Chapter 17, Problem 88P

To determine

To Find:

a) Ratio of $∆p_r/∆p_m$, when $\varphi =0$

b) Ratio of $∆p_r/∆p_m$, when $\varphi =\pi /2$

c) Ratio of $∆p_r/∆p_m$, when $\varphi =\pi /3$

d) Ratio of $∆p_r/∆p_m$, when $\varphi =\pi /4$