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प्रश्न
Complete the analogy.
Height of a person: cm :: Length of your sharpened pencil lead:______?
उत्तर
Height of a person: cm :: Length of your sharpened pencil lead: mm (millimetre).
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संबंधित प्रश्न
The farthest objects in our Universe discovered by modern astronomers are so distant that light emitted by them takes billions of years to reach the Earth. These objects (known as quasars) have many puzzling features, which have not yet been satisfactorily explained. What is the distance in km of a quasar from which light takes 3.0 billion years to reach us?
Just as precise measurements are necessary in science, it is equally important to be able to make rough estimates of quantities using rudimentary ideas and common observations. Think of ways by which you can estimate the following (where an estimate is difficult to obtain, try to get an upper bound on the quantity):
the number of strands of hair on your head
Exercise
Metre is the unit of ______.
Can you find the diameter of a thin wire of length 2 m using the ruler from your instrument box?
Now guess the length and width of many other things. Measure and find the difference between your measure and your guess.
| Size of | Your guess in cm | Your measure in cm | ||
| Length | Width | Length | Width | |
| 100 Rupee note | ||||
| 10 Rupee note | ||||
| 20 Rupee note | ||||
| 5 Rupee note | ||||
| Post card | ||||
| Math-Magic book | ||||
How many stamps are needed to cover the rectangle?
The fencing of a square garden is 20 m in length. How long is one side of the garden?
Chumki, Jhumri, and Imran need wire to make a fence.
- How much wire in all will the three need?
What is the unit of measurements of very small lengths?
