If the dimensions of a physical quantity are given by MaLbTc ,then the physical quantity will be
pressure if a = 1,b = -1,c = -2
velocity if a = 1,b = 0,c = -1
acceleration if a = 1,b = 1,c = -2
force if a = 0,b = -1,c = -2
In a SONAR system, the duration between sending of a search wave and receiving back of the reflected wave from an enemy submarine is 77s.If speed of sound in water is 1450 m/s,find the distance of the energy submarine.
55.8 km
65.8 km
52.8 km
62.8 km
How many significant figures are present in the expression 0.009m ?
3
2
1
4
One astronomical unit is
6.024 x 1226 m
9.46 x 1015 m
1.496 x 1011m
1.58 x 105 m
How many wavelength of Kr86 are there in one meter?
1650763.73
1560763.73
1065763.73
1560736.73
Which of the following has the dimensions of work?
Force
Velocity
Kinetic energy
Momentum
What is the distance in km of a quasar (farthest heavenly bodies) from which light takes 3 billion years to reach us?
2.8 x 1012 km
2.8 x 1022 km
3.8 x 1022km
3.72 x 1022 km
One Fermi is equal to:
10-7m
10-8m
10-15m
10-10m
The dimension of light year is:
LT-1
L
LT-2
T-1
In an experiment the angles are required to be measured using an instrument.29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale.If the smallest division of the main scale is half - a - degree (= 0.5°), then the least count of the instrument is
one minute
half minute
one degree
half degree
