An astronomer uses a computer model containing two fictional stars, Aven and Bront.
The model assumes that main sequence duration is directly proportional to the hydrogen available and inversely proportional to the rate at which the hydrogen is used.
| fictional star | hydrogen available, relative to Aven | rate of hydrogen use, relative to Aven | main sequence duration |
|---|---|---|---|
| Aven | 1.0 | 1.0 | 6.0 billion years |
| Bront | 18 | 12 00012\,00012000 | unknown |
Calculate the main sequence duration predicted for Bront. Give your answer in years.
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.