According to the law of reflection, a light ray striking a mirror at an angle of incidence of 30 degrees will leaves the mirror at an angle of
a. 60 degrees.
b. 30 degrees.
c. less than 30 degrees.
d. none of the above.
b
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The surprising feature of the double-slit experiment with electrons is
A) when both slits are open, each individual electron impact on the viewing screen is spread out over a wide area. B) when both slits are open, the impact pattern on the viewing screen is an interference pattern. C) when one slit is open, the impact pattern on the viewing screen is an interference pattern, but this interference pattern vanishes when both slits are open. D) the overall pattern formed by many impacts is different each time that the experiment is performed, and is thus entirely unpredictable. E) when both slits are open, the electrons make precise, tiny impacts on the viewing screen.
In a nonlinear elastic material, the ratio of the applied stress to the total strain is the _____________modulus.
Fill in the blank(s) with the appropriate word(s).
Why are older rocks more likely to be found on the continents than on the ocean floor?
What will be an ideal response?
Nuclear Reactions: In the nuclear reaction 
K + 
H ? X + 
Ca, what is X?
A. proton B. neutron C. 2H D. 3H E. alpha particle