Question

a)A block of mass 7 kg and volume 0.07 m^3 floats in a liquid of density 140 kg m^3.calculate the volume of the block above the surface of the liquid .
b)A person moves 10 m towards east and then 10 m towards north. what is displacement .​

Answer 1

✴OLA!!✴

Refer to attachment⤴

Tysm❤

Answer 2

!! HEY MATE !!

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⚫Let 'v' be the Volume of the liquid displaced

⚫Now, Mass of the Floating water →

✏️=$7kg = v \times 140 \: kg \: {m}^{ - 3}$

✏️=$v = 0.05 \: {m}^{3}$

⚫Volume of the block above the surface of the liquid =

✏️=$0.07 {m}^{ 3} - 0.05 {m}^{3} = 0.02 {m}^{3}$

Hence :----

⚫Total Displaced ---------

OB =

✏️=$\sqrt{ {oa}^{2} + {b}^{2} }$

✏️=$\sqrt{ {10}^{2} + {10}^{2} } = \sqrt{100 + 100}$

✏️$= \sqrt[10]{2} m = 10 \times 1.414m$

✏️$= 14.14m$

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