A rotating space heater used 1400 joules of energy while heating a room. Of that total 896 joules produced thermal energy
To determine the percentage of energy that was converted into thermal energy, we need to divide the thermal energy produced by the total energy used and multiply by 100.
The percentage of energy converted into thermal energy = (thermal energy / total energy) x 100
Given:
Thermal energy produced = 896 joules
Total energy used = 1400 joules
Percentage of energy converted into thermal energy = (896 / 1400) x 100
Calculating:
Percentage of energy converted into thermal energy = 0.64 x 100
= 64%
So, 64% of the total energy used by the rotating space heater was converted into thermal energy.