What is the mechanical advantage of a lever that has an input arm of 6 meters and an output arm of 2 meters

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two