A thick-walled metal pipe of length 20 cm has an inside diameter of 2.0 cm and an outside diameter of 2.4 cm. What is the total surface area of the pipe, counting the ends?
What will be an ideal response?
279 cm2
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Four unequal resistors are connected in a parallel with each other. Which one of the following statements is correct about this combination?
A) The equivalent resistance is less than that of the smallest resistor. B) The equivalent resistance is equal to the average of the four resistances. C) The equivalent resistance is midway between the largest and smallest resistance. D) The equivalent resistance is more than the largest resistance. E) None of the other choices is correct.
Light travels fastest in
A) warm air. B) cool air. C) a vacuum.
Are the Hawaiian Islands made up primarily of igneous, sedimentary, or metamorphic rock?
What will be an ideal response?
The ductile-to-brittle transition temperature for the 1043 steel in Figure 11.12 is approximately
(a) 225 K (b) 275 K (c) 325 K (d) 375 K