Advertisements
Advertisements
Question
Answer the following in detail.
When are approximations necessary in daily life and when should they be avoided?
Advertisements
Solution
An approximation or estimation is a reasonable guess about the measure of a physical quantity. For example, we use an approximation in adding salt to food while cooking. We use approximation when we try to figure out the time it would take to reach a certain place by car. In our daily life, we use approximations in many situations. They are useful as they save time. But, since they are not accurate in measurements, they should be avoided in scientific studies and experimentation.
APPEARS IN
RELATED QUESTIONS
Fill in the blank
l m3 =..........cm3
A car travels with a speed 12 m s”1, while a scooter travels with a speed 36 km h-1. Which of the two travels faster ?
A piece of brass of volume 30 cm3 has a mass of 252 g. Find the density of brass in (i) g cm-3, (ii) kg m-3.
The diagram below shows a stick placed along a metre RULER. The length of the stick is measured keeping the eye at positions A, B, and C.

Convert the following quantity as indicated:
10 lb = ………. kg
Answer the following in short.
Mention any two advantages of the metric system over traditional units.
Answer the following in short.
Which institution in the world maintains the guidelines for using the SI units correctly?
Answer the following in short.
What do you mean by a mean solar day?
Solve the following numerical problem.
20 one – rupee coins are placed one above the other. If their total height is 32 mm, find the thickness of one coin.
Write SI units for the fundamental quantity.
