Parallel light incident on a positive lens will ________ as it emerges.
Fill in the blank(s) with the appropriate word(s).
converge
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An eclipsing binary will
a. be more luminous than a visual binary. b. also be observed as a spectroscopic binary. c. give off most of its light in the infrared. d. show a constant Doppler shift in its spectral lines. e. show two stars with variable proper motion.
An M type star 1,000 times more luminous than the Sun will be located near the ________ part of the H-R diagram.
A. bottom right B. center C. top left D. top right E. bottom left
If the input to an RLC series circuit is 
, then the current in the circuit is
A.
.B.
.?C.
.D.
.E.
.A 120-V rms voltage at 1000 Hz is applied to a 2.00-mH inductor, a 4.00-?F capacitor and a resistor. If the rms value of the current in this circuit is 0.400 A, what is the value of the resistor?
A) 299 ? B) 95.1 ? C) 423 ? D) 120 ? E) 240 ?