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Question 19N.3.HL.TZ0.a

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Date November 2019 Marks available [Maximum mark: 2] Reference code 19N.3.HL.TZ0.a
Level HL Paper 3 Time zone TZ0
Command term Estimate Question number a Adapted from N/A
a.
[Maximum mark: 2]
19N.3.HL.TZ0.a

Proxima Centauri is a main sequence star with a mass of 0.12 solar masses.

Estimate lifetime on main sequence of Proxima Centaurilifetime on main sequence of Sun.

[2]

Markscheme

realization that lifetime T∝massluminosity ✔

TT⊙=MM⊙-2.5=0.12-2.5=200 ✔

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