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
The error in the measurement of radius of a sphere is 0.4%.Find the permissible error in the surface area.
Find the number of times the heart of a human being beats in 10 years.Assume that the heart beats once in 0.8 sec.
3.942 x 108 beats
3.942 x 103 beats
3.942 x 1010 beats
3.942 x 1012 beats
The SI unit for length is
If σ = surface charge density,ε = electric permeability,the dimensions of σ/ε are same as
Electric field intensity
The time period of a simple, pendulum is given by Tαla gh . The value of a and b are
The angle subtended by a satellite by the two directions of observation is 2.552 x 10-2 rad.If the diameter of earth is 1.276 x 107m. What is the distance of the satellite from the earth?
6 x 108 m
5 x 108 m
2.5 x 108m
4 x 108 m
In the addition of following numbers with respect to significant figures find the correct answer 8.31 + 10.6723 + 0.0043
The dimensions of angular velocity are
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