Question

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if u know all the answers then only answer

1) will a body weight more in air or vacuum when weighted with a spring balance? gve reason 4 ur answer.
2)a small block of wood is held completely immersed in (i)water,(i)glycerine and then released . in each case , wt do u observe ?explain the difference in ur observation in the 2 cases

this q.. is 4 20 points and the best answer with fully explanation will be marked as the brainliest one

Answer 1

1.a body weight more in vacuum then in air because in air there is a application of buoyant force over it which reduces it's weight. .2. a small wooden block immersed in water and after releasing it we will notice that in water the object feels to be light because of the application of bouyant in the water but it is vice versa in another case . ..,,...... hope it helps ......

Answer 2

1 When a body is weighed with a spring balanceit will weigh more in vacuum. ... When a bodyis weighed in air the buoyant force of the air will reduce its weight. Contrarily, in vacuumthere would be no such force, thus the weightof a body would be more, though negligible.

2 When the wood is placed in water, it will be half above the water surface and the rest half inside I.e. it will float partially. (Density of wood = 500 kg/m³ and of water = 1000 kg/m³)
But in glycerine it will float completely
(Density of glycerine = 1260 kg/m³)