Your refrigerator stopped working, and your family is shopping for a new one. One refrigerator costs $460 and is estimated to use
468 kW. h per year. A similar, Energy Star® refrigerator costs $546
but uses 365 kW. h per year. What is the yearly cost of using each
one? How many years would you need to use the Energy Star®
refrigerator to make up the difference in cost?

It is may 5 and you are somewhere in the northern hemisphere. if you determine that the noon sun is 51 degrees above your southern horizon, what is the latitude of your location

In a given chemical reaction, the energy of the products is greater than the energy of the reactants. which statement is true for this reaction?

Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)