Two AAA-size lithium batteries are connected in series in a flashlight. Each battery has 3.5 volt and 4- Amp-hour capacity. If t
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Answer:
R= 1.25
Explanation:
As given the local heat transfer,
But we know as well that,
Replacing the values
Reynolds number is define as,
Where V is the velocity of the fluid and \upsilon is the Kinematic viscosity
Then replacing we have
<em>*Note that A is just a 'summary' of all of that constat there.</em>
<em>That is </em>
Therefore at x=L the local convection heat transfer coefficient is
Definen that we need to find the average convection heat transfer coefficient in the entire plate lenght, so
The ratio of the average heat transfer coefficient over the entire plate to the local convection heat transfer coefficient is