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:

A poorly calibrated balance mainly produces:

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

Sudden changes in room temperature may cause:

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

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

The surface of mercury in a measuring cylinder is generally:

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

Which instrument directly measures the duration of a laboratory event?

How many significant figures are in 0.00450?