The pressure in a water line is 1500 kpa. what is the line pressure in (a) lb/ft2 units and (b) lbf/in2 (psi) units?

a) 1500 kpa = 31,328.3208 lb/ft2

b) 1500 kpa = 217.5 psi

Explanation:

This question can be solved using proportionality, that is, simple rules of three.

We have that:

Pressure of water line: 1500 kpa

(a) lb/ft2 units?

Each lb/ft2 is 0.04788 kpa. So

1 lb/ft2 - 0.04788 kpa

x lb/ft2 - 1500 kpa

So

1500 kpa = 31,328.3208 lb/ft2

(b) lbf/in2 (psi) units?

Each kpa is 0.145psi. So

1 kpa - 0.145 psi

1500 kpa - x psi

So

1500 kpa = 217.5 psi

answer; /// the above statement is (true);

snell's law

refractve index = sin incidence / sin refraction