Proof: Let's pretend that everybody has their own unique hair count. Because there are about 7.8 billion people on the planet (cite a source), that means there is somebody out there with 7.8 billion hairs. But this can't happen! According to Flindt and Rainer's Amazing Numbers in Biology, adult men have 18,000 cm2 of skin and a maximum of 320 hairs per square centimeter. That means that even if there were some person out there that was ten times as big as the average and was completely covered in head hair, they'd only have \(\beginequation* 18,000\times10\times320=57,600,000 \endequation*\) hairs. There is no possible way for somebody to have 7.8 billion hairs. Therefore, hair counts must repeat, and some people have to share. Done!
Everybody Up 2 Student.epub
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This book is based on a commitment to teaching science to everybody. What may work for training professional scientists does not work for general science education. Students bring to the classrooms preconceived attitudes, as well as the emotional baggage called 'science anxiety'. Students may regard science as cold, unfriendly, and even inherently hostile and biased against women. This book has been designed to deal with each of these issues and results from research in both Denmark and the USA. 2ff7e9595c
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