Advertisements
Advertisements
प्रश्न
Find the odd one out.
विकल्प
kilogram
millimetre
centimetre
nanometre
Advertisements
उत्तर
kilogram
APPEARS IN
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
Define one kilogram, the S.I. unit of mass.
Fill in the blank.
The amount of matter contained in a body is known as its ...........
Name the device commonly used to measure mass.
Name the device commonly used to measure weight of a body.
On the moon, the gravitational force is greater than on earth.
Leaves and pieces of paper are heavier things.
Using electronic balance weight can be measured accurately.
Write a short note on the following:
Physical balance
Give an example of a constant which has a unit.
