An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?
Answer (2)
The total charge delivered by an electric device with a current of 15.0 A in 30 seconds is 450 C. This corresponds to approximately 2.81 x 10^21 electrons flowing through the device. The calculation involves using the relationship between current, charge, and the charge of an electron.
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Here's a conversation among high school students discussing what they can and cannot do in various school facilities and regarding their studies:
In the Canteen:
Alex: Hey, did you know we can use the canteen anytime during lunch hours?
Jamie: Yes, but we must remember to keep it clean. We mustn't leave any trash behind.
Pat: Right! We can also ask the canteen staff if we need any help.
In the Library:
Chris: The library is my favorite place since we can read so many books!
Taylor: Same here, though we mustn't make noise. We have to be quiet so others can study.
Jordan: We should also remember that we can borrow books, but we must return them on time.
In the Computer Room:
Morgan: I love how we can use the computers for research.
Riley: True, but we mustn't download any unauthorized software. It's important to keep everything secure.
Casey: And we must always log off when we're done. That's really important.
In the Laboratory:
Sam: In our chemistry lab, we must wear safety goggles at all times.
Drew: Definitely, and we mustn't eat or drink in there!
Alexis: Also, we can ask the teacher if we're unsure about an experiment. Safety first!
In their Studies:
Jordan: For our math class, we can use calculators on certain tests.
Jamie: But we mustn't use them unless the teacher allows it.
Taylor: We must study regularly. You can't understand everything just before exams.
