You are purchasing a refrigerator. You know that you want to keep your food at 1 deg C and that your house is typically at 19 deg C. What is the minimum power (kW) required to operate the refrigerator if the heat extracted is 297 kW?

An older refrigerator uses 4.22 kWh per day while an Energy Star refrigerator uses 0.78 kWh per day (both running continuously). What is the difference in power between the two refrigerators?  If your electricity costs $0.13 per kWh, how much money does the Energy Star refrigerator save over 5 years?

This question deals with a cylinder, which is upright. Here are the facts for the problem. Can you please help me with a clear diagram and then the right equations for net work and heat? There is a massless and frictionless piston inside the cylinder with two stops which prevent movement down the cylinder. But, the cylinder can still move upward. Under the Below the piston is 5 kg of water, 50% of which (by mass) is initially vapor at 120°C. Heat is gradually added to the water until the water reaches a final state of 400°C. The atmospheric pressure is 500 kPa. The stops don't affect the area.  (1) Draw a P-V diagram for the process, which includes the isotherms at states 1 and 2.  (2) A what temperature does the piston first lift off? At what temperature has the liquid turned to vapor? (3) What is the net work and heat transfer between the system and the surrondings between states 1 and 2. Are these transfers going into or out of the system?

The man exerts the two forces on the handle of the shovel as shown in (Figure 1). Take F₁ = 14 N and F₂=30 N. Figure Part B Determine the magnitude of the resultant moment of these forces about the blade at A. Express your answer to three significant figures and include the appropriate units. MA= Submit LO CHA Value Request Answer Units ? 69°F Mostly cloudy Next 6:23 PM 2/7/2023