Solution of IRODOV problem no. (1.87) by trick within very short time.

A uniform moving cricket ball is turned back by hitting it with a bat for a very short time interval. Show the variation of its acceleration with time. (Take acceleration in the back ward direction as positive).

A uniformly moving cricket balls is hit with a bat for a very short time and is turned back. Show that variation of its acceleration with time taking the acceleration in the backward direction as positive.

A hammer of mass 500g , moving at 50m//s , strikes a nail. The nail stops the hammer in a very short time of 0.01 s . What is the force of the nail on the hammer?

Ph of an aqueous solution of HCl is 5. If 1 c.c. of this solution is dilution to 1000 times. The pH will become

From the pair of linear equations for the following problems and find their solution by substitution method.(i) The difference between two numbers is 26 and one number is three times the other. Find them.(ii) The larger of two supplementary

1 M solution of CH_(3)COOH is diluted to x times so that pH of solution is doubled. Calculate x Given K_(a)=1.8xx10^(-5)

Assertion: There is no apprecible change in the position of the body during the action of the impulsive force. Reason: In case of impulsive force the time of action of the force is very short.

When a choke coil carrying a steady current is short circuited, the current in it decreases to beta(lt1) times its initial value in a time T . The time constant of the choke coil is

1 litre aqueous solution of NaCl was electrolysed bètweern Pt electrodes passing a direct current of 12.87 A for 100s with a current efficiency of 75%. Calculate pH of the solution after electrolysis assuming no change in volume of solution.