If in a double-slit experiment the wavelength of light is increased, which of the following happens to the interference pattern shown on the screen?
A)
The maxima get further apart.
B)
The maxima stay at the same position.
C)
The minima and maxima stay at the same position.
D)
The minima get closer together.
E)
The minima stay at the same position.
A
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At Chernobyl, one of the harmful radioactive isotopes was 131I, a beta emitter with a halflife of 8 days. Suppose some of this isotope is deposited on a field. What can we say about this field 40 days later?
A) It is just as radioactive as it was to begin with. B) Its radioactivity has decreased to harmless levels. C) Its radioactivity level has decreased to 1/32 of its original level. D) Its radioactivity level has decreased to 1/16 of its original level. E) Its radioactivity level has decreased to 1/64--one sixty-forth--of its original level.
The phase angle of an RLC series circuit with an inductive reactance of 200 ? and a capacitive reactance of 100 ? is 40.0°. What is the value of the resistor in this circuit?
A) 100 ? B) 119 ? C) 156 ? D) 200 ? E) 265 ?
______ navigation provides an overview of the website, and generally remains consistent from page to page.
A. Primary B. Subsidiary C. Contextual D. Adaptive
A tiny device containing many transistors, diodes, and resistors is a(n) ________
Fill in the blank(s) with the appropriate word(s).