The coefficient of performance of an air conditioner is 8.5. If the air conditioner requires 5.6 MJ of mechanical energy per hour, what is the heat expelled outside during 1 hour

The momentum of an isolated system is conserved a) only in inelastic collisions. b) only in elastic collisions. c) in both elastic and inelastic collisions

What is the role of lenses in microscopy?

When electrons are added to the outermost shell of a carbon atom, it forms--an anion that has a larger anion that has a smaller cation that has a larger cation that has a smaller radius.