Hydropower systems build pressure either by containing the water behind a dam, or within a pipe that runs down a hill. The weight of the water behind the dam or in the pipe creates pressure at the bottom. More height creates more pressure, and more pressu
举一反三
- Water evaporates or steam condenses at the saturation temperature, which depends upon the pressure, the higher the pressure _____ the saturation temperature. A: the more B: the highe C: the lowe D: the highest
- Due to the present crisis and competition pressure, there will be more mergers within the airline industry.
- （） at the end of the distribution pipe ensures that adequate pressure is maintained by the pump.
- The pressure of water in the pipe___to the electric potential.
- 【单选题】Which of the following is true during inspiration? A. Intrapleural pressure is more negative than it is during expiration B. Alveolar pressure is higher than atmospheric pressure C. Intrapleural