Using a Cricket as a Thermometer
All chemical reactions, whether organic or inorganic, proceed at a rate that depends on temperature—the higher the temperature, the higher the rate of reaction. This can be understood in terms of molecules moving with increased energy as the temperature is increased, and colliding with other molecules more frequently. In the case of organic reactions, the result is that metabolic processes speed up with increasing temperature.
An increased or decreased metabolic rule can manifest itself in a number of ways. For example, a cricket trying to attract a mate chirps at a rate that depends on its overall rate of metabolism. As a result, the chirping rate of crickets depends directly on temperature, in fact, some people even use a pet cricket as a thermometer.
The cricket that is most accurate as a thermometer is the snowy tree cricket (Oecanthus fultoni Walker). Its rate of chirping is described by the following formula:
N = number of chirps per 13.0 seconds = T − 40.0
In this expression, T is the temperature in degrees Fahrenheit.
If the temperature is 43 degrees Fahrenheit, how long does it take for the cricket to chirp 12 times?
A. 12 s
B. 24 s
C. 43 s
D. 52 s
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