He's 76.2 W lightbulb uses 66.2 J of electrical energy every second. However, only 4.9 J of electrical energy is converted into light energy of each check and what is the efficiency of the lightbulb? Give your answer as a percentage to at least three decimal places

7.402%

Explanation:

Given that the total electrical energy used by the bulb in every second is 66.2 J.

The useful energy converted to light energy is 4.9 J.

As efficiancy (in %) = (Useful energy)/(Total energy) x 100

So, the efficiency of the bulb = (4.9/66.2)x100=7.402%

Hence, the efficiency of the bulb is 7.402%.

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.

the answer is a. the yacht traveled from the dock north to the 200-meter marker in the bay in less than 5 minutes, giving the passengers several more hours to fish.

im doing peak rn so sry if its wrong