A series RC circuit has a time constant of 0.900 s. The battery has an emf of 24.0 V, and the maximum current in the circuit is 0.500 mA.What is the capacitance?
a. 1.80 ?F
b. 43.2 ?F
c. 18.8 ?F
d. 53.3 ?F
c
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A decoration, of mass M, is suspended by a string from the ceiling inside an elevator. The elevator is traveling UPWARD with a constant speed. The tension in the string is
A) greater than Mg. B) less than Mg. C) equal to Mg. D) impossible to tell without knowing the speed. E) impossible to tell without knowing the decoration mass.
A _________ wave is one with its oscillations perpendicular to the direction of propagation
Fill in the blank(s) with correct word
An electron is released from rest at the negative plate of a parallel plate capacitor. If the distance between the plates is 5 mm and the potential difference across the plates is 5 V, with what velocity does the electron hit the positive plate? (me = 9.1 × 10?31 kg, qe = 1.6 × 10?19 C.)
What will be an ideal response?
Which of the following best describes what we mean by the universe?
A) a vast collection of stars that number as many as the grains of sand on all the beaches on Earth B) the sum total of all matter and energy C) all the galaxies in all the superclusters D) The universe is another name for our Milky Way Galaxy.