When two or more waves combine to produce a new wave, that's 'interference'.
-- If the new wave has larger displacements (amplitude), then it's <em>CON</em>structive interference.
-- If the new wave has smaller displacements (amplitude), then it's DEstructive interference.
I’m not sure I’m just gonna assume that the flashlight closed too the wall is gonna be brighter because most of it’s light is directed on the wall rather then the one further back is kinda pointed everyone else & I think it relates to stars as if the brighter the star the closed it is to earth ?
Weight is based on density mass is not.
It takes about 27.32 days
Work = (force) · (distance)
a). The wind does work on the windmill.
b). The person does work on the box.
c). The metal bar exerts force on the leaning wall,
but nothing moves, so there's no work done.
d). The explosive inflator does work on the airbag, and very soon
after that, the driver and passengers do work on it too.