A suitcase has mass of 4.1 kg and sits on a counter 1.8 m high in the airport. How much gravitational potential energy does it have?

What term do psychologists use to designate our personal awareness of feelings, sensations, and thoughts?

In a system, when potential energy decreases, then entropy also decreases. true false

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.