Question

what are the least counts of the spring balance and the measuring cylinders respectively ????

Answer 1

east count of a measuring instrument is the least value of physical quantity that can be measured accurately using the instrument.

For example,

Take a spring balance whose range is 0-25kg. In this scale, you can see that the 1kg is divided into 10 equal parts. Therefore, the least value it can measure is 100g which can be found out by,

Measurement=1kg

Number of divisions=10

Least count=1/10 =0.1kg or 100g

Hence 100g is the least count of this instrument.

In the similar way you can find the least count of different spring balances of different range.