B= p=2a=2/16 10 ) 10 48x C 7-3-316 Practice 1) A metal cube of side 6 cm at 20°C on heating to 600°C increases by 0.3 cm Calculate a) The coefficient of linear expansion b) The coefficient of superficial expansion c) The coefficient of cubical (a) 86,2x1070 (b) 172.410/0 (c) 258.6x100 60

Three point charges, two positive and one negative, each having a magnitude of 20 μc are placed at the vertices of an equilateral triangle (30 cm on a side). what is the magnitude of the electrostatic force on the negative charge

Velocity is a description of both speed and direction, therefore it - a vector - a force arrow - the same as acceleration - a magnitude

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.