Fan -- 15W
Heating elements -- 1.2kW
Mains -- 240
A) calculate the weekly cost of having the fan heater with the warm air setting on for 3hours each day. Assume that the cost of electricity is 0.25 cents per kWh.
Physics, sorry and thanks !
cost= power*time*chargeperwatt.
To calculate the weekly cost of running the fan heater, we need to:
1. Determine the daily energy consumption of the fan heater:
- The fan consumes 15W for 3 hours per day, which equals (15W * 3 hours) = 45Wh or 0.045kWh.
- The heating element consumes 1.2kW for 3 hours per day, which equals (1.2kW * 3 hours) = 3.6kWh.
- Therefore, the total energy consumption per day for the fan heater is (0.045kWh + 3.6kWh) = 3.645kWh.
2. Calculate the weekly energy consumption:
- Multiply the energy consumption per day by the number of days in a week. Assuming a 7-day week, the weekly energy consumption is (3.645kWh * 7 days) = 25.515kWh.
3. Calculate the weekly cost:
- Given that the cost of electricity is 0.25 cents per kWh, we need to convert the cost to dollars per kWh.
- 0.25 cents = 0.25/100 dollars = $0.0025.
- Multiply the weekly energy consumption by the cost per kWh to find the weekly cost: (25.515kWh * $0.0025/kWh) = $0.0638.
Therefore, the weekly cost of running the fan heater with the warm air setting on for 3 hours each day would be approximately $0.0638.