Advertisements
Advertisements
Question
What are the S.I. units of
- mass
- length
- time and
- temperature.
Write their names and symbols.
Advertisements
Solution
S.I. units are as follows:
| Quantity | S.I. unit | Symbol of S.I. unit |
| (1) Length | metre | m |
| (2) Mass | kilogram | kg |
| (3) Time | Second | s. |
| (4) Temperature | kelvin | K |
APPEARS IN
RELATED QUESTIONS
Length of one’s chest can be measured using metre scale.
While measuring the length of a sharpened pencil, the reading of the scale at one end is 2.0 cm and at the other end is 12.1 cm. What is the length of the pencil?
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 | ||||

What is Dinesh’s height in metres? _____ m _____ cm.
How wide is the rectangle? ________ cm
You can play this game on the ground. Make two squares of one square meter each. Divide your class into two teams. Ready to play!
- Which team could make more children stand in their square? How many?
What is the unit of length?
Why is the speed of light used to define the metre?
The parallax method is used to measure astronomical distances because ______.
Which instruments are used to measure very small distances at the atomic scale?
