Answer:
Q= 930.92W/m
Explanation:
Note that thermal conductivity of some common materials is from engineering tool box.
And the proper shape factor needed for the solution is found from the List of shape factor
Pressure of steam(T1)=400k
Diameter of the pipe(D)=0.6m
Square cross section of the concrete casing (W) =1.75m
Outer surface of casting maintained at a pressure (T2)=300k
Thermal conductivity (K) =1.7W/mK
The proper shape factor needed for the solution is found from the List of shape factor
Rate of heat loss (Q) =?
The heat rate (q) :
q=SKΔT1-T2=SK(T1-T2)
S=2πL/In(1.08W/D)
Heat loss per unit length is in terms of W/M
Note that, Q=q/L
By substitution, the full equation will be
Q=2πK(T1-T2)/In(1.08W/D)
Substituting values :
Q=2π(1.7W/mK)*(400K - 300k) / In[ (1.08(1.75m)/ 0.6m ]
Q= 930.92W/m
Answer: I see three children cleaning the lawn while one of them are raking the leaves and one is holding a dust pan. The other child is holding a bucket. On the other picture, i see a young boy watering plants.
BTW: these pictures are not very clear so answers may vary.
Explanation:
Answer:Yes,266.66 MPa
Explanation:
Given
Yield stress of material =140 MPa
Cross-section of 
Force(F)=8 MN
Therefore stress due to this Force(
)
Since induced stress is greater than Yield stress therefore Plastic deformation occurs
Answer: For #1 I'm going to go with A because that has to do with biology
For #2 I'm going to go with B oceans because that has to do with plant life (and life in general).
For #3 I'll say marine/maritime engineer (you can just say marine)
Hope it helps!
Answer:
c
Explanation:
This is because many things, such as pcs, over heat
