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प्रश्न
Give reasons.
It is not proper to measure quantities by using body parts as units.
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उत्तर
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.
संबंधित प्रश्न
Write an answer to the following question in your own words.
What precautions will you take to make accurate measurements in day-to-day affairs?
Explain, giving examples, the errors that occur while making measurements.
Give reasons.
It is necessary to get the weights and measures standardized at regular intervals.
Explain the need for accurate measurement and the devices to be used for that.
The closeness of the measured value to the original value is _______.
Explain a method to find the thickness of a hollow tea cup.
Numerical Problem.
Find the thickness of a five rupee coin with the screw gauge, if the pitch scale reading is 1 mm and its head scale coincidence is 68.
Write a note on accuracy and precision.
Match the following.
| Column I | Column II |
| a) Temperature | Closeness to the actual value |
| b) Plane angle | Measure of hotness or coldness |
| c) Solid angle | Closeness to two or more measurements |
| d) Accuracy | Angle formed by the intersection of three or more planes |
| e) Precision | Angle formed by the intersection of two planes |
