In a Flask,114 $67.0 \mathrm {~W}$ Of Power,with Perfect Efficiency $15 ^ { \circ } \mathrm { C }$

question 111

Multiple Choice

In a flask,114.0 g of water is heated using $67.0 \mathrm {~W}$ of power,with perfect efficiency.How long will it take to raise the temperature of the water from $15 ^ { \circ } \mathrm { C }$ to $25 ^ { \circ } \mathrm { C } \text { ? }$ The specific heat of water is 4186 J/kg ∙ K.

• A)71 s
• B)4.1 s
• C)17 s
• D)320,000 s

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