Properties Of Solids And Liquids Question 233

Question: A streamlined body falls through air from a height hon the surface of a liquid. If d and D(D > d) represents the densities of the material of the body and liquid respectively, then the time after which the body will be instantaneously at rest, is

Options:

Answer:

Solution:

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