A beam of light travels from sapphire into an unknown material. The angle of incidence is 24o and the angle of refraction is 29.5o. What is the refractive index of the unknown material? What material is this likely to be

I'm not sure what your asking buddy.. but i know that you can weld two peices of steel by pure force and pressure.

At maximum height, kinetic energy is converted in potential energy  formula: at max height, ke = ½ * 0.27kg * (16m/s) ² = 34.56 j  so the remaining pe = (41.70 – 34.56)= 7.14 j = 0.27 kg * 9.8m/s² * h  = (9.8/7.14 * 0.27)so max height h = 5.08 or 5 m