X-rays may be correctly regarded as
A) high frequency sound waves.
B) high frequency radio waves.
C) both of these
D) none of these
Answer: B
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a. 1 pc. b. 10 pc. c. 100 pc. d. 1000 pc. e. 10,000 pc.
The proton is a member of the ________ family of particles.
Fill in the blank(s) with the appropriate word(s).
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What will be an ideal response?
An electron orbiting a hydrogen atom in the second energy level drops down a level, and a photon is emitted. What is the frequency of the photon? (Planck's constant, h, should be in units of eV.)