Answer to Question #94583 in Physics for Jedi Linasan

Question

Convert normal blood pressure readings of 120 over 80 mm Hg to newtons per meter squared using the relationship for pressure due to the weight of a fluid (P=phg) rarher than a conversion factor

Answer 1

The deinsity of mercury is

$$\rho=13600\frac{kg}{m^3}$$

$$P_1=\rho g h_1=(13600)(9.8)(0.12)=16000\frac{N}{m^2}$$

$$P_2=\rho g h_2=(13600)(9.8)(0.08)=10700\frac{N}{m^2}$$

The normal blood pressure lies between these two values.