What current is flowing in a resistor if 4.0 × 1016 electrons pass a point in the resistor in 0.50 s? (e = 1.60 × 10-19 C)
A) 0.013 A B) 78 A C) 0.31 A D) 6.3 A
A
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An ideal gas is expanded isothermally from 20 L to 30 L. During this process, 6 J of energy is expended by the external mechanism that expanded the gas. Which of the following statements is correct?
A) 6 J of energy flow from surroundings into the gas. B) 6 J of energy flow from the gas into the surroundings. C) No energy flows into or from the gas since this process is isothermal. D) None of the above statements is correct.
Repeat the problem posed in Problem 39, but compare to nuclear generation of electricity
What will be an ideal response?
Which one of the following processes of heat transfer requires the presence of a fluid?
a. conduction c. convection b. radiation d. None of the choices are valid.
The celestial equator is
a. a great circle. b. coplanar with the terrestrial equator. c. perpendicular to lines of right ascension. d. all of the above.