OR
B2) Develop a story with the help of
the following guidline. Give it a suitable
title. You may begin like
Once there ....... a farmer ....... works hard in his field...... gets tired ........
at night fast asleep .......thieves arrive dog bark loudly....... distubrs the farmer
gets angry ....... wants to beat the dog ....... throws his spade ....... the dog dies
on the spot ....... the thieves escape with his money and valuables ....... the
farmer gets up in the morning .......repents ....... feels very sad.
Answers
Answer:Power of water =2 kw=2000w
Mass of water =200kg
difference in temperature ΔT=70−10=60
o
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
3
sec.
Explanation:Power of water =2 kw=2000w
Mass of water =200kg
difference in temperature ΔT=70−10=60
o
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
3
sec.
Power of water =2 kw=2000w
Mass of water =200kg
difference in temperature ΔT=70−10=60
o
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
3
sec.Power of water =2 kw=2000w
Mass of water =200kg
difference in temperature ΔT=70−10=60
o
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
3
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Answer:
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