The elapsed time between two successive crossings of the same meridian by the Sun is known as the ______________ solar day
Fill in the blank(s) with correct word
apparent
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Suppose that you wish to construct a simple ac generator with an output of 12 V maximum when rotated at 60 Hz. A magnetic field of 0.050 T is available. If the area of the rotating coil is 100 cm2, how many turns are needed?
A) 8 B) 16 C) 32 D) 64 E) 128
A filtergram is a photograph of the sun's surface made
a. in a band of wavelengths in the infrared. b. in a band of wavelengths in the ultraviolet. c. using the Zeeman effect. d. with only those photons emitted in a specific spectral line. e. none of the above
What is a typical age for a globular cluster?
A) 10 million years B) 200 million years C) one billion years D) 4.8 billion years E) 12 billion years
A 60.0-Hz AC generator with a peak voltage of 110 V drives a series RC circuit with R = 10.0 ? and C = 300 ?F. The peak current in the circuit is
A. 8.24 A. B. 8.84 A. C. 11.0 A. D. 12.4 A. E. 23.5 A.