5. Give reasons.
(a) It is not proper to measure quantities
by using body parts as units.
(b) It is necessary to get the weights
and measures standardized at regular
intervals.
6. Explain the need for accurate
measurement and the devices to be
used for that.
Answers
Answer:
Explanation:
a.It is not proper to measure quantities by using body parts as units because these are not reliable and unique. These units of measurement vary from person to person. ... So, it becomes necessary to get the weights and measures standardized at regular intervals.
b.Because of difference in physical conditions from place to place, the reference chosen as units for weights and measures varies. So, it becomes necessary to get the weights and measures standardized at regular intervals.
6. measuring instrument is a device used for measuring a physical quantity accurately and systematically. Its important in order to maintain data for future references. Measurement gives a standard and ready reference for day to day things and processes