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Should You Wipe Off Your Sweat? Analytics Table
Income Estimates for Should You Wipe Off Your Sweat?
Based on this YouTube video's total view count of 704K views and industry-standard rates, the estimated total earning is $493 - $1.40K through ad revenue. Historical data is not yet available to calculate daily, weekly, or monthly averages.
About Should You Wipe Off Your Sweat?
Explore Should You Wipe Off Your Sweat? with 704,059 views, 29,864 likes, and 767 comments. Experience the impact of this video content that has captured audience attention.
Want to donate to the highest-impact charities AND get your donation matched up to $100? Visit https://Givewell.org/MinutePhysics If you’re in scorching heat, or when your body is working hard and you’ve got hot, hot sweat all over, sticky and stifling - does wiping off the sweat help you cool off? Or is it better to leave it on? Support MinutePhysics on Patreon! http://www.patreon.com/minutephysics Link to Patreon Supporters: http://www.minutephysics.com/supporters/ ********************************** REFERENCES Hyperphysics: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/sweat.html Engineering Toolbox Mollier Diagram: http://www.engineeringtoolbox.com/psychrometric-chart-mollier-d_27.html Sweat Info http://www.anaesthesiamcq.com/FluidBook/fl3_3.php Other articles: http://www.slate.com/articles/health_and_science/explainer/2012/06/should_you_wipe_away_your_sweat_or_does_that_keep_you_from_cooling_down_.html http://onlinelibrary.wiley.com/doi/10.1111/j.1748-1716.2012.02452.x/abstract http://lifehacker.com/5921036/dont-wipe-your-sweat-off-your-brow-itll-cool-you-down-faster http://www.realclearscience.com/2012/06/28/does_wiping_sweat_prevent_you_from_cooling_off_247729.html ********************************** CALCULATIONS Typical adult human body surface area ~ 1.5-2 m^2 https://en.wikipedia.org/wiki/Body_surface_area Evaporation rate at 25°C and 50% humidity, slight air movement (v~.5m/s) = .35kg/m^2/hr http://www.engineeringtoolbox.com/evaporation-water-surface-d_690.html So in these conditions, a sweat-covered human can expect to evaporate ~.5-.75 L of water in an hour (For higher humidity (60-70%) it goes to ~.37-.5 L of water/hr). That amounts to ~0.25-0.35mm of sweat (covering the whole body) evaporated in an hour, or 6 micrometers every minute. Water has latent heat of 2,270 kJ/kg (http://www.engineeringtoolbox.com/water-thermal-properties-d_162.html), so in an hour a human can lose ~1100-1700 kJ of energy. (2270/4.1868 ~ 542 Cal) BUT that assumes all of the energy came from the person. If some proportion of it came from the air (~1/3-1/2?) then the person is only cooled down partially. Mass of a human ~ 60-80kg (https://en.wikipedia.org/wiki/Body_weight), assuming ~specific heat of water, ie 4 kJ/kg/K, could decrease temp by ~4.5-5°C. Energy used in moderate-hard exercise is ~20-30 kJ/kg/30 min, or ~40-60kJ/kg/h (http://www.weightloss.com.au/weight-loss/weight-loss-tools/exercise-energy-charts.html). Let’s say 50kJ/kg/h, which for average human amounts to 3000-4000 kJ/hr ********************************** MinutePhysics is on twitter - @minutephysics And facebook - http://facebook.com/minutephysics Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Created by Henry Reich
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