Answer:
t=5.2seconds
Explanation:
First, we state our assumptions:
Given
and gas stream
We use the time constant to find the diameter of the junction:
Now, check the validity of the lumped system analysis. With
#Lumped Analysis is OK
Bi<<0.1, therefore the lumped approximation is excellent. The time required for the junction to reach :
It takes 5.2seconds for the junction to reach 199 oC
B. a solar storm that moves across the sun's surface
In the first law of thermodynamics, the Q stands for heat.
delta E is the change in internal energy of a closed system is equal to the amount of heat (Q) in the system minus the amount of work done (W).
Answer:
pretty sure it's true....