A block of wood is floating on water at 0° with volume V0 above water. When the temperature of water increases from 0 to 10° , the change in the volume of the block that is above water is best described schematically by the graph

Question

A block of wood is floating on water at 0° with volume V0 above water. When the temperature of water increases from 0 to 10° , the change in the volume of the block that is above water is best described schematically by the graph (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

As temperature of water is increased from

0^{\circ} C

to

1 0^{\circ} C

, density of water initially increases upto a maximum at

4^{\circ} C

and then it reduces.
So, buoyant force on block of wood also increases till temperature reaches

4^{\circ}

'C and then decreases from

4^{\circ} C

to

1 0^{\circ} C

.
Hence, volume of block above water aiso increases upto

4^{\circ} C

and then decreases from

4^{\circ} C

to

1 0^{\circ} C

.

∴

Variation of

V_{0}

versus

t

as shown below.

Q. A block of wood is floating on water at 0∘ with volume V0​ above water. When the temperature of water increases from 0 to 10∘ , the change in the volume of the block that is above water is best described schematically by the graph

Q. A block of wood is floating on water at $0^{\circ}$ with volume $V_{0}$ above water. When the temperature of water increases from $0$ to $1 0^{\circ}$ , the change in the volume of the block that is above water is best described schematically by the graph