1. Author: Tong Man Chung This work by Tong Man Chung from The Chinese Foundation Secondary School is licensed under a Creative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong License To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HKCreative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HK Study of Wind Chill Effect

2. Wind Chill Effect Measurement 1. One feels colder if it is more windy. 2. Such effect is mainly for mammals. 3. The ambient temp remains unchanged. Study of Wind Chill Effect This work by Tong Man Chung from The Chinese Foundation Secondary School is licensed under a Creative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong License To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HKCreative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HK

3. Wind Chill Table This work by Tong Man Chung from The Chinese Foundation Secondary School is licensed under a Creative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong License To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HKCreative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HK

4. Characteristics of the study 1. The Wind Chill Temp must < air temp 2. Such Measurement is valid only when -- Wind speed > 3 mph -- Air temp < 10 0 C -- Air speed in kmh -1 measured at 10m This work by Tong Man Chung from The Chinese Foundation Secondary School is licensed under a Creative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong License To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HKCreative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HK

5. Formula for student measurement T wc = 13.12 +0.6215T a – 11.37V 0.16 + 0.3965T a V 0.16 where T a : air temp, V: wind speed T wc : Wind Chill Temp This work by Tong Man Chung from The Chinese Foundation Secondary School is licensed under a Creative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong License To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HKCreative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HK

6. This work by Tong Man Chung from The Chinese Foundation Secondary School is licensed under a Creative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong License To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HKCreative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HK

7. Some common mistakes on students’ work 1. Wrong data: Temp too high, not windy enough 2. Wrong conclusion from wrong data: Wind Chill Temp > Air temp This work by Tong Man Chung from The Chinese Foundation Secondary School is licensed under a Creative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong License To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HKCreative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HK

8. What do teachers need to prepare beforehand? 1.Selecting suitable days in winter 2.Teaching students conversion of units 3.Teaching students basic Excel skills This work by Tong Man Chung from The Chinese Foundation Secondary School is licensed under a Creative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong License To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HKCreative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HK

9. For further study… 1.Investigating underlying reasons (of students’ conclusion): CFSS colder than Hon Wah 2.Investigating of other schools. This work by Tong Man Chung from The Chinese Foundation Secondary School is licensed under a Creative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong License To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HKCreative Commons Attribution-NonCommercial- ShareAlike 3.0 Hong Kong Licensehttp://creativecommons.org/licenses/by-nc-sa/3.0/hk/deed.en_HK