In the final phases of its "life", our sun will
A) collapse to become a white dwarf.
B) turn into a cockroach.
C) blow up in a supernova explosion.
D) pass through the white dwarf state, then the neutron star state, and finally the black hole state.
E) collapse and continue to collapse, forever.
A
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Steven Weinberg, Abdus Salam, and Sheldon Glashow shared the 1979 Nobel Prize in physics for their development of a(n)
a. electroweak theory. b. GUT. c. quark theory. d. generalized theory of relativity. e. theory of strangeness.
Ideal Gas Law: A car starts out when the air temperature is 288 K and the absolute (total) air pressure in the tires is 500 kPa. After driving a while, the temperature of the air in the tires increases to 298 K. What is the pressure in the tires at that point, assuming their volume does not change?
A. 129 kPa B. 483 kPa C. 507 kPa D. 517 kPa E. 532 kPa
Tycho Brahe's contribution to astronomy included:
a. Tycho Brahe's contribution to astronomy included: b. inventing the telescope. c. proving that Earth orbits the Sun. d. collecting data that enabled Kepler to discover the laws of planetary motion.
Why is there a two-day difference in the sidereal and synodic months?
A) The Moon speeds up at perigee, and slows down at apogee. B) The sidereal day is four minutes shorter than the solar day, and it adds up. C) The Earth is closer to the Sun during the sidereal month. D) The Earth is also revolving around the Sun, so the Moon must "catch up." E) The Moslem lunar year is only 354 days long, on average.