Explanation:
what is asked give brief explanation about question
Answer:
electric energy ( power ) = 300000 W
Explanation:
given data
mechanical (hydroelectric) energy = 120 MJ/min = 2000000 J/s
efficiency = 15 % = 0.15
solution
we know that Efficiency of electric engine is expression as
Efficiency = Mechanical energy ÷ electric energy ......................1
and here dam electrical power output is
put here value in equation 1
electric energy ( power ) = Efficiency × Mechanical energy ( power )
electric energy ( power ) = 0.15 × 2000000 J/s
electric energy ( power ) = 300000 W
Answer:
Explanation:
Given
Velocity of jet relative to the carrier
Velocity of jet carrier to the wind
Velocity of wind
Length of runway=126 m
thus =20.11+8.94=29.05
=29.05+45=74.05 m/s
to find acceleration
here u=0,v=74.05 m/s
case -2
Velocity of jet relative to the carrier
Velocity of jet carrier to the wind
Velocity of wind
Length of runway=126 m
here u=0,v=77.7 m/s
Answer:
1) 65 m
2) 40 m/s downward
Explanation:
Using for both questions the kinematic equation
v² = u² + 2as
and ignoring air resistance.
1) h = 60 + √(20²/(2(9.8))) = 64.51753...
2) v = √(20² + 2(9.8)(60)) = 39.69886...
too much sun is dangerous for humans and can cause cancer so it's important that light is reflected for example a pool reflects water back to space that is why water sometimes is cold because it reflects light