Determine the rms voltage drop across the resistor in the circuit
a.
55 V
b.
77 V
c.
9.9 V
d.
5.5 V
e.
61 V
a
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A sound source is placed in the center of a very wide and long room that has a low ceiling. Assume that the ceiling and floor are constructed of a material that absorbs the sound completely. In this situation, how would the intensity of the sound heard vary if a person moves from a distance of 10 meters from the source to a distance of 20 meters from the source?
1.The sound would have about ¼ the intensity 20 m from the source that it has 10 m from the source. 2.The sound would have about ½ the intensity 20 m from the source that it has 10 m from the source. 3.The sound would have about the same intensity 20 m from the source that it has 10 m from the source. 4.The sound would have about twice the intensity 20 m from the source that it has 10 m from the source.
A problem with the classical theory for radiation from a blackbody was that the theory predicted too much radiation in the ________________ wavelengths.
A. ultraviolet B. visible C. infrared D. microwave E. radio
Diffraction intensities occur when _________law of diffraction is obeyed.
Fill in the blank(s) with the appropriate word(s).
The colors seen on the shiny side of a CD or DVD are due to
A. Simple reflections of light B. Colors embedded in the shiny coating C. Diffraction due to the holes in the coating D. Reflections from both surfaces of the disk.