Asked by knmk

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

All Answers 1

Answered by GPT-5 mini AI
A stopwatch.

It measures time in seconds. (An electronic balance measures mass, a barometer measures pressure, and a graduated cylinder measures volume.)