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anonymous
 one year ago
help! :)
anonymous
 one year ago
help! :)

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can you explain what opposites are and give examples of real world situations? :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@Michele_Laino just explain it in your own words :)

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0for example 5 and +5 are opposite with respect to addition, since we have: 5+(+5)=0, and 0 is the neutral element of addition of the set of integers

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok thats the example?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0yes it is an example which comes from mathematics

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok and can you explain what opposites are

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0here is another example from physics: north pole and south pole are opposite, since between them there is an attractive force

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0I meant norh pole and south pole of a magnet

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok i get the examples, but can you explain what opposites are not in an example please :)

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0referring to the quantum electrodynamics processes, I can say that opposites element are such that when they are both presents, they disappear and a new form of energy will appears

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0such process is called annihilation

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok next question! :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can you describe multiplying and dividing signed numbers in the real world?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0yes, I know an example from physics, nevertheless it is difficult to understand.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0but describe it in your own words please

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0it is related to a solid state physics of semiconductors. When we study semiconductors, we have to introduce the so called effective mass of a carrier of electricity, and such effective mass is negative. Of course such effective mass can be multiplied for a positive quantity in order to get another quantity

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.0another simpler example comes from the Coulomb law, which is related to the interaction between a positive charge and a negative charge, for example. So in order to get the magnitude of the interaction force between a positive and a negative electric charges, I have to multiply a negative quantity with a positive quantity, using the subsequent algebrauc expression: \[\Large F = K\frac{{{Q_1}{Q_2}}}{{{r^2}}}\] where Q1>0, Q2<0, r>0 and K>0

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0this is all so confusing!
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