A device for revolving a liquid has a hollow shaft for supplying gas to the liquid, and the free end of the shaft is immersed in the liquid where it carries a propeller for revolving the liquid. The propeller comprises at least one screw-shaped vane, and at least part of the vane's ...
acondensation: the change of gas or vapor to a liquid;either by cooling or being subjected to increased pressure.When water vapor cools in the atmosphere,for example,it condenses into tiny drops of water,which forms clouds. 结露: 气体或蒸气的变动对液体; 通过冷却或被服从到增加的压力。例如时...
Water can exist in three states: solid, liquid and gas. What is an example of water in a solid state? A. Water vapor. B. Ice. C. Rain. D. River water. 相关知识点: 试题来源: 解析 B。冰是水的固态形式;A 选项水蒸气是气态;C 选项雨是液态;D 选项河水是液态。
A gas has two specific heats whereas a liquid and a solid have only one. Why? While a solid changes into liquid, the temperature of the (a) solid and liquid are the same. (b) Solid is greater. (c) liquid is greater. (d) none of these. ...
electronics when not in use, using natural light instead of electric lights where possible, using a touch-free faucet to reduce water heater use, using a smart thermostat to monitor and adjust temperatures automatically, installing a solar hot water heater, and turning off electronics when not in...
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Produce volatile compounds,chemicals that easily change from a liquid to a gas.A flower's sweet smell,for example,comes from volatile compounds that the plant produces to attract insects such as Bugs and bees. Plants can also detect volatile compounds produced by other plants.A tree under attack...
Pascal’s principle, in fluid (gas or liquid) mechanics, statement that, in a fluid at rest in a closed container, a pressure change in one part is transmitted without loss to every portion of the fluid and to the walls of the container. The principle wa
The Grain Future Act of 1922 was a turning point.6The law established reporting requirements and attempted to limit the massive price fluctuations of the era by mandating that all grain futures be traded on regulated futures exchanges. Still, in the turbulent years moving into the 1930s, the ...
An exchange of futures for physical (EFP) is a private agreement between two parties to trade a futures position for the underlying actuals.