Standard electric outlets in the United States run at 120 V; in England, outlets

Question

Standard electric outlets in the United States run at 120 V; in England, outlets are 230 V. An electric kettle has a coiled wire inside that dissipates power when it carries a current, warming the water in the kettle. A kettle designed for use in England carries 13 A when connected to a 230 V outlet.
                                                                   
A. What is the resistance of the wire?
B. What power is dissipated when the kettle is running?
C. The kettle can hold 1.7 L of water. Assume that all power goes to heating the water. How long will it take for the kettle to heat the water from 20

Explanation / Answer

P=V^2/R

specific heat of water = Sw

epecific heat of kettle= Sk

mass of water= Mw=1700cc*1g/cc=1.7 kg
mass of kettle= Mk

Q=(MkSk+MwSw)(100-20)

P=Q/t
t=Q/P

It will give u time

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