Must acupuncture be responsible for the patients' recovery?
A) No. Acupuncture may be responsible for the healing, or it may not. Correlation does not necessarily imply causation.
B) Yes. If the study was run by qualified M.D.s, then we should respect their findings that acupuncture cured these patients.
C) No. Acupuncture is hippie, new age stuff, and is not respected by reputable doctors.
D) Yes. The patients stated afterwards that they knew it had helped, and these people know their own bodies better than we do.
A
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If the wave function for a free electron is given by ? = A sin kx + B cos kx, and the electron has a speed of 5.2 x 106 m/s, what is the value for k?
A) 1.9 x 10-7 m-1 m-1 B) 1.2 x 10-6 m-1 C) 7.2 x 109 m-1 D) 4.5 x 1010 m-1 E) 3.8 x 1011 m-1
The algebraic sum of the changes of potential around any closed circuit loop is
a. zero. b. maximum. c. zero only if there are no sources of emf in the loop. d. maximum if there are no sources of emf in the loop. e. equal to the sum of the currents in the branches of the loop.
According to our present theory of solar system formation, how did Earth end up with enough water to make oceans?
A) The water was brought to the forming Earth by planetesimals that accreted beyond the orbit of Mars. B) The water was mixed in the other materials in the planetesimals that accreted at our distance from the Sun. C) The water was formed by chemical reactions among the minerals in the Earth's core. D) Earth formed in the relatively narrow region of the solar nebula in which liquid water was plentiful.