In typical globular clusters, the brightest stars are ________
Fill in the blank(s) with correct word
red giants
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A series LRC circuit consists of a 12.0-mH inductor, a 15.0-µF capacitor, a resistor, and a 110-V (rms) ac voltage source. If the impedance of this circuit is 45.0 ? at resonance, what is its impedance at a frequency twice the resonance frequency?
What will be an ideal response?
When a 47-?F capacitor is attached to an AC source, its capacitive reactance is 42.0 ?. If instead a 150-?F capacitor is attached to the same source, what will be its capacitive reactance?
a. 75 ? b. 23 ? c. 130 ? d. 13 ? e. 2.1 ?
What is the magnitude of the magnetic force on a charged particle (Q = 5.0 mC) moving with a speed of 80 km/s in the positive x direction at a point where Bx = 5.0 T, By = -4.0 T, and Bz = 3.0 T?
a. 2.8 N b. 1.6 N c. 1.2 N d. 2.0 N e. 0.4 N
If a number in powers-of-ten notation is written as just the number 10 and the exponent, what is assumed to be part of the number?
a. Nothing. b. The number 1 multiplied by 10 to the exponential power. c. The number 10 multiplied by 10 to the exponential power. d. The minus sign for the case of a negative number. e. Some unknown number to multiply times 10 to the exponential power.