Explanation:
I think it would be C but i dont know because i dont have the following question
Answer:
Hello your question is incomplete below is the complete question
Electronic components are often mounted with good heat conduction paths to a finned aluminum base plate, which is exposed to a stream of cooling air from a fan. The sum of the mass times specific heat products for a base plate and components is 5000 J/K, and the effective heat transfer coefficient times surface area product is 10 W/K. The initial temperature of the plate and the cooling air temperature are 295 K when 300 W of power are switched on. 1) Find the plate temperature after 10 minutes.
answer ; 311.36 k
Explanation:
Given data :
sum of mass * specific heat products for a base plate and components ( Mcp )
= 5000 J/K
effective heat transfer coefficient * surface area ( hA ) = 10 W/K
Initial temperature of plate and cooling air temperature( Tc ) = 295 k
power ( Q = W ) = 300 W
a) Determine plate temperature after 10 minutes
10 mins = 600 secs ( t )
heat supplied = change in temp + heat loss
Q * t = mCp ( ΔT ) + hA ( ΔT ) t
300*600 = 5000 * ( T -295 ) + 10 ( T -295 ) * 600
therefore ; T - 295 = 16.363
T = 311.36 K
Answer:
Pitch circle diameter = 5,66 inch
Explanation:
<u>According to the pitch circle diameter formula</u>
<em>Dc= Dp - 2b</em> ; where Dp= primitive diameter, b= dedendum of the tooth and also the dedendum formula is b= 1,25 Pc/π.
The definition of primitive diameter is equal to (Pc*Z)/π ; Pc= circular pitch and Z= number of teeths.
<u>Replacing in the formula </u>
⇒ Dc= (Pc*Z)/π - 2* 1,25 Pc/π, Pc= 0,375 ; Z=50
In conclusion the pitch circle diameter is equal to:
Dc= 5,66 inch.
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Answer:
a) The proportional limit is 2.99MPa.
b) The modulus of elasticity is 0.427GPa.
C) The poisson´s ratio is 0.021
Explanation:
a) The proportional limit is the maximum stress for wich a tension bar stops acting as a linear material in a stress-strain curve. So this stress can be obtained as:
b) The modulus of elasticity E is the proportion between the strain and the stress in the linear section of the stress-strain curve.
The strain in for the proportional limit is:
Therefore:
c) The Poisson´s ratio is the negative proportion between the transverse strain and axial strain.
In this case, the transverse strain is:
So the poisson´s ratio is:
The reactor, generator, and the cooling towers