Advertisements
Advertisements
प्रश्न
State or define the following term:
Second
Advertisements
उत्तर
“A second is defined as 1/86400 the part of a mean solar day.”
OR
Second may also be defined “as to be equal to the duration of9,192,631,770 vibrations corresponding to the transition between two hyperfine levels of cesium – 133 atoms in the ground state.”
APPEARS IN
संबंधित प्रश्न
Name the physical quantities which are measured in the given units:
nm
A boy measures the length of a pencil and expresses it to be 2.6 cm. what is the accuracy of his measurement? Can he write it as 2.60 cm?
State four characteristics of a standard unit.
Express the order of magnitude of the following quantity:
0.000,000,127 s
What are the rules to be followed to make accurate measurement with scale?
The distance between your school and your house is 2250 m. Express this distance in kilometre.
Define measurement.
The super conductors are used to levitate trains from the track.
Questions based on Higher Order Thinking Skills:
|
There are three spheres A, B, C as shown below. Sphere A and B are made of same material. Sphere C is made of a different material. Spheres A and C have equal radii. The radius of sphere B is half that of A. Density of A is double that of C.
|
Now answer the following questions.
- Find the ratio of masses of spheres A and B.
- Find the ratio of volumes of spheres A and B.
- Find the ratio of masses of spheres A and C.
