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प्रश्न
Answer the following in short.
What are the characteristics of a standard unit?
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उत्तर
1. It should be accepted universally.
2. It should be accurate.
3. It should be neither too small nor too big and easy to use.
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संबंधित प्रश्न
A solid silver piece is immersed in water contained in a measuring cylinder. The level of water rises from 50 ml to 62 ml. Find the volume of silver piece.
A block of iron has dimensions 2 m × 0.5 m × 0.25 m. The density of iron is 7.8 g cm−3. Find the mass of block.
Name four basic measurements in our daily life.
Name two devices used to measure the short time interval of an event.
State if the following statement is true or false:
The symbol used for a unit is always written in capital letters.
Answer the following in detail.
What are the fundamental physical quantities? Name any three fundamental physical quantities.
State if the following statement is true or false. Correct the statement if it is false.
The region enclosed within the boundaries of a two-dimensional figure is called its area.
Solve the following numerical problem.
The rainfall in a city on each day of a week is recorded below. Find the average rainfall for the week.
| day | Mon | Tue | Wed | Thurs | Fri | Sat | Sun |
|
Rainfall |
1.2 | 10.3 | 5.5 | 0.0 | 13.5 | 7.0 | 1.0 |
Who is my companion?
| Group 'A' | Group 'B' | ||
| 1 | Velocity | a | litre |
| 2 | Area | b | kilogram |
| 3 | Volume | c | metre/second |
| 4 | Mass | d | kilogram/cubic metre |
| 5 | Density | e | square metre |
Write SI units for the fundamental quantity.
