MAT 194-Project 1

# MAT 194-Project 1 - MAT 194 Precalculus Project 1 Crickets...

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MAT 194 Project 1 Precalculus Crickets – Nature’s Thermometer 1 Crickets – Nature’s Thermometer Lab Preparation Crickets are one of nature’s more interesting insects, partly because of their musical ability. In England, the chirping or singing of a cricket was once considered to be a sign of good luck. In China and Japan, they were kept in fancy cages in the house so the residents could enjoy their singing. Many of us are so used to hearing this sound on a summer evening that we would probably think that something was wrong if it were missing. The male cricket “sings” to attract the female cricket – not just to keep you up at night – and does this by rubbing his two front wings together. 1 One of the interesting facts about crickets is that their activity is dependent upon the temperature. As a result of this, they can be thought of as “natural” thermometers. The rate of a cricket’s chirp increases as the temperature increases and depends on the type of cricket. So if you know the right formula and the type of cricket you hear chirping, you can estimate the temperature by counting the chirps. Changes in humidity and different crickets of the same type also produce variations in a cricket’s chirping rate. The dominant factor, however, is temperature, so formulas relating temperature to the number of chirps are fairly accurate. Below are rules for finding the temperature, in degrees Fahrenheit, for three different types of crickets. 2 The field cricket is the black cricket that is commonly found in the United States. For a field cricket, you need to count the number of chirps in fifteen seconds and add 38 to obtain the temperature. The tree cricket is small, pale green and usually found on trees. For the cricket commonly called the tree cricket, the temperature can be obtained by counting the number of chirps in seven seconds and adding 46. The snowy tree cricket is the species whose music is most in tune with that of the

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## This note was uploaded on 12/21/2011 for the course MAT 194 taught by Professor Staff during the Fall '08 term at Syracuse.

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MAT 194-Project 1 - MAT 194 Precalculus Project 1 Crickets...

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