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प्रश्न
1 kg of rice is weighed by ______.
उत्तर
1 kg of rice is weighed by Beam balance
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संबंधित प्रश्न
The unit of length convenient on the nuclear scale is a fermi : 1 f = 10– 15 m. Nuclear sizes obey roughly the following empirical relation : `r = r_0A^(1/3)` where r is the radius of the nucleus, A its mass number, and r0 is a constant equal to about, 1.2 f. Show that the rule implies that nuclear mass density is nearly constant for different nuclei. Estimate the mass density of sodium nucleus. Compare it with the average mass density of a sodium atom obtained in Exercise 2.27
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):
Fill in the blank:
The ............ of an object is measured with the help of a beam balance.
Define mass.
Solve the following numerical problem.
The masses of five marbles are 50 g, 55 g, 60 g, 65 g, and 70 g. Find their average mass.
Complete the analogy.
Milk : Volume :: Vegetables :___?
On the moon, the gravitational force is greater than on earth.
Leaves and pieces of paper are heavier things.
Give an example of a device used to find the accurate measurement of weight.
Where are the electronic balances used?
