Answer:
a)
b) 
c) 
Explanation:
From the question we are told that:
Interior temperature 
outside temperature is 
Rate 
a)
Generally electric resistance heating is the heat transfer from interior building
Therefore


b)
COP =3
Generally the equation for coefficient of performance is mathematically given by

Therefore



c)
Generally the equation for coefficient of performance is mathematically given by



Therefore



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Answer:
a) the two-way concrete joist framing system
Explanation:
A waffle slab is also known as ribbed slab, it is a slab which as waffle like appearance with holes beneath. It is adopted in construction projects that has long length, length more than 12m. The waffle slab is rigid, therefore it is used in building that needs minimal vibration.
Answer:
V = 0.5 m/s
Explanation:
given data:
width of channel = 4 m
depth of channel = 2 m
mass flow rate = 4000 kg/s = 4 m3/s
we know that mass flow rate is given as

Putting all the value to get the velocity of the flow


V = 0.5 m/s