siim 87y
- The unit of time in all system of measurement is the ………. . 13. kilogram
- The unit of mass in MKS system is ……… . 14.kilogram
15.The universe has the ………. size. 15.largest
16.The unit slug is the unit of ……… . 16.mass
- The SI unit is the modified form of …….. system. 17.MKS
- A watch can be used to measure the ……… . 18.time
- The mass of a boy is measured by a ……… . 19.balance
- One metre is equal to …….km. 20.10-3
- Elementary particles have the ……… size. 21.smallest
22.The earth can be regarded as a ………. . 22.clock
- The age of universe is ……… s. 23.2 x 1018
24…….. is the language of physics. 24.Mathematics
- There are ……. seconds in one year. 25.3.17 x 107
- 1.A physical quantity which has direction as well as magnitude is known as vector,
- Displacement has both magnitude and direction.
- The sum of three vectors, having unequal magnitude, can be equal to zero.
4.If P ⃗ + Q ⃗=0, P ⃗and Q ⃗ have the same magnitude.
- Vector R ⃗ and –R ⃗ have the same directions.
6.All basic quantities are scalar.
- A vector quantity has no direction.
- A weight vector and a displacement vector can be added.
- The magnitude of the resultant of the force 6
The size of the universe is ………
