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Units and Measurement
Question
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Which of the following measurements are not done by screw gauge:

0.3200cm, 5.4cm, 1.22cm, 0.00005mm

Answer

The measurements which do not require us to use screw gauge are 0.3200 cm, 5.4 cm and 1.22 cm. 

Since, 0.00005 mm is a very small quantity, using screw gauge will help us to measure it precisely. 

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Some More Questions From Units and Measurement Chapter

Give four examples of physical quantities.

Define unit.

What are the two main required characteristics of a unit?

Can we use same units for different physical quantities?

Can we use different units to measure same physical quantity?

To measure a physical quantity X, the unit U is repeatedly used for n times. What is the magnitude of physical quantity?

Does the numerical factor in the quantitative measurement depend on the system of unit used?

Is one unit sufficient to measure a physical quantity?

Can a physical quantity have two or more units? Give example.