Who, in 1925, postulated that matter, as well as light, has properties of both waves and particles?
a. Planck
b. Heisenberg
c. de Broglie
d. Einstein
c
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Exclusion Principle: How many 2d electron states can an atom have?
A. 0 B. 4 C. 6 D. 8 E. 10
Glacial striations on the continental landmasses provide evidence
A) that Hawaii was once joined to Alaska. B) of the direction of Pleistocene ice flow. C) that the Cenozoic was a very cool time. D) that Baja California was once joined to Mexico.
A circuit contains two inductors of 6.0-mH inductance in parallel placed in series with an inductor of 8.0-mH inductance. After one of the 6.0-mH inductors burns out, the repairman wants to replace all three inductors with one inductor of equivalent inductance. Assuming inductors combine in series and parallel the same way resistors do, what inductance should he use?
A. 3.0 mH B. 3.4 mH C. 4.8 mH D. 11 mH E. 20 mH
An object is 50 cm from a concave mirror of radius of curvature of magnitude 60 cm. How far is the image from the mirror?
A) 19 cm B) 35 cm C) 60 cm D) 75 cm E) 120 cm