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Q.
A body of volume $100 \,cc$ floats immersed completely in water contained a jar. The weight of water and jar before immersion of the body was $700\, g$. After immersion weight of water and jar will be:
Solution:
As the body floats completely immersed in water,
Hence $W_{\text {body }}=W_{\text {displaced water }}$
= weight of $100\, cc$ of water
Or mass of body $=$ mass of $100 \,cc$ of water $=100\, g$
Hence, total mass $=700\, g +100 \,g =800\, g _{\text {. }}$