Describe how the following have been replaced due to science and technology. Horse and cart to carry goods from place to place.

Determine el momento angular de un rueda de 3000g moviendose a 10m/s con un radio de giro de 400cm

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.

Photons with the highest energy have the longest period