1According to cosmological models, a universe that eventually stops its expansion and contracts back into a point of infinite density (a 'Big Crunch') is described as being:
2Based on the Hertzsprung-Russell diagram, which of the following statements correctly compares white dwarf stars to our Sun?
3Which of the following statements regarding Newton's law of gravitation and its application to the Earth-Moon system are correct?
4If the Sun radiates peak energy at a wavelength of 5.2 x 10^-7 m, use Wien's Law (constant = 2.90 x 10^-3 m K) to calculate its approximate surface temperature in Kelvin.
5Two identical stars, A and B, are observed from Earth. The flux from star A is 16 times greater than the flux from star B. What is the ratio of the distance of star B to star A (d_B / d_A)?
6What conditions are necessary for nuclear fusion to occur in the core of a star like the Sun?
7Hubble's Law relates the recession velocity of a galaxy to its distance. What does the gradient of a graph of Velocity (y-axis) vs Distance (x-axis) represent?
8Which of these are valid reasons why a Hertzsprung-Russell diagram typically uses logarithmic scales for its axes?
9A line in the hydrogen spectrum from a lab source has a wavelength of 656 nm. If a distant galaxy shows this line at 684 nm, what is the speed of recession of that galaxy?
10In the context of stellar evolution, what is the fate of a star whose core remnant after a supernova explosion is 1.2 solar masses?
