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Answer:Power of water =2 kw=2000w
Mass of water =200kg
difference in temperature ΔT=70−10=60
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C
Concept
energy required to heat the water = energy given by water in time t=pt
energy required to increase tempeature of water by 60
o
C,Q=msΔT
S= specific heat =4200J/kg
o
C
pt=msΔT
2000×t=200×4200×60
t=25200
or t=25.2×10
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