Work, Energy, and Power / Climbing Mountains [Part 19/20] Print
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Written by Thatcha Namnon   
Monday, 15 February 2016 10:55

How to calculate how many calories it a hiker to hike up a 10,000 foot mountain.

ที่มา :  http://www.youtube.com  อัพโหลดโดย  Michel van Biezen