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^{-3}, find the fall in barometric height in mm of Hg at a height of 107 m above the sea level. Take density of mercury = 13.6 $\times $ 10^{3}kg m^{-3}.(Answer:- 10 mm of Hg)

Q. 14. Will the weight of an ' Iron sinker plus cork' combination in water be more or less than that of the iron sinker along in water ? Give a very brief explanation for your answer.

Q.5. Assuming the density of air to be 1.295 kg ${m}^{-3}$, find the fall in barometric height in mm of Hg at a height of 107 m above the sea level. Take density of mercury = 13.6$\times {10}^{3}$ kg ${m}^{-3}$.

Answer 0.428

A 1. A man first swims in seawater and then in river water.

(i) Compare the weight of seawater and river water displaced by him.

(ii) Where doeshe find it easier to swim and Why?

Q 2. State the law of floatation.

Q. 3. Will a body weight more in air or in vacuum when weighed with a spring balance? Give a reason for your answer.

Q 5. Shile floating, is the weight of the body greater than, equat to or lesser than the upthrust?

Please help with this one

(1) Upthrust on the body.

(2) Vol. Of body. (Density=1gm/cm?).

ExplainVariation of atmospheric pressure with altitude

Plz give me answer fast very urgent

Q.15. A piece of iron weighs 44.5 gf in air. If the density of iron is $8.9\times {10}^{3}kg{m}^{-3}$, find the weight of iron piece when immersed in water.