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प्रश्न
State whether true or false. If false, correct the statement.
A physical balance is more sensitive than a beam balance.
विकल्प
True
False
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उत्तर
A physical balance is more sensitive than a beam balance- True
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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
Match the following column:
| Column A | Column B |
| (a) Length of a housing plot | (1) Clock |
| (b) Breadth of a book | (2) Beam balance |
| (c) Mass of an apple | (3) Thermometer |
| (d) Period of time for study | (4) Measuring tape |
| (e) Temperature of a body | (5) Graph paper |
| (f) Surface area of a leaf | (6) Metre ruler |
Define mass.
Tick the most appropriate answer.
The SI unit of mass is
Name the device commonly used to measure weight of a body.
The moon’s gravitational pull is one ______ of the earth’s pull.
Stop clock:: accurate time: _______:: accurate weight.
Write a short note on the following:
Common (beam) balance:
Write a short note on the following:
Spring balance:
Since 2019, the kilogram has been redefined based on which fundamental physical constant?
