Oil costs $1.24 per gallon and is rated at 130,000 btu per gallon. the boiler efficiency is assumed to be 75 percent. the steam required is 20 pounds per hour per ton of refrigeration produced, and the heat required to evaporate water is 950 btu per pound. assume the electrical requirements to be 0.03 kw per ton and the cost to be $0.06 per kwh. what is the operating cost in dollars per ton per hour due to electricity usage?

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

First answer marked as brainiest which is the correct equation describing the first law of thermodynamics? a) when the internal energy of a system changes, it equals the amount of heat added plus the work done. b) when work is done by the piston, it is equal to the heat added plus the change in internal energy of the system. c) when heat is added to the system, it is equal to the amount of work done by the piston plus the change in internal energy of the system.

If the pressure in a gas is doubled while its volume is held constant. true or false