Which digit in a measured value is called the doubtful digit?

The maximum conventional uncertainty of a metre rule with 1 mm least count is:

How many significant figures are in 0.00450?

Sudden changes in room temperature may cause:

How many significant figures are in 7.08?

A poorly calibrated balance mainly produces:

Repeated readings are close to one another but far from the accepted value. They are:

Reaction time when starting a stopwatch is mainly a source of:

In the overflow-can method, the volume of displaced water is equal to the:

Which method is suitable when a solid cannot fit inside a measuring cylinder?

A liquid volume changes from 30 mL to 52 mL after immersion of a solid. The solid's volume is: