在火灾现场,消防队员用水枪喷出的水射流进行灭火(图1)。这时,他们总是想怎样使水射流能射得远、射得高,能射到火焰处,扑灭火焰。怎样才能使水射流射得远、射得高呢?如果你玩过水枪的话,就可能有所体会。你也可以做下面的实验进行探究,找出制约水射流射程与高度的因素。实验器 At the scene of the fire, firefighters used water jets fired from water guns to extinguish the fire (Figure 1). At this time, they always want to make the water jets shoot far, shoot high, shoot at the flames, and extinguish the flames. How can we make the water jets shoot far and shoot high? If you have played water guns, you may experience it. You can also do the following experiment to explore and find out the factors that limit the range and height of the water jet. Experimenter