Hi all... I'm confused with the following question. The questions in this book are just terribly unclear.. "For the pressure gauge in Figure 6.4, what work is done by the air on the spring?" Is it asking the magnitude of the work? I think it's impossible to find the magnitude of the work since the force constant of the spring is not given... Having said that, maybe it's asking the "type of work". If so, how should I answer this question? Is it acceptable to just say: the work done on the spring is equivalent to the elastic potential energy (W = Ee = (kx^2)/2).