We know that the time it takes for water to move from the 8th floor to the 1st floor is 2 seconds, so in that time it is enough to burn a person's face. We see that his temperature is only dropping. 100 degrees to 98 degrees. If you the amount of water is large enough, even if the temperature is minus 40 degrees, it will be around 95 degrees. . .
The water level of the Three Gorges Reservoir has increased from 148m to 158m, which can generate an additional 10 billion kWh in effect, because the higher the water level, the more the water has energy; the flow is straight
This problem is quite complicated!
Power = work/time.
The mechanical energy possessed by the water column comes from the work done by the engine.
Therefore,< /p>
work = All mechanical energy in the water column!
Because the velocity of all water becomes zero as it rises to the top, the potential energy gravitationalt maximum.
When it has just been pulverized, it has the maximum speed and kinetic energy. Gravitational potential energy is zero.
Therefore, place all the water towards the top.
The total. the mechanical energy is obtained:
w=mgh=20*g *5=100g
The time is S=0.5gt*t
t =1 second< /p>
Therefore, the power is
P=w/t=100g/1=1000W
When water flows from upstream , the gravitational potential energy of the water decreases, the kinetic energy increases, and the gravitational potential energy is converted into kinetic energy; the impact on the turbine wheel is the transfer of kinetic energy from the water to the wheel.
The turbine of the water turbine drives the generator to produce electricity, converting the mechanical energy of the turbine into electrical energy.
Thus, in the whole process, energy is converted from the mechanical energy of water (or gravitational potential energynnel, kinetic energy) into electrical energy.
So the answer is: gravitational potential;