For large mass number nuclei which are stable, the ratio of protons to neutrons is
a. equal to 1
b. greater than 1
c. less than 1
d. unrelated to the stability of nuclei
e. almost 2 to 1
C
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The Moon's angular size ________.
A. does not change as it orbits Earth B. is higher when the Moon is closer to Earth C. is larger during eclipses than at other times D. is largest at the full moon phase and smallest at the new moon phase E. None of these choices are correct.
Gamma rays can penetrate
A) air only. B) a piece of paper. C) several millimeters of aluminum. D) several centimeters of lead. E) several meters of iron.
The Garfield Thomas water tunnel at Pennsylvania State University has a circular cross-section that constricts from a diameter of 3.6 m to the test section, which is 1.2 m in diameter. If the speed of flow is 2.0 m/s in the large-diameter pipe, determine the speed of flow in the test section
a. 9.0 m/s c. 27 m/s b. 18 m/s d. 1.0 m/s
Which of the above molecules is a phenol?
A) a B) b C) c D) d E) a and d