Fins, or extended surfaces, are commonly used in a variety of engineering applications to enhance cooling. Common examples include a motorcycle engine head, a lawnmower engine head, heat sinks used in electronic equipment, and finned-tube heat exchangers in room heating and cooling applications. For long fins, the temperature distribution along the fin is given by the exponential relationship:
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Match each postwar American program below with its primary purpose. A. Point Four 1. assist communist-threatened Greece and Turkey B. NATO 2. promote economic recovery of Europe C. Truman Doctrine 3. aid underdeveloped nations of Latin America, Asia, and Africa D. Marshall Plan 4. resist Soviet military threat
A. A-4, B-1, C-3, D-2 B. A-2, B-3, C-1, D-4 C. A-1, B-2, C-4, D-3 D. A-3, B-4, C-1, D-2 E. A-4, B-3, C-2, D-1
Richard Nixon's “Checkers” speech, during the 1952 presidential campaign
A. was an eloquent, sincere appeal that demonstrated Nixon's ethical seriousness. B. demonstrated the new power of television and kept him on the Republican ticket with Dwight Eisenhower. C. demonstrated the limitations of the power of television to save the ethically challenged and maudlin Richard Nixon from being cast into political oblivion. D. led Dwight Eisenhower to tone down Nixon's attacks on Democrats for being soft on communism. E. proved that Nixon had the political skills and leadership to become president if necessary.
Livestock are homeotherms and maintain constant body temperature.
Answer the following statement true (T) or false (F)
Which of the following is true of shaded-pole motors?
a. They are small, inexpensive, and powerful. b. They have a low starting torque, a low efficiency, and a high noise level. c. They have a lower line current, are higher efficiency, and are very quiet. d. They have a larger current, a lower total impedance, and a higher reactance.