Final answer:
The bulb's power is calculated as the rate of energy transfer over time. With 40 joules of energy transferred in 1 second, the bulb's power is 40 watts.
Step-by-step explanation:
The question asks us to find the power of a bulb that transfers 40 joules (J) of energy in 1 second. In physics, power is defined as the rate of energy transfer, and its standard unit is the watt (W), which is equivalent to one joule per second (1 W = 1 J/s). Therefore, to calculate the power of the bulb, we simply need to use the formula:
Power = Energy / Time
In this case, the energy transferred is 40 joules and the time is 1 second, thus:
Power = 40 J / 1 s = 40 watts (W)
This calculation shows that the bulb's power is 40 watts. Remember that high power indicates a large amount of work or energy development in a short period. This concept of power is crucial in understanding how different systems consume energy over time, such as how a car engine operates or how much electricity a household appliance uses.