Answer: Option (A) is the correct answer.
Explanation:
The given data is as follows.
Power = 1.200 kW, Time = 15 minutes = [tex]\frac{15min}{60 min/hr}[/tex] = 0.25 hour
Energy = ?
Thus, calculate the energy by using the formula as follows.
Power = [tex]\frac{Energy}{Time}[/tex]
Energy = Power × Time
= 1.200 kW × 0.25 hr
= 0.300 kWh
Thus, we can conclude that 0.300 kWh energy is used in drying your hair.
The energy of the hair drier is 0.3 kWh. The right option is A. 0.3 kWh
To calculate the energy used to dry the hair, we use the formula below.
Formula:
Where:
Make E the subject of the equation.
From the question,
Given:
Substitute these values into equation 2
Hence, The energy of the hair drier is 0.3 kWh. The right option is A. 0.3 kWh
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