Answer:
mechanical energy per unit mass is 887.4 J/kg
power generated is 443.7 MW
Explanation:
given data 
average velocity = 3 m/s
rate = 500 m³/s
height h = 90 m
to find out 
total mechanical energy and power generation potential
solution
we know that mechanical energy is sum of potential energy and kinetic energy 
so 
E =  ×m×v² + m×g×h    .............1
×m×v² + m×g×h    .............1
and energy per mass unit is 
E/m =   ×v² + g×h
×v² + g×h
put here value
E/m =   ×3² + 9.81×90
×3² + 9.81×90
E/m = 887.4 J/kg
so mechanical energy per unit mass is 887.4 J/kg
and
power generated is express as 
power generated = energy per unit mass ×rate×density
power generated = 887.4× 500× 1000
power generated = 443700000 
so power generated is 443.7 MW
 
        
             
        
        
        
(198,000 joule / 15 minute) x (minute / 60 sec) = 220 joule/sec = <em>220 watts
</em>
        
             
        
        
        
Answer:
Option B. magnitude of displacement of a sound pressure wave 
Explanation:
Amplitude is simply the maximum displacement of a wave from its mean position. 
 
        
                    
             
        
        
        
Answer:
A. The path of least resistance.
Explanation:
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