batspy
  • batspy
Sian wants to measure the number of seconds that it takes for the contents of a beaker to change from clear to purple. Which of these tools should she use for this purpose? an electronic balance a stopwatch a barometer a graduated cylinder
Chemistry
chestercat
  • chestercat
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Rushwr
  • Rushwr
what do u think ?
batspy
  • batspy
i think barometer
Rushwr
  • Rushwr
No Barometer is used to measure the atmospheric pressure. Out of all the instruments here only the stopwatch can measure time.

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Rushwr
  • Rushwr
Electrical balance is used to measure masses. ( small ones ) the graduated cylinder to measure volumes
batspy
  • batspy
a graduated cylinder my other answer wood be a graduated cylinder
Rushwr
  • Rushwr
"Sian wants to measure the number of seconds" That means sian wants to measure time.right? The only instrument that we can measure time in the given list is the stopwatch. So the answer is stop watch :) Understand ?
batspy
  • batspy
thanks
Rushwr
  • Rushwr
no problem :)

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