The supercontinent of Pangaea formed during the
A) Cenozoic.
B) Paleozoic.
C) Mesozoic.
D) Precambrian.
Answer: B
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In each of the following situations, point charge q moves in a uniform magnetic field B. The strength of the magnetic field is indicated by the density of field lines. In each situation, the initial speed v of the charge is the same. For which situation(s) will the charge q have the largest displacement in a certain time T?
According to quantum theory, the electron in a particular quantum state of the hydrogen atom has
A) a definite position. B) a definite energy. C) a definite velocity. D) All of the above. E) None of the above.
In ultrasound the wavelength of the sound is much smaller than in normal sound
a. True b. False Indicate whether the statement is true or false
A kilometer contains 1 million meters
Indicate whether the statement is true or false