Evolution of massive stars (AQA A-Level Physics): Quizzes

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Evolution of massive stars
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What is the mass threshold for stars that primarily fuse hydrogen through the CNO cycle?

Greater than 1.4 solar masses

How does the luminosity of a red supergiant compare to that of the Sun?

Approximately 100,000 times greater

Approximately how much energy is released during a Type II supernova explosion?

104610^{46} joules

What distinguishes a Type I supernova from a Type II supernova?

Type I occurs in binary systems

How long does the core collapse take in a Type II supernova?

A matter of seconds

What is the typical diameter of a neutron star?

About 20 kilometres

What is the approximate density of a neutron star?

2×10172 \times 10^{17} kg·m⁻³

What is the maximum rotation rate observed for pulsars?

Up to 600 times per second

What is the formula for the Schwarzschild radius of a black hole?

RS=2GMc2R_S = \frac{2GM}{c^2}

What is the mass of the supermassive black hole at the centre of the Milky Way galaxy?

Approximately 4.1 million solar masses

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