Helium (He), a monatomic gas, fills a 0.010-m3 container. The pressure of the gas is 6.2 105 Pa. How long would a 0.25-hp engine have to run (1 hp 746 W) to produce an amount of energy equal to the internal energy of this gas? *
Ch.9:CenterofMassandMomentum A. ChapterGoals • Studyofwhatiscenterofmass • Studyofwhatislinearmomentumandwhenitconserves • StudyofwhatisImpulseandwhatisimpulse-momentum theorem • Studyofwhatiscollisionandwhatareelas▯c,inelas▯c, andperfectinelas▯ccollisions • Studyofwhatthemechanismforrocketpropulsion Ch.9:CenterofMassandMomentum B.CenterofMass(COM) • Thecenterofmassofasystemofpar▯clesisthepointthat movesasthough(1)allofthesystem’smasswere concentratedthereand(2)allexternalforceswereapplied there. • Figureshowsthemo▯on ofabaseballbatandits centerofmass(blackdot). Ch.9:CenterofMassandM
