Answer:

Explanation:
we know by energy balanced for steady flow system that control volume W is given as

here
is mass flow rate
we have W = 11 kW
Outer temperature = 70°C
Inner temperature = 15°C
therefore we have mass flow rate



Number 1 the correct answer
Answer:
While Bohr's atomic model hypothesizes that electrons move in particular energy levels around the nucleus, the electron cloud model suggests that electrons move in an unpredictable pattern but are more likely to be in certain regions than others.
Explanation: