a heat pump isn’t generating heat, as a furnace does. It’s just moving heat. You can think of a heat pump as a kind of lever or pulley system. For example, you can lift a 500 pound weight with only 50 pounds of force when you use ablock-and...
This example problem demonstrates how to convertthe pressure unitsmillibar (mbar) toatmospheres(atm). Atmosphere originally was a unit related to the air pressure at sea level. It was later defined as 1.01325 x 105pascals. Abar is a pressureunit defined as 100 kilopascals and 1 millibar is 1...
was used in making the determinations here reported. This method depends upon difference in penetrating characteristics of mercury and water, the volume of mercury and pressure required to force it into pores, making it possible to evaluate the porosity of the material in terms of volume of pores...
The value of the pound will force British companies to be leaner and fitter. 英镑目前的汇率将迫使英国公司厉行精兵简政。 《柯林斯高阶英汉双解学习词典》 14、 Some analysts predicted that the exchange rate would soon be $2 to the pound. 一些分析人士预测,英镑对美元的汇率将很快达到1:2。 《柯...