problem 1:
Illustrate out the risks of nuclear fissions.
problem 2:
Illustrate out the term semiconductor devices and also describe their usage.
problem 3:
In the total system approach, what are the numerous factors which must be kept in mind while planning a large dam or a thermal power station?
problem 4:
prepare down the requisites of self reliance?
problem 5:
Why do dark colours soak up heat?
problem 6:
Why is lead hazardous?