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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.
Answer the following in short.
Explain the working of a beam balance.
Which among the following is not a device to measure mass?
State whether true or false. If false, correct the statement.
In everyday life, we use the term weight instead of mass.
Leaves and pieces of paper are heavier things.
Assertion (A): Mass, Length, and Time are fundamental physical quantities.
Reason (R): They are independent of each other.
Name the device used for measuring the mass of atoms and molecules.
What object and material were used to define the kilogram for 130 years before 2019?
