This is due to Earth's gravity. All objects on the earth's surface, including the atmosphere, are affected by the earth's gravity and the direction of movement is towards the center of the earth. The water therefore flows upwards.
As for water that overcomes gravity and rushes to the top of the mountain, humans have not yet reached that level.
Now there is a small pressure gauge with water in it. If you carry it from the bottom of the mountain to the top, will the fluid level go up or down?
During peak electricity consumption hours of the day, water from the reservoir at the top of the mountain is lowered to drive the turbine to produce electricity, i.e. that the mechanical energy of the water is converted. in electrical energy and internal energy of the turbine;
At night, the electric water pump pumps water down the mountain. Water from the tank is pumped back to the tankat the top of the mountain, which consumes electrical energy and converts water. electrical energy into mechanical energy of water and internal energy of the electric water pump;
Analysis of each option shows that C is correct;
So choose C.
The liquid level of the liquid column in contact with the external atmosphere will increase. Since the liquid level is flat at the bottom of the mountain, this means that the air pressure in the sealed section is the same as the atmospheric pressure outside. When you reach the top of the mountain, the outside air pressure decreases as altitude increases. , but the pressure inside is still the pressure at the foot of the mountain, which is greater than the pressure outside. Therefore, the liquid will be pushed outwards, causing an increase in the level of liquid in contact with the external atmosphere.