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It is commonly recommended that hot foods be cooled first to room temperature by simply waiting a while before they are put into the refrigerator to save energy. Despite this commonsense recommendation, a person keeps cooking a large pan of stew twice a week and putting the pan into the refrigerator while it is still hot, thinking that the money saved is probably too little. But he says he can be convinced if you can show that the money saved is significant. The average mass of the pan and its contents is 5 kg. The average temperature of the kitchen is 20°C, and the average temperature of the food is 95°C when it is taken off the stove. The refrigerated space is maintained at 3°C, and the average specific heat of the food and the pan can be taken to be 3.9 kJ/kg ?c °C. If the refrigerator has a coefficient of performance of 1.2 and the cost of electricity is 10 cents per kWh, determine how much this person will save a year by waiting for the food to cool to room temperature before putting it into the refrigerator.
Difference Equations: Solve the following difference equation using recursion by hand (for n=0 to n=4)
What brittle rock is, and what ductile rock is, and how the brittleness would impact fracturing treatment of tight reservoirs - identify if the rocks in the formation are brittle or ductile. Or where the rock indicates brittle characteristic and w..
1. if 8000m3d of wastewater from an industry has a bod5 of 190 mgl and k 0.17 per day base 10a. how much oxygen kgday
Describe a time when you spotted an opportunity and made it happen- What was the situation? Industrial Engineering Job application questions
Companies or corporations typically offer paid vacation and sick leave; where is this money calculated in your invoices to the clients?
Atmospheric air at 10°C enters the exchanger with a volumetric flow rate of 1.0 m3/s. The convective heat transfer coefficient on the tube outer surfaces is 400 W/m2·K. Estimate the fluid outlet temperatures.
this is a debating question prepare a report defending your position either for the affirmative or the negative.the
Does the following game has pure strategy nash equilibrium? Does it has mixed strategy nash equilibrium - How many units should Green Thumb manufacture for sale? What is the expected profit from this policy?
Demonstrate effective communication by composing writing that communicates ideas, meaning and/or argument in a format that broadly follows conventions in the information systems field.
What is the fastest line speed at which a host can blast out 1500-byte TCP payloads with a 120- sec maximum packet lifetime without having the sequence numbers wrap around?
Justify a need for digital forensics methodology and consider scope of the case including nature of alleged misconduct leading to consideration of how electronic and digital evidence may support the investigation.
How to arrange the office hours for EMGT 365 for the next semester. He will have two teaching assistants (TAs). He is considering two options
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