Physics (AS & A Level) · Oct / Nov 2016 · Paper 12 · Question 2

The speed v of sound in a gas is given by the equation v = √(γP/ρ) where P is the pressure of the gas, ρ is its density and γ is a constant. What are the SI base units of γ?

1. Am⁻¹ s
2. Bm³ s⁻³
3. Cm⁻⁴ s⁻⁴
4. Dno units

As printed in the paper