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Answer to Question #77706 in Physics for Ehsan
Question #77706
A carpet cleaning machine holds 40litres of water. It is filled with water at 15∘C and the water is heated by a 3.0kW element to a temperature of 70∘C.
How much energy is added to the water? [Mass of 1.0litre=1.0kg; s.h.c.=4200J/(kgK)]
How much energy is added to the water? [Mass of 1.0litre=1.0kg; s.h.c.=4200J/(kgK)]
Expert's answer
Q=mc∆T
Q=(40)(4200)(70-15)= 9200000 J=9.2 MJ.
Q=(40)(4200)(70-15)= 9200000 J=9.2 MJ.
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