Which of the following is not a good reason to place an observatory on a remote mountain to?
A) reduce the impact of light pollution
B) reduce the twinkling caused by Earth's atmosphere
C) allow study of infrared light
D) allow observations at ultraviolet and x-ray wavelengths
D) allow observations at ultraviolet and x-ray wavelengths
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Captain Rickard orders his starship to accelerate from rest at a rate of "1g" (accel = 9.8 m/s2). How long does it take the starship to reach one-tenth the speed of light if light travels 300. megameters/s?
What will be an ideal response?
Which scientific theory or theories of the atom agrees with all of the atomic experiments performed to date?
A) The quantum theory of the atom. B) The planetary theory of the atom. C) The Greek theory of the atom. D) Both the planetary theory and the quantum theory of the atom. E) None of the above theories agree with all of the atomic experiments performed to date.
The energy level diagram for hydrogen
The smallest energy of an absorbed photon that will raise a hydrogen atom from its ground state to its first excited state is 13.6 eV.
a.
True
b.
False
Which of the following optical elements used alone can produce a real image of an object?
A. Negative lens B. Plane mirror C. Convex mirror D. Concave mirror E. Prism