The quantity heat loss through below-grade basement walls at a depth of 6-7 feet with no insulation is C. 0.069
<h3>What is insulation?</h3>
Insulation is the process of constructing a barrier between two objects that reduces heat transfer by either reflecting thermal radiation or decreasing thermal conduction and convection from one to the other. The insulation will be more or less effective depending on the material of the barrier.
We can directly see the value of heat loss below grade basement walls at different depth from the handbook of fundamentals.
Heat loss through below grade basement walls at depth of 6-7 ft with no insulation is
= 0.069 BTU/hr.ft.0F (In English units)
Hence option ( C ) is correct.
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Answer:
B. 152.64
Explanation:
The average value of a sinusoidal waveform taken over half cycle is given by
or simplifying it further results in;
We are given
Hence option B is the right answer
Please note:
The average value of a pure sinusoidal wave over a full cycle (0 to 360°) is always zero since the positive and negative half cancel out each other due to being symmetric.
This is why we always take average over half cycle (0 to 180°).
Answer:
ExplanationAir at 1 atm and 20°C flows tangentially on both sides of a thin, smooth flat plate of ... ... Smooth Flat Plate Of Width W = 10 Ft, And Of Length L 3 Ft In The Direction Of The Flow. The Velocity Outside The Boundary Layer Is Constant At 20 Ft/s.
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