List some advantages of using a photodetector.
What will be an ideal response?
Photodetectors do not have to make physical contact with the object they are sensing, so there is no mechanical arm to wear out. Many photodetectors operate at speeds that cannot be tolerated by mechanical contact switches. They are used in almost every type of industry, and their uses are increasing steadily.
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Which statement about the extent of reaction (?) is true?
A. Each product and reactant in a reaction has a unique ? associated with it. B. The sign of ? alone indicates if the substance is a product, reactant or both. C. The ? of a reaction can also be expressed on a time basis. D. ? is unitless. E. ? divided by ? is the measure of reaction completion.
Conductors connected to the high leg of a four-wire delta system be color-coded with what color of insulation or tape?
a. Red b. Green c. Orange d. Blac
Why are suction-to-liquid line heat exchangers used on refrigeration systems?
What will be an ideal response?
How can you use remove garbage files from your system?
What will be an ideal response?