Suppose a lever lets you lift a rock weighing 60 newtons when you apply an effort force of 12 newtons. what is the levers mechanical advantage

Adouble-slit experiment is performed with light of wavelength 600 nm. the bright interference fringes are spaced 1.8 mm apart on the viewing screen. what will the fringe spacing be if the light is changed to a wavelength of 400 nm? ?

Lightning is an example of what phenomenon? a release of a large amount of energy an absorption of a large amount of energy a natural electric circuit a natural electric current

Why does gravity have a lesser than grater effect on higher altitudes?