Correct answer
E. more than 4000
Explanation
The correct answer is more than 4000.
The natural solid fuels are : ________?
A steam pipe is to be insulated by two insulating materials put over each other. For best results________?
True stress-strain curve for materials is plotted between________?
Air injection in I.C. engines refers to injection of________?
For S.H.M. cam, the acceleration of the follower at the ends of the stroke and aimidstroke respectively, is________?
In triggering fission, which type of neutrons are more effective________?