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प्रश्न
Answer the following in short.
Which institution in the world maintains the guidelines for using the SI units correctly?
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उत्तर
General Conference of Weights and Measures.
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संबंधित प्रश्न
Match the following:
| Column A | Column B |
| 1.Volume of a liquid | 1. kg `m^-3` |
| 2. Area of a leaf | 2. `m^3` |
| 3. S.I. unit of volume | 3. graph paper |
| 4. S.I. unit of density | 4. m `s^-1` |
| 5. S.I.unit of speed | 5. measuring cylinder |
A car travels a distance of 15 km in 20 minute. Find the speed of the car in m s-1.
Express 15 m s-1 in km h-1.
Convert the following quantity as indicated:
4.2 m = cm
State if the following statement is true or false:
Second is considered as the fundamental unit of time in both CGS and MKS systems.
State if the following statement is true or false. Correct the statement if it is false.
The average of a group of observations is calculated by adding all the observations and dividing the sum by the number of observations.
Answer the following in short.
Explain the working of an extension spring balance.
Answer the following in detail.
When are approximations necessary in daily life and when should they be avoided?
Your friend was absent from school yesterday. You are enquiring about his absence. He told that he had a fever and it was measured to be 100oC. Is it possible to have a 100oC fever? If he is wrong, try to make him understand.
What is the physical quantity? give example.
