Your father bought you a pair of shoes. When you wore the shoes, you realized there was a problem. The shoes were too long. Why might such a problem arise and how can it be mitigated?
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this is in science book of six class nps
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Such a problem arise because the accurate measurement of the size (length) of the foot was not taken by your father.
- To make an accurate measurements these are the two main requirements:
(i) One must have an appropriate instrument.
(ii) One should know how to use the instrument properly.
- Accurate measurements are of importance in situations where extreme precision is essential, such as in scientific experiments or in the construction of fine tolerance machinery.
- Here even an error in measurement of weight by 0.1 g can completely change the result of an experiment.
- Estimation will suffice in most daily, domestic situations such as 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.
- When making measurements that involve very large numbers or very small numbers, using one standard unit of length becomes very difficult and impractical. Therefore, the measurement which involving small number and submultiples of standard units are to be used and for large numbers multiples of standard units are used.
- While measuring the length of a line segment following precautions should be taken:
(a) Ruler should be placed exactly on the length to be measured.
(b) One should not use worn-out portions of the instrument.
(c) The Eyes should be kept vertically above that the point to measure.
- In the CGS system, the units of mass, length, and time are gram, centimeter, and second respectively.
- In the SI system, the units of mass, length, and time are kilogram, meter, and second respectively.
Hence Answer is because of the accurate measurement.
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