Complete Question:
A hot water heater operating at 240 V supplies 9.07 x 10⁶ joules to a quantity of water to warm it to the desired temperature of 60°C. What is the cost of the energy if the rate is $0.131/kWh?
Answer:
The cost of the energy is $0.33
Step-by-step explanation:
Given;
quantity of energy supplied = 9.07 x 10⁶ joules
Converting this energy to kWh = 2.519 kWh
one unit of energy cost $0.131/kWh, then the cost 2.519 kWh will be calculated as follows;
1 kWh --------------------- $0.131/kWh
2.519 kWh ----------------- ?
= 2.519 (kWh) * $0.131/kWh
= $0.33
Therefore, if the hot water heater operating at 240 V supplies 9.07 x 10⁶ joules at the rate of $0.131/kWh, then the cost of the energy is $0.33.