A.A
B.B
C.C
D.D
E. Toward the viewer
F. Away from the viewer
T. The field is zero.
T. The field is zero.
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Refracting Telescope: The objective lens of a refracting astronomical telescope has a focal length of 60 cm, and the eyepiece has a focal length of 2.0 cm. How far apart should the lenses be placed in order to form a final image at infinity?
A. 44 cm B. 58 cm C. 76 cm D. 60 cm E. 62 cm
As you approach a steady light source, the wavelength of the emitted light appears
A) longer. B) shorter. C) the same.
Which recording formats employ magnetism?
a. videotape b. CD c. DVD d. floppy disk
A circuit consists of an AC audio amplifier, a resistor, and a speaker, all in series. The amplifier puts out an alternating voltage of 16.0 V (rms), the resistance of the resistor is 10.0 ?, and the speaker has a resistance of 11.9 ?. What is the time-averaged power delivered to the speaker?
a. 21.5 W b. 30.5 W c. 6.35 W d. 8.69 W