Answer:
Explanation:
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To objective is to find the:
(i) required heat exchanger area.
(ii) flow rate to be maintained in the evaporator.
Given that:
water temperature = 300 K
At a reasonable depth, the water is cold and its temperature = 280 K
The power output W = 2 MW
Efficiency 
= 3%
where;
However, from the evaporator, the heat transfer Q can be determined by using the formula:
Q = UA(L MTD)
where;
Also;
LMTD = 4.97
Thus, the required heat exchanger area A is calculated by using the formula:
where;
U = overall heat coefficient given as 1200 W/m².K
The mass flow rate:
To solve this problem it is necessary to apply the concepts related to the rate of heat transfer in the materials.
By definition the rate of heat conduction transferred is understood as
Where,
Rate of heat transfer
k = Thermal conductivity
A = Surface area
d = Thickness
Temperature at different states.
Our values are given as,
Substituting for the wood carpet we have,
Substituting for the ceramic we have,
Therefore the rate of heat transfer for the wood carpet is 0.37W while the rate of heat transfer for the ceramic is 7.7W
The vertical force acts perpendicular to the horizontal motion and will not affect it since perpendicular components of motion are independent of each other. Thus, the projectile travels with a constant horizontal velocity and a downward vertical acceleration.
Option b is the correct one.
The negative sign before the force gives it a direction whether it's opposite to another force.
Hope this helps!
