Heavier stable nuclei tend to have
A) half as many protons as neutrons.
B) the same number of neutrons and protons.
C) more neutrons than protons.
D) no clear trend in the relative number of neutrons and protons.
E) more protons than neutrons.
C
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An eclipsing binary has been analyzed and it has been determined that the ratio of the mass of star A to the mass of star B is 6 and the total mass of the two stars is 26 solar masses. What are the masses of star A and star B?
a. Star A has a mass of 1 solar mass and star B has a mass of 6 solar masses. b. Star A has a mass of 20 solar mass and star B has a mass of 6 solar masses. c. Star A has a mass of 31.2 solar mass and star B has a mass of 5.2 solar masses. d. Star A has a mass of 22.3 solar mass and star B has a mass of 3.7 solar masses. e. The masses of star A and star B cannot be determined from the information given.
Which of the following best explains why many jovian moons have been more geologically active than the Moon or Mercury?
A) Jovian moons are made mostly of ice that can melt or deform at lower temperatures than can the rock and metal that make up the Moon and Mercury. B) The jovian moons are considerably larger than the Moon and Mercury and therefore have retained much more internal heat. C) The jovian moons probably have far more internal heat generated by radioactive decay than do the Moon or Mercury. D) Because of their greater distances from the Sun, the jovian moons receive much less heat from the Sun.
The light gathering ability of a telescope is most dependent on the diameter of its primary objective
Indicate whether the statement is true or false
Helium was first discovered in the
A) laboratory. B) upper atmosphere. C) Sun. D) island of Helios, in Greece. E) byproducts of nuclear fusion.