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Happy National Day to all sea friends! Welcome to the leisure area to share and chat more. Once, all the scientists in Heaven decided to play a game of hide-and-seek. Unfortunately, it was Einstein’s turn to look for someone; he planned to count to 100 before starting his search. Everyone started to hide, except Newton. Newton simply drew a square with sides of 1 meter on the ground in front of Einstein, then stood in the middle of it. Einstein counted to 97, 98, 99, 100, then opened his eyes and saw Newton standing in front of him; he called out, “Newton’s out, Newton’s out.” ” Newton said, “I’m not out because I’m not Newton.” I am standing in the center of a square with a side length of 1 meter; this means I am newtons per square meter, so I am pascals. ” Einstein was frustrated; he kept searching and found a box. When he opened it, Joule was hidden inside. Einstein exclaimed, “Joule, you’re out! Joule, you’re out.” ” Joule said, “I’m not out because I’m not Joule.” I am hidden inside a box with a volume of 1 cubic meter; that means I am in joules per cubic meter, so I am also pascals. ”
This is good; it can be used as a teaching material for learning*.
There are a total of 7 basic units: meter, kilogram, second, ampere, kelvin, mole, and candela; it’s just that I don’t understand the candela
What is a candela, and is it widely used in the chemical industry?
A unit of optical energy; it has nothing to do with chemistry at all