Find the average density of a white dwarf star if it has a mass equal to that of the sun (2.0 × 10^30 kg) and a radius equal to that of the Earth (6.4 × 10^6 m)
a. 9.0 × 10^6 kg/m3
b. 1.8 × 10^7 kg/m3
c. 1.8 × 10^9 kg/m3
d. 3.6 × 10^10 kg/m3
e. 9.0 × 10^7 kg/m3
c
You might also like to view...
Which statement could be considered a scientific theory?
a. Beauty pageant contestants are becoming increasingly more beautiful. b. Chemistry and physics are more exact sciences than biology. c. Change occurs in the inherited traits of a population over generations. d. The growth of a plant is faster in a growth chamber than in a greenhouse. e. Leaves bend toward the light because they know light is needed to grow.
An example of a reversible process is the
A) Swinn cycle. B) Joule cycle. C) Otto cycle. D) Carnot cycle. E) Wenkle cycle.
How does Earth's varying distance from the Sun affect our seasons?
A) It doesn't; Earth's orbital distance plays no significant role in the seasons. B) It makes summer warmer in the Northern Hemisphere than in the Southern Hemisphere. C) It is responsible for the fact that the seasons are opposite in the Northern and Southern hemispheres. D) It causes the seasons to be more extreme than they would be if the Earth's distance from the Sun were always the same.
A wave travels an average distance of one meter in one second with a frequency of 1 hertz. Its amplitude is
A) less than 1 meter. B) 1 meter. C) more than 1 meter. D) need more information