Advertisements
Advertisements
Question
A boy makes a ruler with graduations in cm on it, (i.e. 100 divisions in 1 m). To what accuracy this ruler can measure? How can this accuracy be increased?
Advertisements
Solution
Total length of the ruler = 1 m = 100 cm
No. of divisions = 100
Length of each division = `"Total length"/"total no. of divisions"`
= 100 cm/100
= 1 cm
Thus, this ruler can measure with an accuracy of 1 cm.
To increase the accuracy, the total number of divisions on the ruler must be increased.
APPEARS IN
RELATED QUESTIONS
What is a lunar month?
Name the physical quantities which are measured in the given units:-
ly
It takes time 8 min for light to reach from the sun to the earth surface . If speed of light is taken to be `3 xx 10^8 "m/s"^-1` , find the distance from the sun to the earth in km .
Express the order of magnitude of the following quantity:
222444888 kg
What is a seconds pendulum?
The height of a tree can be measured by
The distance between Delhi and Chennai can be measured in ______.
Define measurement.
______ is the process of finding an unknown physical quantity by using a standard quantity.
