iv) Calculate the period of time, in seconds, during which the 600 Jis provided to the 30 W light bulb. Time=

The question is asking us to determine the period of time during which a certain amount of energy (600 Joules) is provided to a light bulb of certain power (30 Watts). In physics, power is the rate at which energy is transferred, or the amount of energy transferred or converted per unit time. It can be mathematically expressed as . Therefore, to get the time, we just solve for it in terms of energy and power, i.e. . Here, the energy is 600 Joules, and the power is 30 Watts, both in measures consistent with the physics standard unit system.