A mechanical stopwatch has 30 large divisions, with each divided into 10 smaller divisions. Its least count is:

A physical balance determines an unknown mass by:

For a liquid with a concave meniscus, the volume should be read from its:

Which statement correctly distinguishes mass from weight?

A measuring cylinder initially contains 45 mL of water. After immersing a stone, the level rises to 68 mL. The stone's volume is:

A micrometer shows 5.5 mm on the main scale and 32 divisions on its circular scale. If its least count is 0.01 mm, the reading is:

Which error produces a consistent difference in all readings of an experiment?

What is the main function of the ratchet in a micrometer screw gauge?

What is the best method for reducing random error?

A micrometer has a pitch of 0.5 mm and 50 circular-scale divisions. Its least count is:

Which statement correctly explains accuracy and precision?