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The density of a body is 5×103kgm3 and it w...

The density of a body is 5×103kgm3 and it weighs 1N in air. Calculate the apparent weight of the body when totally immersed in water. (Density of water =103kgm3,g=10ms2 )

A.

0.02N

B.

0.08N

C.

0.20N

D.

0.80N

E.

1N

Correct answer is D

Upthrust = weight of the water displaced =pvg= 1000 x 2 x 105=0.20N \\ Apparent weight = weight in air – upthrust = 1-0.2N=0.8N