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प्रश्न
Assertion(A): The scientifically correct expression is “ The mass of the bag is 10 kg”
Reason (R): In everyday life, we use the term weight instead of mass.
विकल्प
Both A and R are true but R is not the correct reason.
Both A and R are true and R is the correct reason.
A is true but R is false.
A is false but R is true.
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उत्तर
Both A and R are true but R is not the correct reason.
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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.
We can say that mass of an object is 126 kg.
1 metric ton is equal to ______.
State whether true or false. If false, correct the statement.
In everyday life, we use the term weight instead of mass.
State whether true or false. If false, correct the statement.
A physical balance is more sensitive than a beam balance.
Amount of matter:: mass: Gravitational Pull:: ______.
Where are the electronic balances used?
Write a short note on the following:
Physical balance
