Which of the following ratios is dimensionless?
Work/Power
Work/ Energy
Momentum / Power
Momentum/Energy
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 6400 km,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
Curie is the unit of :
Half-life period
Decay constant
Radioactivity
Nuclear force
The ratio of the dimensions of Planck's constant and that of the moment of inertia is the dimension of
frequency
velocity
angular momentum
time
The dimensional formula for Young's modulus is:
[ML-1T-1]
[M0LT-2]
[ML2T-2]
[MLT-2]
The dimensional formula of angular momentum is
MLT-2
ML-1T-
M1L2T-1
MLT-1
In the addition of following numbers with respect to significant figures find the correct answer 8.31 + 10.6723 + 0.0043
18.9866
19
18.99
18.987
The dimensional formula for frequency is
T
T-1
T-2
T2
The dimensional formula of velocity of gradient is
[M0L0T-1]
[M0LT-1]
[M-1L-1T-1]
The work done in lifting a 100 gm slot to a height of 1m is approximately
10 Joule
100 Joule
One Joule
0.1 Joule
