The number of significant figures in 0.00097 are
5
4
6
2
One meter = ______AU
6.67x10-12AU
1.58x 10-5ly
4.86x10-6AU
1.057 x 10-10ly
The dimensional formula for surface tension is
[MLT-2]
[ML-1T-2]
[MLT-1]
[M1L0T-2]
Which of the following have same dimension?
Work and power
Impulse and momentum
Planks constant and gravitational constant
Pressure and work
In SI system of unit,the unit of pressure is
Atmosphere
Dynes per square cm
Pascal
torr
A satellite is moving on a circular path of radius r around the earth has a time period T.If its radius slightly increases by Δr,the change in its time period is
3/2(T/r)Δr
2/3(T/r)Δr
3/2(T2/r2)Δr
None of these
ML2T-2 is the dimensional formula for
Force
Work
Power
Surface tension
Parallax angle of a heavenly body measured from two points diametrically opposite on the equator of the earth is 1.0 minute.If the radius of the earth is 6400km,find the distance of the heavenly body from the earth.
4.4 x 107 km
4.2 x 106 km
4 x 107 km
4.2 x 105 km
If σ = surface charge density,ε = electric permeability,the dimensions of σ/ε are same as
Electric force
Electric field intensity
Electric charge
Pressure
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
