What inductance must be put in series with a 200-? resistor at 4000 Hz to have a total impedance of 240 ??
A) 3.28 mH
B) 4.28 mH
C) 5.28 mH
D) 6.28 mH
E) 12 mH
C
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What will be an ideal response?
If you were to unscrew bulb B from its socket (effectively removing it from the circuit and leaving a gap in its place), bulb A would
A. get brighter. B. become dimmer. C. remain at the same brightness. D. go out.
To create the above spectra, which of the following is NOT true?
a. A dense gas is excited and the light produced is over all wavelengths.
b. A low-density gas is excited and the light produced is over discrete wavelengths.
c. Light from a low-density gas passes through a warm, dense gas and the light that is produced is at all wavelengths except for a few discrete wavelengths.
d. All of the other choices are not true.
Galaxies with disks but no evident spiral arms are called
A) irregular galaxies. B) lenticular galaxies. C) barred spiral galaxies. D) spheroidal components.