Q. An elastic cord is 64cm long when a weight of 53N hangs from it and is 88cm long while a weight of 85N hangs from it. What is the "spring" constant of this elastic cord?
Q. The fuel gage for a gasoline tank in the car reads proportional to the bottom gage pressure .if the tank is 30cm deep and accidentally contains 2 com of water plus gasoline how many centimetres of air remain at the top when gage erroneously reads full?