Question

Which of the following is the correct relationship between R and Cp?

(a) R=Cp\(\frac{\gamma-1}{\gamma}\)

(b) Cp=R\(\frac{\gamma-1}{\gamma}\)

(c) R=Cp\(\frac{\gamma+1}{\gamma}\)

(d) Cp=R\(\frac{\gamma}{\gamma-1}\)

I got this question in class test.

Query is from Measurement of Airflow Characteristics in division Atmosphere and Air Data Measurement of Aircraft Performance

Answer 1

Correct option is (a) R=Cp\(\frac{\gamma-1}{\gamma}\)

For explanation I would say: R=Cp\(\frac{\gamma-1}{\gamma}\) is the correct relationship between R and Cp where R= characteristic gas constant, γ is the ratio of specific heat at constant pressure to that of specific heat at constant volume and Cp is the specific heat at constant pressure.