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23 Nov 2019
Suppose that a storm cloud has a potential differenceof30*106 V relative to a tree. a. If during a lightning strike, 50 C of charge istransferredthrough this potential difference, determine how muchenergy istransferred from the cloud to the tree. b. Suppose that 2.4% of the energy computed in part (a)isabsorbed by the tree, determine how much water (sap in thetree)can be boiled away, starting at 30oC. Assumethatwater has a specific heat of c = 4186 J/(kg * oC),aboiling point of 100oC, and a heat of vaporization ofh= 2.26*106 J/kg. Note that c is the energy neededtoheat one kilogram of water by 1oC, and h is theenergyneeded to boil one kilogram of water.
Suppose that a storm cloud has a potential differenceof30*106 V relative to a tree.
a. If during a lightning strike, 50 C of charge istransferredthrough this potential difference, determine how muchenergy istransferred from the cloud to the tree.
b. Suppose that 2.4% of the energy computed in part (a)isabsorbed by the tree, determine how much water (sap in thetree)can be boiled away, starting at 30oC. Assumethatwater has a specific heat of c = 4186 J/(kg * oC),aboiling point of 100oC, and a heat of vaporization ofh= 2.26*106 J/kg. Note that c is the energy neededtoheat one kilogram of water by 1oC, and h is theenergyneeded to boil one kilogram of water.
Collen VonLv2
3 Aug 2019
