If someone somehow added a lot more hydrogen and helium to the Sun (say 50% more than it has now), what would happen to it?
A) Its nuclear reactions would slow down because its heavy element abundance would be relatively less.
B) It would increase in size and float away.
C) It would explode as a supernova.
D) It would cease to exist as a star because it would be too diffuse and fluffy.
E) It would begin to evolve much more quickly than it is now.
E
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According to the universal law of gravitation, if you triple the distance between two objects, then the gravitational force between them
A) increases by a factor of 9. B) decreases by a factor of 9. C) decreases by a factor of 3. D) increases by a factor of 3.
The object left behind after the 1054 AD supernova explosion has been observed at the center of the Crab nebula. The object is a
a. white dwarf. b. neutron star. c. red giant. d. protostar.
A 2.15 kg lightly damped harmonic oscillator has an angular oscillation frequency of 0.261 rad/s. If the maximum displacement of occurs when t = 0.00 s, and the damping constant b is 0.74 kg/s what is the object's displacement when t = 4.01 s?
A) 0.50 m B) 0.43 m C) 0.58 m D) 0.65 m
Which of the following produces greenhouse gases?
a. burning fossil fuel b. digestive processes in cows c. automobile pollution d. all of the above