sian wants to measure the number of seconds that it takes for the contents of a beaker to change from clear…

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
Answer
Brief Explanations:
An electronic balance measures mass, a barometer measures air - pressure, a graduated cylinder measures volume. A stopwatch is used to measure time in seconds.
Answer:
a stopwatch