Passive residential solar water heating systems rely on municipal water pressure or ____________________ to circulate the HTF.
Fill in the blank(s) with the appropriate word(s).
convection
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When a specification is general and applies to all or several views, it may be placed within a ruled space called a(n) ____________________ block.
Fill in the blank(s) with the appropriate word(s).
How have newer versions of the check valve been modified?
A) They are now part of metering devices. B) The metering devices are now inside the check valves. C) They are now insulated. D) One check valves can now connect to two metering devices.
(a) Explain why stretching an elastomer causes an unstable state and, therefore, when the stretching force is removed, why the elastomer recovers. (b) Explain why stretching of some polyethylene molecules results in "blushing" a situation not eliminated when the stretching force is removed
What will be an ideal response?
You are asked to specify the material for an extremely large part. The boss says he wants a high MI material. Why would this be beneficial, and what effect would the choice have on material properties? (Density, impact resistance, tensile and flexural properties, etc.)
What will be an ideal response?