An aluminum filter is used to filter out low energy x-rays from a polychromatic x-ray beam. if the filter thickness is such that 50% of 25 kev photons are filtered out (that is, the thickness is one half-value layer, how many of these filters would we need to stack together to filter out 99% of the 25 kev photons?

For each of the following process: a) sketch the p-v diagram, b)sketch t-s diagram, c) sketch t-v diagram, d) sketch the boundary work on one of the diagrams (a, b or c) and e) sketch the reversible heat transfer on one of the diagrams (a, b or c): 1- isobaric process from compressed liquid to superheated vapor 2- isothermal process from compressed liquid to superheated vapor 3- isentropic process from compressed liquid to superheated vapor