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

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

The pitch of a micrometer screw gauge is the distance moved by its spindle during:

Which statement correctly distinguishes mass from weight?

If the Vernier zero lies to the right of the main-scale zero when the jaws are closed, the zero correction is made by:

A physical balance determines an unknown mass by:

A Vernier calliper has a main-scale reading of 3.2 cm. Its 6th Vernier division coincides, and its least count is 0.01 cm. The observed reading is:

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

The depth of a hollow cylinder can be measured using the:

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