Physics Fun?

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A rapidly spinning paddle wheel raises the temperature of 200 mL of water from 21C to 25C. How much (a) work is done and (b) heat is transferred in this process?

2007-12-01 09:55:34 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Physics

2 answers

aussiming there is no change in internal energy,

the work done is the heat transferred....

m = density x volume = 1000kg/m^3 x 0.2 = 200kg
q = mc(t2-t1)
= 200 x 1 (25-21)

q = 800 cal (heat transferred) = 3352 J (work done)

2007-12-01 10:36:21 · answer #1 · answered by jamesyoy02 6 · 0⤊ 0⤋

This is 'Fun' ? I wonder what work is like.

2007-12-01 09:59:26 · answer #2 · answered by za 7 · 0⤊ 3⤋