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6 Oct 2020
The speed of sound in air (in meters per second) depends on temperature according to the approximate expression
v = 331.5 + 0.607Tc
where Tc is the Celsius temperature. In dry air, the temperature decreases about 1°C for every 150-m rise in altitude. (a) Assume this change is constant up to an altitude of 9 000 m. What time interval is required for the sound from an airplane flying at 9 000 m to reach the ground on a day when the ground temperature is 30°C? (b) What If? Compare your answer with the time interval required if the air were uniformly at 30°C. Which time interval is longer?
The speed of sound in air (in meters per second) depends on temperature according to the approximate expression
v = 331.5 + 0.607Tc
where Tc is the Celsius temperature. In dry air, the temperature decreases about 1°C for every 150-m rise in altitude. (a) Assume this change is constant up to an altitude of 9 000 m. What time interval is required for the sound from an airplane flying at 9 000 m to reach the ground on a day when the ground temperature is 30°C? (b) What If? Compare your answer with the time interval required if the air were uniformly at 30°C. Which time interval is longer?
Manoj PandeyLv10
30 Jan 2021
