Physics (AS & A Level) · Oct / Nov 2024 · Paper 13 · Question 3
9702SI units
The power output P of a star can be modelled with the equation P = σAT^4 where σ is a constant, A is the surface area of the star and T is the surface temperature of the star. What are the SI base units of σ?
- Akg s^-2 K^-4
- Bkg s^-3 K^-4
- Ckg m^-1 s^-2 K^-4
- Dkg m^-1 s^-3 K^-4
As printed in the paper
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Correct answer: B. kg s^-3 K^-4
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