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 ………

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