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Question
Which among the following is not a device to measure mass?
Options
Spring balance
Beam balance
Physical balance
Digital balance
Solution
Spring balance
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RELATED QUESTIONS
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 |
Answer the following in short.
What do you understand by the term ‘mass’? Name any one instrument used for weighing.
______ is used to measure mass.
The moon’s gravitational pull is one ______ of the earth’s pull.
Where are the electronic balances used?
Assertion (A): Mass, Length, and Time are fundamental physical quantities.
Reason (R): They are independent of each other.
Write a short note on the following:
Digital balance
Write a short note on the following:
Spring balance:
Express unified atomic mass unit in kg.
