Physics
(i) Name the physical quantity which is measured in calories.
(ii) How is calorie related to the S.I. unit of that quantity?
Related Questions
The diagram below shows a claw hammer used to remove a nail:
(i) To which class of lever does it belong ?
(ii) Give one more example of the same class of lever mentioned by you in (i) for which the mechanical advantage is greater than one.
Two bodies A and B have masses in the ratio 5:1 and their kinetic energies are in the ratio 125:9. Find the ratio of their velocities.
(i) Define couple.
(ii) State the S.I. unit of moment of couple.
(i) Define critical angle.
(ii) State one important factor which affects the critical angle of a given medium.