An astronomer studies a compact object left by a massive star. The object formed from a core of moderate mass.
| Quantity | Value |
|---|---|
| mass | 3.0 × 1030 kg |
| diameter | 20 km |
| volume | 4.2 × 1012 m3 |
Use the equation
density=massvolume\text{density} = \dfrac{\text{mass}}{\text{volume}}density=volumemass
Calculate the density of the compact object.
State which type of stellar remnant has these properties.
State the astronomical event during which this remnant formed.
A different massive star leaves a core with enough mass for its collapse to continue without limit.
Name the object that forms.
A star of similar mass to the Sun loses its outer layers. Its exposed core is hot, dense and about the size of the Earth.
State the type of remnant.
75 exam-style questions on Edexcel GCSE Physics 7.3 Stars, covering 7.3.1 Evolution of stars similar to the Sun, 7.3.2 Evolution of massive stars, and 7.3.3 Observing the Universe. Each one has a worked solution and a mark scheme showing where the marks go.