A thermostat on the wall of your house keeps track of the air temperature. This

Question

A thermostat on the wall of your house keeps track of the air temperature. This simple approach is of little use in the large volume of a covered sports stadium, but there are systems that determine an average temperature of the air in a stadium by measuring the time delay between the emission of a pulse of sound on one side of the stadium and its detection on the other.

Explain how such a system works using the word bank and passage below.

Word Bank-

dependence of the speed of sound on temperature

divide the path length

multiply the speed of sound

depends

speed of sound

coefficients of the thermal expansion of the materials the stadium is built with

doesn't depend

path length

The speed of sound in the air is __________________ on the temperature of the air.

Knowing the __________________ it is possible to find corresponding temperature of the air by finding the ___________precisely enough (to do so one needs to _______________by the time betweeen the emission and detection of the pulse).

Explanation / Answer

The speed of sound in the air depends on the temperature of the air.

Knowing the dependence of the speed of sound on temperature it is possible to find corresponding temperature of the air by finding the speed of sound precisely enough (to do so one needs to divide the path length by the time betweeen the emission and detection of the pulse).

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