What is the magnitude of the phase angle of an AC series circuit that is constructed of a 10.0-W resistor along with 20.00-W inductive reactance and 7.00-W capacitive reactance?
a. 18.4°
c. 52.4°
b. 26.6°
d. 59.5°
C
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Which statement is true about Newton's first law of motion?
a. It was completely invented by Newton. b. It was an addition to and improvement of Galileo's observations. c. It was just a better way to state what Galileo had learned a long time before. d. It restated the ideas of Aristotle. e. Newton, according to legend, formulated it upon seeing an apple fall to the ground.
An iron rod becomes magnetic when
A) opposite ions accumulate at each end. B) its atoms are aligned. C) the net spins of many internal electrons are aligned. D) its electrons stop moving and point in the same direction.
To store 80 mJ of energy in a 100
F capacitor, what voltage is necessary?
A. 10 V B. 45 V C. 4.0 V D. 40 V E. more than 120
If you shine a flashlight from one wall to an opposite wall inside a spaceship drifting without acceleration far from gravitational influences, the beam of light will travel
A) in a straight-line path. B) in a parabolic path. C) along the arc of a circle.