Gasoline car and electric car is equally energy efficient.
True or false?
The diagram shows an electric water heater.
This electric water heater has a 3.4kW of electrical power and 9.17 A current.
Calculate its voltage, V.
Hani watched a Korean drama on television for 3 hours.
The television has an electric power of 3.2kW.
Calculate the cost of electrical energy used if a unit of energy cost 30 cents.
Buying electrical appliances with a one-star energy-efficient label will save electrical energy.
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