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

Question

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

rushwr · Answer

what do u think ?

batspy · Answer

i think barometer

rushwr · Answer

No Barometer is used to measure the atmospheric pressure. Out of all the instruments here only the stopwatch can measure time.

rushwr · Answer

Electrical balance is used to measure masses. ( small ones )
the graduated cylinder to measure volumes

batspy · Answer

a graduated cylinder my other answer wood be a graduated cylinder

rushwr · Answer

"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 · Answer

thanks

rushwr · Answer

no problem :)