Answer:
0.075 kJ
Explanation:
To calculate the energy used by a 75 Watt light bulb when turned on for one second, we can use the formula:
Energy = Power x Time
where power is measured in watts and time is measured in seconds.
In this case, the power is 75 watts and the time is 1 second, so we can calculate the energy as:
Energy = Power x Time
Energy = 75 watts x 1 second
Energy = 75 joules
Note that joules (J) are the standard unit of energy in the International System of Units (SI). To convert joules to kilojoules (kJ), we divide by 1000. Therefore, the energy used by the 75 watt light bulb when turned on for one second is:
Energy = 75 joules = 0.075 kJ (to the nearest thousandth)
So the answer is 0.075 kJ.