Chapter 1, Problem 1.1DP

A microwave dinner has the instructions listed below. In this problem, you will explain how following the instructions affect the heat transfer into the meal. (The meal starts off frozen, and is covered with a thin piece of plastic "film" or covering when it is taken out of the box. The vegetables are separate from the beef and potatoes.) Instructions1. Cut slit in film over vegetables.2. Microwave on high 4 minutes3. Turn back film from beef and potatoes. Stir beef and potatoes. Replace film. Return tray to microwave oven4. Microwave on high 3 minutes.5. Let stand 2 minutes in microwave oven., Stir beef and potatoes.a. How does each of the steps above (cut slit in film, stir beef and potatoes, etc) affect the heat transfer to the food? Make sure to consider conduction, convection, and radiation where appropriate. b. The instructions ask you to stir the beef and potatoes, but not the vegetables. From this, what can you tell about how each type of food receives and transfers heat?…

Project 3: It is vital to optimize the heat loss from a house through well designed composition and proper selection of the insulation layer of the wall layers. Your role as a thermal power engineer to investigate the heat transfer performance of a composite walls. Your head of department asked you to analyze the composite walls structure in Figure.3 and determine the steady rate of heat transfer and total heat loss, if the following design specifications must be met: _Indoor room temperature must be maintained at 20??. − Outdoor temperature mostly is -10?? in a hard winter. − Wall is made of plywood with thermal conductivity constant of ?? = 0.115 ?/(?.?) . − Fiberglass insulation is used with thermal conductivity constant of ?? = 0.045 ?/(?.?) . − Plaster board is used as inner layer for decoration purpose with thermal conductivity constant of ?? = 0.27 ?/(?.?) . − Convection heat transfer coefficients for indoor and outdoor are ℎ?? = 34 ?/(?2.?) and ℎ?? = 65 ?/(?2.?) , respectively.…

Jack Jokely got up late one morning and was trying to find a clean pair of socks. He has a total of six pairs (3 manroon and 3 white) in his drawer. Jack is not a very good housekeeper and his socks were just thrown in his drawer and, to make the morning perfect, the lightbulb is burned out so he can't see. How many socks does he have to pull out of the drawer before he gets a matched pair (two maroon socks or two white socks)?

(a) In thermal systems design projects various cost estimation methods can be followed depending on the nature of the project. Discuss at least four costing methods that can be applied in the thermal systems design and compare the strength and weakness of each method. (minimum 250 words).  (b) Which method of costing do you think is appropriate for your thermal system design project? Discuss your justifications why you prefer the particular cost estimation method.  (c) In the design process of air conditioning systems discuss the key steps you should carry out before production and installation of the system.

I need answers with clear hand writing or using Microsoft word . ASAP   INTRODUCTION: for (HEAT TRANSFER THROUGH COMPOSITE WALLS)   note: i want a lot of information

Consider a heat transfer situation. Heat flows from the hot item or area to the cold item or area. Describe this in terms of spontaneity.

what is the unit of the medium resistance and the specific cake resistance

Mechanical Q What are the fundamental principles, advanced technologies, and significant challenges that engineers encounter when designing highly energy-efficient HVAC (Heating, Ventilation, and Air Conditioning) systems for large-scale commercial buildings, and how can these systems contribute to sustainability and energy conservation on a broader scale

A metal spoon and a wooden spoon are left overnight in a room.  Why do we feel colder when we touch the metal spoon than when we touch the wooden one? a. Since metals usually have a lower heat capacity than non-metals, the metal spoon loose more heat to the room and consequently has a lower temperature b. Metals release heat faster than non-metals because of their higher thermal conductivity c. This is merely psychological since we are conditioned to think of metals as “cold” d. Metals absorb heat faster than non-metals because of their higher thermal conductivity