Solution :
Characteristic length = thickness / 2
= 0.02 m
Thermal conductivity for steel is 42.5 W/m.K
= 0.014
Since the Biot number is less than 0.01, the lumped system analysis is applicable.
Where,
T = temperature after t time
= surrounding temperature
= initial temperature
t = time
We calculate B:
= 0.000416
Thus,
t = 5281.78 second
= 88.02 minutes
Thus the time taken for reaching 100 degree Celsius is 88.02 minutes.
Answer:
Z = 3 + 0.23t
The water level is rising
Explanation:
Please see attachment for the equation
Answer:
Force transmitted by the coupling between the nozzle and hose = -1.81 kN.
Explanation:
See attached pictures.