The Algol paradox is explained by considering
a. the degenerate nature of the hydrogen on the surface of the white dwarf.
b. synchrotron radiation.
c. the rate of expansion of the shock wave inside the supernova.
d. the rotation rate of a neutron star.
e. mass transfer between the two stars in a binary system.
e
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The Moon's huge Mare Orientale basin has a twin on Mercury named:
A) Galileo. B) Caloris. C) Mare Marineris. D) the weird terrain. E) Valhalla.
The redshifts of the galaxies imply that the Universe is expanding and that we are at the center
a. True b. False Indicate whether the statement is true or false
The "law of heat engines" is one form of
A) the law of inertia. B) the ideal gas laws. C) the second law of thermodynamics. D) idiocy. E) the law of conservation of energy.
Which of the following best describes natural selection?
A) It is the idea that organisms with genetic traits that improve their ability to reproduce are more likely to pass those traits on to future generations. B) It is the idea that the strong survive and the weak die off. C) It is a guess made by scientists about how life develops, but it has no hard evidence to support it. D) It is the idea that organisms naturally increase in complexity and intelligence with time.