Consider a fluid whose volume does not change with temperature at constant pressure. What can you say about natural convection heat transfer in this medium?

What will be an ideal response?


There cannot be any natural convection heat transfer in a medium that experiences no change in volume with temperature.

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Increasing an injector's on time ____________________ the amount of fuel delivered to the cylinders.

Fill in the blank(s) with the appropriate word(s).

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A(n) ____________________ is a pure element or compound that allows electricity to flow freely.

Fill in the blank(s) with the appropriate word(s).

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The unijunction transistor (UJT) is generally classified with a group of devices known as ____.

a. thermistors b. triacs c. thermostats d. thyristors

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Your brother, a new college graduate, wants to be his own boss. He wants to open a restaurant in a small strip center or acquire and operate a food truck, an increasingly popular mode of eating, es­pecially in larger cities. The restaurant space can be rented for $2200 per month. Modest furnishings and used equipment will have a first cost of $26,000. Income is expected to be $14,100 per month, with expenses for utilities, labor, taxes, etc. expected to average $3700 per month. Alterna­tively, a kitchen-ready food truck will cost $17,900 to purchase and $900 per month to operate. In­come is expected to be $6200 per month. If the salvage values are assumed to be 10% of the first cost for the restaurant and 35% of the first cost of the truck after a 5-year planning period, which

al­ternative is better on the basis of an annual worth comparison at an interest rate of 12% per year, compounded monthly? Also, write the spreadsheet functions to find the AW values. What will be an ideal response?

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