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.
(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.
1 answer:
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Answer:
-62.45m/s and +62.45m/s
Explanation:
The formula for relativistic speed
This is the speed of A with respect to B
where
will be the velocity of person 1: 39m/s
will be the velocity of person 2: -31m/s (negative because is travelling in opposite direction)
and the velocity of light: 100m/s
The velocity of person 1 measured by person 2 is:
The velocity of person 2 measured by person 1 is: