A well 20m deep and 3m in diameter contains water upto a depth of 14 m. How long will a 5 hP. engine take to empty it ?

A substance with initial concentration 2M follows zero order kinetics with rate constant 2 xx10^-2Msec^-1 . How long will this reaction take to go to completion ?

A truck starts from the speed from rest with an acceleration 1.5m/s^2 while a car 150m behind starts from rest with an acceleration of 2m/s^2 . How long will it take before both the truck and car side by side and how much distance is travelled by each ?

A tank of 2xx2xx3 is to be filled with water from a well of average depth 10 m. The work done will be

A steel wire of length 1 m and diameter 0.2mm is elongated by 1mm due to a weight of 3.14kg. The Young's modulus of steel wire is

The rate constant for a reaction of zero order of A is 0.0030" mol L"^(-1)" s"^(-1) . How long will it take for the initial concentration of A to fall from 0.10 M to 0.075 M?