Sunil Batra Solutions for Chapter: Floating Bodies, Exercise 4: Summative Assessment Some Solved CBSE Sample Questions

If two weights of unequal volumes are balanced in air, what will happen if they are completely dipped in water?

Differentiate between upthrust and weight.

When does an object float or sink?

A dining hall has dimension $50 \mathrm{m}\times 15 \mathrm{m}\times 3 \mathrm{m}$. Calculate the mass of air in the hall. Density of air $=1.3 \mathrm{kg} {\mathrm{m}}^{-3}$.

During the vacations, Nitin visited his native village. He observed that for washing clothes, villagers used water from the well. Out of curiosity he drew water from the well and observed that the bucket full of water appeared to be heavier as it came out of water. Name the principle used in the above passage.

During the vacations, Nitin visited his native village. He observed that for washing clothes, villagers used water from the well. Out of curiosity he drew water from the well and observed that the bucket full of water appeared to be heavier as it came out of water. Answer the following.

(a)Why does the bucket appear to be heavier in air? 

(b)Which values are reflected in Nitin's behaviour?

The SI unit of pressure is :

A helium filled balloon moves upwards when released. This is because :