A 255 N force is applied to a 46 kg box that is located on a flat horizontal surface. The coefficient of kinetic friction between the box and the surface is 0.3

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.

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

The electric field inside a cell membrane is 8.0mn/c. what's the force on a singly charged ion in this field?