As the temperature surrounding a self-regulating heating cable increases, the _____.
a. conductive core of fibers contracts
b. electrical resistance decreases
c. electrical current increases
d. electrical resistance increases
d. electrical resistance increases
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The general dimensioning symbol for radius is a(n) ____________________.
Fill in the blank(s) with the appropriate word(s).
The cause of the plague was mostly likely
a. Yersinia Pestis. b. typhus. c. leprosy. d. swine flu.
Nine old, 12-ft^2 windows with a U-value of U = 1.2(Btu/h?ft^2??) were replaced with new windows having U = 0.3(Btu/h?ft^2??) . Calculate the energy savings on a day during a five-hour period when Tin = 68? and Toutside = 10?.
What will be an ideal response?
The diodes in half-wave and full-wave rectifiers should be operated at ____ of their rated value to allow for changes in the input voltage.
A. 20% B. 40% C. 60% D. 80%