Answer:
4.modifying a building to achieve an entirely new purpose
Complete Question
The complete question is shown on the first uploaded image
Answer:
a) 
b) 
Explanation:
The explanation is shown on the second and third uploaded image
Answer:
C. Have your hazard lights on
Explanation:
Speeding up will cause an accident
Counter steering is not easy to do
Slowing down my result in you being rear ended
Answer:
e= 50 J/kg
Explanation:
Given that
Speed ,v= 10 m/s
Diameter of the turbine = 90 m
Density of the air ,ρ = 1.25 kg/m³
We know that mechanical energy given as

That is why mechanical energy per unit mass will be

Now by putting the values in the above equation we get

e= 50 J/kg
That why the mechanical energy unit mass will be 50 J/kg.