A Type Ia supernova is believed to occur when
a. the core of a massive star collapses.
b. hydrogen detonation occurs.
c. a white dwarf exceeds the Chandrasekhar limit.
d. the cores of massive stars collapse.
e. neutrinos in a massive star become degenerate and form a shock wave that explodes the star.
c
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Due to the cycle of precession, in 12,000 years, which star will replace Polaris as the guiding North Star?
a. Betelgeuse b. Sirius c. Vega d. Rigel e. Spica
A 3.000 kg ball is pitched with a kinetic energy of 20.00 Joules. Then the momentum of the ball is
A. 7.500 kg m/s. B. 8.350 kg m/s. C. 9.450 kg m/s. D. 10.95 kg m/s. E. 12.50 kg m/s.
A water-filled paper cup held in a flame will not catch fire. This is because
A) the inside of the paper is wet. B) water is an excellent conductor of heat. C) paper is a poor conductor of heat. D) the paper cup cannot become appreciably hotter than the water it contains.
A 2-L bottle of soda gives you more for your money than a 2-qt bottle would, at the same price
Indicate whether the statement is true or false