5.
a 28 kg child on a swing is traveling at 4.2 m/s and has 315 ) of total mechanical energy. what is his
gravitational potential energy? how high is he above the ground?

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.

What are similarities and differences of reflection, refraction, diffraction and absorption?

Aphase diagram assumes is kept constant.