我喜欢设计一些在太空中或在其他星球上的有关物理习题,这不仅有利于学生的物理学习,还可以开阔知识面,接受一些天文学知识.下面例举的有关普通水银气压计的习题就是如此类型的.我们可以利用大家熟悉的公式p=ρgh (1)来求得产生一定高度的水银柱的大气压强.其中p是压强,ρ是液体的密度,g是当地的万有引力加速度,h是液柱的高度.为得到在其他星球上的压强,首先应解决(1)式中液柱的高度.h=p/ρg (2)根据地球表面(海平面)的一般大气压强值 I like to design some physics exercises in space or on other planets. This not only helps students learn physics, but also broadens their knowledge and accepts some astronomical knowledge. The following examples of exercises related to common mercury barometers are like this: Type. We can use the familiar formula p=ρgh (1) to find the atmospheric pressure of a mercury column that produces a certain height, where p is the pressure, ρ is the density of the liquid, g is the local gravitational acceleration, and h is the liquid The height of the column. To obtain the pressure on other planets, the height of the liquid column in (1) should be solved first. h = p/ρg (2) The general atmospheric pressure value according to the earth’s surface (sea level)