An electric heater used to boil small amounts of water consists of a 15- coil that is

Question:

An electric heater used to boil small amounts of water consists of a 15-Ω coil that is immersed directly in the water. It operates from a 120-V socket. How much time is required for this heater to raise the temperature of 0.50 kg of water from 13 °C to the normal boiling point?