A 100-Watt light bulb plugged into a 120-Volt outlet is left on for 60 seconds. How much energy (in Joules) is used up by the bulb during this time?
Forget the voltage. It doesn't matter.
Power(W) x time(s) = energy
in Watt-seconds (Joules)
To calculate the amount of energy (in Joules) used up by the bulb, you can use the formula:
Energy = Power x Time
Given:
Power = 100 Watts
Time = 60 seconds
Step 1:
Convert the power from Watts to Joules per second (J/s). Since 1 Watt is equal to 1 Joule per second, we can use the given power directly.
Power = 100 Watts
Step 2:
Plug in the values into the formula:
Energy = Power x Time
Energy = 100 Watts x 60 seconds
Step 3:
Calculate the energy:
Energy = 6000 Joules
Therefore, the light bulb uses up 6000 Joules of energy during the 60 seconds it is left on.
To calculate the energy used by the light bulb, you can use the formula:
Energy (in Joules) = Power (in Watts) * Time (in seconds)
In this case, the power of the light bulb is given as 100 Watts, and the time it is left on is 60 seconds. So, you can substitute these values into the formula:
Energy = 100 Watts * 60 seconds
Energy = 6000 Joules
Therefore, the light bulb will use up 6000 Joules of energy during the 60 seconds it is left on.