Things you can do to help decrease global warming include: * Keep your air conditioner on high
Turn off your lights when you're not using them
Keep your freezer door open
Eat more ice cream

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.

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

An insulated 40 ft^3 rigid tank contains air at 50 psia and 120°f. a valve connected to the tank is now opened, and air is allowed to escape until the pressure inside drops to 25 psia. the air temperature during this process is kept constant by an electric resistance heater placed in the tank. determine the electrical work done during this process.