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प्रश्न
Answer the following in detail.
Why are multiples and submultiples of SI units required?
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उत्तर
Sometimes, the size of the SI unit is either too small or too big to measure a certain quantity. For example, a metre is too small a unit to measure the distance between two cities and too big a unit to measure the thickness of a wire. Hence, multiples and submultiples of units are required. Multiples are factors used to create larger forms whereas submultiples are factors used to create smaller forms of the SI units. For example, a centimetre is a submultiple and kilometre is a multiple of a metre.
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संबंधित प्रश्न
Fill in the blank
1 g cm-3 = _______ kg m-3.
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 |
Select the correct alternative
A boy travels a distance 150 m in 1 minute. His speed is
The length, breadth and height of a water tank are 5 m, 2.5 m and 1.25 m, respectively. Calculate the capacity of the water tank in (a) m3 (b) litre.
A car travels a distance of 15 km in 20 minute. Find the speed of the car in km h-1.
How long a train will take to travel a distance of 200 km with a speed of 60 km h-1 ?
Select the correct alternative:
The symbol of degree celsius is
Select the correct alternative:
A metre ruler is graduated in:
What is the physical quantity? give example.
A physical quantity A is dependent on other four physical quantities p, q, r and s as given below A = `sqrt("pq"/("r"^2"s"^3))`. The percentage error of measurement in p, q, r and s are 1%, 3%, 0.5% and 0.33% respectively, then the maximum percentage error in A is ______ %.
