a spring can be stretched up to its breaking point by a constant force of 3N, 40cm length of the spring is streched through 0.7cm by a force of 0.8N. what will be it's new length when a force of 4N is applied?​

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.

Arowboat passenger uses an oar to push the boat off the dock by exerting a force of 40n for 3.0s. what impulse acts on the boat.

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