The answer is #4, "They are always drawn in pen. That is false, because what if they have to erase a part of their desing, then what?
U mean how to connect them to your phone?
Answer:
The heater load =35 KJ/kg
Explanation:
Given that
At initial condition
Temperature= 15°C
RH=80%
At final condition
Temperature= 50°C
We know that in sensible heating process humidity ratio remain constant.
Now from chart
At temperature= 15°C and RH=80%

At temperature= 50°C


The heater load = 73 - 38 KJ/kg
The heater load =35 KJ/kg