If a hair dryer is rated at 800W, how much energy does it require in 3 min?
energy=power*timeinseconds
To calculate the energy consumed by a hair dryer in 3 minutes, we can use the formula:
Energy = Power × Time
Given that the hair dryer is rated at 800W and the time is 3 minutes, we can substitute these values into the formula:
Energy = 800W × 3 min
However, before we can proceed with the calculation, we need to ensure that the units are consistent. Since the time is given in minutes and the power is given in watts, we need to convert the time to seconds because watts and seconds are the standard units of energy measurement.
1 min = 60 seconds
Therefore, 3 minutes = 3 × 60 seconds = 180 seconds.
Now, we can substitute the values into the formula:
Energy = 800W × 180 seconds
Finally, we can calculate the energy consumed:
Energy = 144,000 joules (J)
Therefore, the hair dryer requires 144,000 joules of energy in 3 minutes.