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phy131studiof15:lectures:chapter20 [2015/11/16 09:17]
mdawber [Melting Ice with Pressure]
phy131studiof15:lectures:chapter20 [2015/11/16 09:18]
mdawber [Pressure Melting: ice skates]
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 For an 80 Kg person, assuming a blade of 30 cm length and 0.5 mm wide, the pressure on each foot will be ~ 27 atm. Not so large, especially considering that the slope P Vs T for melting ice has such a large slope. This means that this pressure will change the melting temperature by less than 1 $^o$C! For an 80 Kg person, assuming a blade of 30 cm length and 0.5 mm wide, the pressure on each foot will be ~ 27 atm. Not so large, especially considering that the slope P Vs T for melting ice has such a large slope. This means that this pressure will change the melting temperature by less than 1 $^o$C!
  
-In fact the reason that iceskates work is because there is always layer of water on the surface of ice (as long as the temperature is above -35<​sup>​0</​sup>​C).+In fact the reason that iceskates work is because there is always layer of water on the surface of ice (as long as the temperature is above -35<​sup>​0</​sup>​C). More on this [[http://​mini.physics.sunysb.edu/​~marivi/​TEACHING-OLD/​PHY313/​doku.php?​id=lectures:​6|here]].
  
  
phy131studiof15/lectures/chapter20.txt ยท Last modified: 2015/11/16 09:42 by mdawber
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