I. Introduction to the Volume
Volume, also known as capacity and volume, is the size of the space occupied by an object. The international unit of volume system is cubic meters. The volume of a solid object is a numerical value that describes the space occupied by the object in three-dimensional space. One-dimensional space objects (such as straight lines) and two-dimensional space objects (such as squares) have zero volumes in three-dimensional space.
Second, historical development.
Zu Chongzhi, a mathematician in the Southern Dynasties, was the first person in the world to get the correct formula for calculating the volume of a sphere, about a thousand years earlier than Europeans. He also carefully studied the art of celestial arithmetic (astronomical mathematics) and refined the calendar of the Ming Dynasty. After his repeated requests, it was officially promulgated on 5 10. He also made bronze sundials (an instrument for measuring the time from the shadow of the sun), clepsydra and other precision observation instruments, which were adopted by later generations.
Third, the difference between quantity and quantity.
(1) The measurement methods are different: the volume is measured from the outside of the object and from the inside of the object. The shape and position of the same object change, but the volume remains unchanged; When different objects are put together, their volumes remain the same; Two containers with the same volume may have different volumes.
(2) Different meanings: volume refers to the size of the space occupied by objects, while volume refers to the volume of objects that can be accommodated in wooden cases and oil drums. An object has a volume, but it doesn't necessarily have a volume.
(3) Different units: the commonly used unit of volume is cubic meter, cubic decimeter, cubic centimeter and cubic millimeter; Commonly used unit of volume includes liters and milliliters.