Supernovae, neutron stars, and black holes (AQA A-Level Physics): Quizzes

What is the approximate value of one solar mass?

$2 \times 10^{30}$ kg

During the main sequence stage, what two forces are in equilibrium?

Gravity inward & fusion pressure outward

Stars with mass less than what value become red giants?

3 solar masses

What is the maximum mass for a star to become a white dwarf?

< 1.4 solar masses

Approximately how much energy can a supernova release?

~$10^{44}$ J

What is the approximate density of a neutron star?

~$10^{17}$ kg/m³

Stars with mass greater than what value form black holes?

3 solar masses

What is the formula for the Schwarzschild radius $R_s$?

$R_s = \frac{2GM}{c^2}$

Why are Type Ia supernovae used as standard candles?

Consistent peak absolute magnitudes

Where are supermassive black holes typically located?

Centre of most galaxies