What is the difference between the upstream velocity and the free-stream velocity? For what types of flow are these two velocities equal to each other?
What will be an ideal response?
Heat transfer through a fluid is conduction in the absence of bulk fluid motion, and convection in the presence of it. The rate of heat transfer is higher in convection because of fluid motion. The value of the convection heat transfer coefficient depends on the fluid motion as well as the fluid properties. Thermal conductivity is a fluid property, and its value does not depend on the flow.
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The reason that many spring bulbs do not grow well in the southern United States is:
A) winter temperatures are too warm to initiate flowers. B) the photoperiod is too short in the summer to initiate flowers. C) summer temperatures are too warm to initiate flowers. D) the photoperiod is too long in the winter to initiate flowers.
To develop a(n) ____________________ drawing, an orthographic view of the object is first drawn that best describes the shape and shows the most detail of the object.
Fill in the blank(s) with the appropriate word(s).
What statement about central station fire alarm systems is true?
A. Are owned and operated by the property owner of the protected premise B. The central station must be located in the same state as the protected premise C. The central station must be listed and approved by a recognized testing agency and the AHJ D. Central stations will only provide service to individual clients
An additional layer of ____ gives the IGBT the ability to handle the high current and power requirements of the traditional power BJTs and power MOSFETs.
a. P-type material b. N-type material c. insulation d. channeling