All questions asked below are from hc verma part 1 page 273 {exercise}
1. q-1 and q-7 .why atm pressure is not used . p=p` +dgh
2.q-2 part b .plz solve it
3.q-8 part c and part e
we know torque=force *radius what is radius in these questions .
4.q-18 plz give concepts involved and solve it.