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Units and Measurement
Question
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What is the difference between measurement and counting?

Answer

 

Measurement  Counting
1. Measurement needs unit. 1. Counting does not need unit.
2. Measurement is done for continuous data. 2. Counting is done for discrete data.
3. Measurement can result in any real value outcome. 3. The outcome of counting is always a natural number.

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Some More Questions From Units and Measurement Chapter

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.

What are fundamental quantities?