If action is always equal to the reaction, explain how a horse can pull a cart.

Taking the example of Daniel cell reaction show with the help of Nernst equation how the equilibrium constant value for the cell reaction can be obtained.

A boy standing on a stationary lift (open from above) throws a ball upwards with the maximum initial speed he can, equal to 49 m/s. How much time does the bail take to return to his hands? If the lift starts moving up with a uniform speed of 5 m/s and the boy again throws the ball up with the maximum speed he can, how long does the ball take to return to his hands?

In how many ways can a selection of 4 be made from 10 persons such that one particular person is always included

In how many ways can a selection of 4 be made from 10 persons such that one particular person is always excluded?

How can you convert an amide into an amine having one carbon less that the starting compound: Name the reaction.