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statuscvo [17]
3 years ago
12

Um grupo de amigos reunidos em um clube cria, de brincadeira, uma corrida chamada "Maratônica". Nela, os competidores são obriga

dos, pelo regulamento, a tomar 100 mililitros de água tônica a cada 300 m corridos, em um percurso de 2,5 km.
O percurso total da maratona no SI é igual a:



a) 300 km



b) 2500 m



c) 2,5 m



d) 2500 km



e) 300 m
Physics
1 answer:
stepladder [879]3 years ago
3 0
Respuesta b) 2500
.......………
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Suppose the battery in a clock wears out after moving thousand coulombs of charge through the clock at a rate of 0.5 Ma how long
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Answer:

Hello your question is poorly written below is the complete question

Suppose the battery in a clock wears out after moving Ten thousand coulombs of charge through the clock at a rate of 0.5 Ma how long did the clock run on does battery and how many electrons per second slowed?

answer :

a) 231.48 days

b) n = 3.125 * 10^15

Explanation:

Battery moved 10,000 coulombs

current rate = 0.5 mA

<u>A) Determine how long the clock run on the battery. use the relation below</u>

q = i * t ----- ( 1 )

q = charge , i = current , t = time

10000 = 0.5 * 10^-3 * t

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q = n*e ------ ( 2 )

n = number of electrons

e = 1.6 * 10^-19

q = 0.5 * 10^-3 coulomb ( charge flowing per electron )

back to equation 2

n ( number of electrons ) = q / e = ( 0.5 * 10^-3 ) / ( 1.6 * 10^-19 )

hence : n = 3.125 * 10^15

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