Final answer:
The experiment described uses a whistle to generate sound and involves two people working with a stopwatch to measure the time it takes for sound to travel between them, highlighting the principle that sound has a finite speed.
Step-by-step explanation:
A whistle is needed for a restart in various circumstances in physical education activities such as sports and games. Here are a few examples:
1.In team sports like soccer or basketball, a whistle is necessary to signal the start of the game, the beginning of each half or quarter, or to restart play after a stoppage.
2.In track and field events, the whistle is used to signify the start of a race or the beginning of a timed event like the long jump or shot put.
3.In swimming competitions, a whistle is used to indicate the start of a race or event.
4.In physical education classes, a whistle can be used to get the attention of students and signal transitions between activities or exercises.
The question seems to refer to an experiment related to the speed of sound where a whistle is utilized as a sound source, and stopwatches are used to measure the time interval between seeing the sound made and hearing it. The circumstances described suggest that two people are coordinating to measure how long it takes sound to travel between two points. One person stands at one end with the whistle, while the other person stands far away with a stopwatch. The person with the whistle blows it, and the other person starts the stopwatch upon seeing the whistle blown and stops it when they hear the sound. This procedure is repeated several times to obtain an average time.
Certain familiarity with acoustic phenomena, stopwatch operation, and potentially the physics of sound propagation would be necessary to conduct this experiment. Additionally, it showcases the finite speed at which sound travels through a medium, such as air, and lays the groundwork for understanding more complex principles governing acoustics and wave propagation.