Question

(a)

A well-insulated electric water heater warms 121 kg of water from 20.0°C to 47.0°C in 27.0 min. Find the resistance (in Ω) of its heating element, which is connected across a 240 V potential difference.

  Ω

(b)

What If? How much additional time (in min) would it take the heater to raise the temperature of the water from 47.0°C to 100°C?

  min

(c)

What would be the total amount of time (in min) required to evaporate all of the water in the heater starting from 20.0°C?

  min

Answer 1