Question

1.) Define upthrust.
2.) Define buoyancy
3.) In what direction does the buoyant force on an object immersed in a liquid act?
4.) What is the other name of buoyant force?
5.) Under what condition a body sink in a liquid?
6.) Under what condition a body floats in a liquid?
7.) Name the instrument which is used to determine the density of a liquid.
8.) Name the instrument which is used to determine the purity of a sample of milk.
9.) Name the principle which gives the buoyant force.
10.) What is the density of water in S.I. unit?

Answer 1

4) upthrust force

6) if the density of object is less than that of liquid then it will float on the liquid.

5) if density of object is greater than that of liquid then it will sink on the liquid.

7) hydrometers

8) lactometers