Answer:
water flows easier in the mountains because there is less air pressure.
The bending of light rays is the result of refraction of light passing through the lens. A converging lens is curved on both sides such that the rays coming out of it come together at a point (converge). The point at which the right rays meet after refraction is called the focal point which is a real in the convex lens.
Answer:
the name of the SI unit for force is the newton
i added an image. i hope it helped :)