A 2.0-?F capacitor in series with a 2.0-k? resistor is connected to a 60-Hz AC source. Calculate the impedance of the circuit.
A. 1500 ohms
B. 1800 ohms
C. 2100 ohms
D. 2400 ohms
E. 8600 ohms
Answer: D
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Which of the following best describes the microstructure resulting from a eutectic reaction?
(a) Alternating grains of ? and ?-phases. (b) Grains of the ?-phase with precipitate particles of the ?-phase. (c) A volume with only ?-phase grains and another volume with only ?-phase grains. (d) The grains contain alternating plates or rods of the ? and ? phases.
If the sun's surface cooled, how would its appearance change?
A) It would appear more blue. B) It would stay the same. C) It would become bright white. D) It would appear more red.
If no net external force acts on a system, the total momentum of the system is a conserved quantity
Indicate whether the statement is true or false
A proton and an electron are both accelerated to the same final kinetic energy. If ?p is the de Broglie wavelength of the proton and ?3 is the de Broglie wavelength of the electron, then
A) ?p > ?e. B) ?p = ?e. C) ?p < ?e. D) Not enough data to answer this question.