You are required to design a heating oven for sterilizing equipment. The oven is heated by side
heater imbedded at the mid-plan of a wall of 20 cm thick. The wall is completely insulated from
the air side. The material of the oven walls has k = 10 W/m K and the thickness of each wall
other than that mentioned is 10 cm. The top and the bottom sides of the oven are completely
insulated. The amount of heat lost from the walls should not exceed 5% of the input power to the
heater which is 2kW. In order to enhance the heat transfer from the wall where the heater is fitted
to the oven space, it is proposed to attach a number of either longitudinal or transverse fins to
this wall. The dimensions of each one of these fins as follows; its length is 15 cm and thickness
is 3mm. The fin material is aluminum with k = 150 W/m K.
The oven is cubical in shape with side length 75 cm. If the inside temperature of air inside the
oven should be 75°C and the ambient temperature of the air outside the oven varies from 25°C to
40 °C. All the heat generated by the heater is transferred normal to its wall. Assume an average
fin temperature to calculate the heat transfer coefficient from fins to the oven space. After then
use this value of h to calculate the heat transfer from single fin and then find the number of fins
required to transfer the heat, assuming adiabatic tip fin, bearing in mind that heat is also
transferred from bare area of the wall where the fins are attached.

Read the following conclusion for an essay that claims that extreme sports should be more highly regulated because they are too dangerous: whether it is a high level of physical exertion, or extra doses of the "fear factor," it is common for extreme athletes to beat at the door of fate. it is these people who tempt their own mortality, while curious onlookers wait anxiously for the outcome, who must be protected from themselves. which statement provides the most accurate evaluation of the paragraph? a. the closing statement is unsatisfying b. the passage introduces new evidence. c. the thesis is not restated. d. the style is informal and inconsistent.

Will anyone be able to check for grammatical errors and give an opinion on the essay itself? write about the following topic: some people believe that allowing children to make their own cholces on everyday matters (such as food, clothes and entertainment) is likely to result in a society of individuals who only think about their own wishes. other people believe that it is important for children to make decisions about matters that affect them. discuss both these views and give your own opinion. —— nowadays, in this busy and fast developing world teaching children from an early age to cope with their own decisions (such as food, clothes etc.) and then take the coincidences after that is something that a lot of people believe that it is important for them. on the other hand other people think that it might end up in a society of humans who put their wishes before anyone else's. but which one of these views will predominate? firstly, the people who allow their children to make their own decisions are the people who everyone should look up to. it is important to let your children learn from the mistakes their make. the parents can not be with them all the time every day and for that reason, teaching them to deal with their decisons or even problems will them in the future. of course, there are always disadvantages such as some people may really forget about that their children will need them at a certain point in life and may loose connection whit them. but that is why it should have that moderately path, where kids will make their own decisions but will feel comfortable to always ask for a advice tueur parents. on the other hand, there are and the second type of parents which think that too much individualism is not good. it really depends on the parents how they will teach their children to carry on with the independence they have. a lot of them might forget that they are still kids and will need and advices from time to time and because of that the parents turn their kids in individuals who only think about their own wishes due to the fact that they are let on their own and have to cope with everyone and everything by themselves. in conclusion, i think that the best decision someone can make is to look up to the first type of parents. that way they will be able to train their children to become independent people who will respect the wishes of others and they will be able to cope with their decisions in the future when they need it.

Read the excerpt from chapter 18 in frankenstein. alas! to me the idea of an immediate union with my elizabeth was one of horror and dismay. i was bound by a solemn promise which i had not yet fulfilled and dared not break, or if i did, what manifold miseries might not impend over me and my devoted family! could i enter into a festival with this deadly weight yet hanging round my neck and bowing me to the ground? i must perform my engagement and let the monster depart with his mate before i allowed myself to enjoy the delight of a union from which i expected peace. examine this excerpt to analyze the way the author’s choice of words adds to the meaning and impacts the tone of this portion of frankenstein. what does victor mean when he talks about “this deadly weight yet hanging round my neck and bowing me to the ground”? how do these words affect the tone at this point in the story? use examples and evidence from the text to support your analysis. frankenstein chapter 18