find the electrical enery expended by electric lamp labeled 100w in 8 seconds
energy = power * time
To find the electrical energy expended by an electric lamp, we need to use the formula:
Energy (in joules) = Power (in watts) × Time (in seconds)
In this case, the power of the lamp is given as 100 watts, and the time is 8 seconds. Using the formula, we can calculate the energy as follows:
Energy = 100 watts × 8 seconds
Energy = 800 joules
Therefore, the electrical energy expended by the 100-watt electric lamp in 8 seconds is 800 joules.