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प्रश्न
Tick the most appropriate answer.
The SI unit of mass is
विकल्प
gram
milligram
kilogram
pound
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उत्तर
kilogram
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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):
Name the device commonly used to measure mass.
Name any one instrument used for measuring mass.
State whether true or false. If false, correct the statement.
In everyday life, we use the term weight instead of mass.
Using electronic balance weight can be measured accurately.
The unit is used to measure mass ______.
What is the standard unit of mass?
Name the device used for measuring the mass of atoms and molecules.
Express unified atomic mass unit in kg.
