You first have to say: Okay this is a Coulomb, and the check how many electrons you have. Same as if you say: Okay so this is a gram, and then you can say: this table feels the same as 1000 times this gram thing, so 1000 grams per table.
This was THE most confusing aspect of fundamental electrical engineering for me. For the life of me I couldn't get it through my head that there didn't need to be a unit of time or cross sectional area in order for the coulomb to be represented as said many electrons. A coolant simply is 625 quintillion electron and we get that number by inversing the electrical charge of a single electron! For now I will keep it in my head and figure out the cross-sectional area part later cuz it doesn't seem to be important at all for most things
I guess the confusion comes from the fact that in 1 dimension we use -ve sign to denote 'opposite direction'. Over here the negative sign is not denoting the opposite direction, instead, it's denoting a value less than zero. Just negative energy (which is a scalar).
The real reason why there is soo much division and disunity in the world is. . . 🤔 Probably because it is soo hard to come to a consensus. 😭 A coulomb (C) is the standard unit of electric charge in the International System of Units (SI). It is the amount of electricity that a 1-ampere (A) current carries in one second (s). A quantity of 1 C is equal to the electrical charge of approximately 6.24 x 10^18 electrons or protons. Surely, a measly 0.01x 10^18 Dollars more or less in one's personal Bank Account is a smidgen only a Fishwife would actually worry about. Why should a Physicist or a Mathematician even raise a brow?🤗
This video is unsatisfactory. It doesn’t explain WHERE THE NUMBER CAME FROM IN THE FIRST PLACE! For example, of course we can say a meter is 39.37 inches, or that it’s equal to a huge number of wavelengths of a particular item. But the real reason is we need a unit of measure of length to be used by humans on Earth. Humans use base ten numbers (because we each have ten digits on our hands) and so our unit of length was chosen because it is one ten-millionth of the distance from Earth’s equator to the North Pole. See? It’s based on our planet and the size is handy for humans and it makes use of our using a base ten number system. Our unit of mass? Similar reasoning. On Earth the fundamental thing that makes our planet unique and able to support life is water. So our unit of mass is based on a cube of water with each side 1/100th of a meter in length. Our unit of temperature: the range from when water freezes to when water boils. Divide that by 100. 1/100th of the way from freezing to boiling equals one degree. It all makes perfect sense. It’s tied to our planet. But the number for one Coulomb? 6.241509 X 10^18 electrons equals one coulomb of charge?! WHY? What is that based upon? There’s has to be a reason why that was chosen to be the SI unit of charge. And that’s really what this video should have been about.
when the potency is 19 on up it means where the dot is. To get 18 up there you have to move the dot by one. In this case, the potency is positive which means to make it smaller you have to move the dot to the right by one.
