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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.
Analysis of the vehicle component: role, work conditions, requirements for the role and
Work on your proposal for the new system.Identify a specific system that would help improve Riordan's business. Define the system's business requirements.
write just an introduction and methodology about Consolidation Test Experiment,
Explain how one heat treatment process and two other treatment processes affect the structure, properties and behaviour of the parent material
For the purposes of this experiment, we will assume this anti-alias filtering is to be done using a recursive low pass filter derived from the Butterworth analogue prototype (using the bilinear transformation).
GIS study for a place called Brookley Field, Mobile, Alabama ( Go Google maps).
Calculate the present equivalent value of the machine and the contribution to the cost of processing the material, per kg, resulting from the capital cost of the machine.
Preparation is the key to giving an effective presentation and to controlling your nervousness. Know your topic well. You will be the expert on the topic in the classroom
When was the mouldboard plough invented and by who. also, what exactly is it.
The primary focus of the team is to research and assess the issues associated with a specific emerging technology. The historical development and context of the technology
Derive at least four concept designs to satisfy the given specification. Use short written descriptions and simple sketches to illustrate your ideas and what other information would be required to be able to write a more complet..
What are the five (5) fluids used as damping media. Calculate the logarithmic decrements of the beam in these five fluids. Calculate the damping ratio of these five fluids and rank them from the highest to the lowest.
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