Determine all missing variables. Show all your work. [T /5]
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The sound of a starting pistol can be heard easily from a distance of 800.0 m, but the smoke can be seen much sooner than the sound is perceived. Why is the smoke seen before the sound is heard? What is the time delay for the sound of the pistol if the air temperature is 15°C?
The reason why the smoke is seen before the sound is heard is because light travels much faster than sound. Light travels at a speed of approximately 299,792,458 meters per second in a vacuum, while sound travels at a much slower speed in air, approximately 343 meters per second at 15°C.
To calculate the time delay for the sound of the pistol, we can use the formula:
time = distance / speed
Given that the distance is 800.0 meters and the speed of sound is 343 meters per second, we can plug in these values to find the time delay:
time = 800.0 m / 343 m/s
time ≈ 2.33 seconds
Therefore, the time delay for the sound of the pistol at an air temperature of 15°C is approximately 2.33 seconds.