One watt (w) is equal to 1 j/s. assuming that 5.0% of the energy output of a 75 w light bulb is visible light and that the average wavelength of the visible light is 550 nm, how many photons are emitted by the light bulb per second?

Not sure.

Explanation:

You may have to use the oppisite operations in order to seek the answer.

dec 23, 2016 - a load of bricks weighing 680 n a distance of 10 m across a parking lot. if if the worker pushes the cart with a constant force of 209 n, what work= force x distance = 220 n x 10 m = 2200 n.m = 2200 j i don't know where the person got it from, but the initial part, work= force x distance me.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me