Question

4. Give an example each of a situation where:
a. accurate measurement is necessary
b. accurate measurement is not necessary and only estimation is required
Give reasons.
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Answer 1

Answer:

PHYSICAL BALANCE AND SECOND BEAM BALANCE.

Answer 2

Answer:

A. Accurate measurements is needed where extreme precision is essential, such as in scientific experiments or in construction of fine tolerance machinery Example, if there is a error in measurement of weight by just \(0.1\ g\) can completely change the result of an experiment.

Explanation:

B. Estimation will suffice in most daily, domestic situations such as the mixing sugar or salt in food items. Here, a difference of 0.1 g in the amount of salt or sugar in food will not even be noticed.