“米”是世界上使用最广泛的长度单位。1 米等于100公分,等于1公里的千分之一,合 3市尺或者6英尺8英寸。你知道长度单位 “米”是怎么确定的吗？ 1673年,惠更斯发现了单摆振动周期公式 后,建议采用将秒摆(周期为2秒)的摆长定 义为1米。但在地球的不同地点,重力加速 度不同,秒摆的摆长也不同。所以此建议未 “M” is the most widely used length unit in the world. One meter is equal to 100 centimeters, which is equal to one thousandth of a kilometer, which is 3 yards or 6 feet 8 inches. Do you know how the length unit “m” is determined? In 1673, after Huygens discovered the single pendulum oscillation period formula, it was suggested to use a pendulum length of 1 meter for a second pendulum (with a period of 2 seconds). However, in different locations on the Earth, the acceleration of gravity is different, and the pendulum length of the second pendulum is also different. So this proposal is not