Liquefied petroleum gas (LPG), commonly known as propane (C3H8) is a combustible hydrocarbon based fuel. It comes from refining crude oil and natural gas. At normal pressure and temperatures above -44°F propane remains in its gaseous form. At higher pressures and/or lower temperature propane will become liquid.
A) At what temperature does pure propane boil at 50 psia?

An engine, weighing 3000 n, is supported on a pedestal mount. it has been observed that the engine induces vibration into the surrounding area through its pedestal at the maximum operating speed. determine the stiffness of the dynamic vibration absorber spring in (n/m) that will reduce the vibration when mounted on the pedestal. the magnitude of the exciting force is 250 n, and the amplitude of motion of the auxiliary mass is to be limited to 2 mm note: in this question type-in right numbers, no decimals, no fractions, no unit. approximate to right number if needed