摇动清洗玻璃罐的最佳水量是多少？

Does the ability to grow a beard give men an evolutionary advantage? Shake it up An easy way to clean a glass jar is to pour some water in it, screw on the lid and shake it. Is there an optimal amount of water to put in for the most effective cleaning? Richard Lawson Bolton, Greater Manchester, UK The cleaning effect depends on the energy transferred from the water to the jar when they collide. Kinetic energy is proportional to mass and the square of the velocity. So, if there is no water in the jar, the mass is zero and there is no kinetic energy. …