Physics (AS & A Level) · Feb / March 2019 · Paper 12 · Question 2

At temperatures close to 0 K, the specific heat capacity c of a particular solid is given by c = bT^3, where T is the temperature and b is a constant, characteristic of the solid. The SI unit of specific heat capacity is J kg^-1 K^-1. What is the unit of constant b, expressed in SI base units?

1. Am^2 s^-2 K^-3
2. Bm^2 s^-2 K^-4
3. Ckg m^2 s^-2 K^-3
4. Dkg m^2 s^-2 K^-4

As printed in the paper