Thin Films: The colors on an oil slick are caused by reflection and
A. diffraction.
B. interference.
C. refraction.
D. polarization.
E. ionization.
Answer: B
Physics & Space Science
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An electric iron uses 8.0 A of current and has a power rating of 1100 W. The resistance of the iron is
A. 138 Ohms. B. 17 Ohms. C. 0.0072 Ohms. D. 8800 Ohms.
Physics & Space Science
A surprising demonstration involves dropping an egg from a third-floor window to land on a foam-rubber pad 2 in (5 cm) thick without breaking. If a 56-gram egg falls 12 m, and the foam pad stops the egg in 6.25 ms, by how much is the pad compressed?
Physics & Space Science
The decay: n ? p + e- + ve does not occur as it would violate conservation of
A) baryon number. B) mass. C) charge. D) lepton number. E) angular momentum.
Physics & Space Science
The symbol for lead is
a. Pb. b. La. c. Li. d. Xe.
Physics & Space Science