The average radiation dose received from radon in the home is ________
a. less than a dental x-ray dose.
b. comparable to that from a nuclear plant
c. very dependent upon local geology
d. larger in older homes
c
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Color perception deficiency occurs
A. Astigmatism |
B. Eye Dominance |
C. Focus |
D. Blind Spot |
E. Color Blindness |
F. Afterimages |
What is the physical difference between light and a radio wave?
A) Light waves have a higher frequency than radio waves. B) Light is an electromagnetic wave while radio is a pressure wave in air. C) Light waves have a longer wavelength than radio waves. D) Light waves have a larger amplitude than radio waves. E) None of the above.
Halley's comet has an orbital period of 76 years, what is the average distance of Comet Halley from the sun?
a. 51 AU b. 18 AU c. 114 AU d. 660 AU e. 38 AU
A compound lens is made by joining the plane surfaces of two thin plano-convex lenses of different glasses
The radius of curvature of each convex surface is 80 cm. The indices of refraction of the two glasses are 1.50 and 1.60. What is the focal length of the compound lens? A) 67 B) 69 C) 71 D) 73 E) 75