Cooling water is fed by gravity from an open storage tank where the water level is 20 ft above the ground through 100 ft of 1 ½ inch ID steel pipe (light rust), to a heat exchanger at ground level. If the pressure entering the heat exchanger must be 5 psig for it to operate properly:

(a) Ignoring the kinetic energy change, what is the water flow rate through the pipe?
(b) After ignoring the kinetic energy, validate whether this was a good assumption.

Explanation:

Solution is attached below

gpe = mass x gravity constant x height or… gpe = mgh

where… mass: measured in kilograms (kg)

gravity: gravity constant on earth = 10.00 m/s2

height: measured in meters (m)

gpe: measured in joules (j) or kilojoules (kj)

how do you solve gpe?

gravitational potential energy (gpe) is the energy an object has because of its position above the. ground.

gpe = mass x gravity constant x height or… gpe = mgh.

mass:

note: to earn full marks when solving science word problems, you must show your work:

formula.

example:

given values:

mass = 0.3 kg.