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28-04-2024
Physics

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4.4 Electric heater is marked 3000 W. What is the cost of heating the room using this heater for one day, if the electricity costs 70c per kWh? TOTAL

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timmyshow08 timmyshow08

28-04-2024

Answer:

$50.40

Explanation:

Power = 3000 w

since 1kw= 1000w

power = 3kw

The formula;

Energy = power × time

Energy = 3kw×24hours

= 72kWh

Cost at 70c per kwh

70/100

= 0.70kwh

Cost per kwh= Energy × cost

= 72kwh × 0.70kwh

=$50.40

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