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It doesn't know how toasted the bread is, if that's what you meant. But it has a timer, and when the time runs out, the bread pops up.

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14y ago

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How does a toaster know when the toast should pop up?

there's a timer in the toaster. it's related to how powerful the toaster is. ex. stronger toaster= bread toasted faster


Who invented the pop up toaster and when?

1919 Charles Strite invents a automatic pop-up bread toaster


When you use a toaster why does toast pop up and the bread disappears?

Magic. The toaster eats it. Bad toaster.


What is better pop tarts or toaster streudels?

pop tarts


Why are pop tarts called pop tarts?

cos they POP out of the toaster and they are TARTS


Why do Poptarts pop?

What do you mean by pop? I think that it's the toaster that pops not the tart. The pastry just rides up in the slot of the toaster.


Which is better toaster strudels or pop tarts?

Pop Tarts! :D


When did Charles p strite invent the toaster?

Charles Strite was with his wife one day shopping and the saw a toaster. It wasn't a toaster like you and I are used to, it was a toaster where you had to flip the bread by hand. His wife said " Wouldn't it be easier to have the bread turned automatically?" This lead Charles to make the Automatic toaster. Charles made an improvement to the automatic toaster by creating the first ever electric pop-up toaster.


What is the source of energy in pop up toaster?

The energy in a pop-up toaster comes from electricity. When the toaster is plugged in, the electrical current heats up wires inside the toaster, which in turn heats the bread or other items placed inside.


When was the pop-up toaster invented?

The pop up toaster was invented in 1919 in Minnesota by Charles P. Strite.19181919 by Charles strite1929-1930


Are Pop-Tarts not only for breakfast?

They are snacks so you can eat them whenever you want!


What did the pop-up toaster do to society?

made toast?