The principle of Occam's Razor states that
A) scientific explanations may invoke supernatural causes if no other causes are found.
B) only a model that has survived repeated observational tests deserves to be called a scientific theory.
C) no scientific theory, no matter how well tested, can ever be proved absolutely true.
D) in explaining natural phenomena, the simplest explanation consistent with the observations is to be preferred.
E) while personal biases may influence individual scientists, the process of science itself can uncover these biases.
D
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A K? x-ray corresponds to the missing electron orbital on an atom going from 1s to _________.
Fill in the blank(s) with the appropriate word(s).
The most massive part of the atom is(are) the ____ which has(have) a ____ charge
a. electrons; negative b. nucleus; negative c. electrons; positive d. nucleus; positive
A Mack truck and a Volkswagen traveling at the same speed have a head-on collision. The vehicle that undergoes the greatest change in velocity will be the
A) Volkswagen. B) Mack truck. C) same for both.
When an atom changes its energy state from n = 4 to n = 2
A) a photon is emitted. B) a photon is absorbed. C) two photons are emitted. D) two photons are absorbed. E) None of the given answers are correct.