Please help, is an electric lamp a luminous object?​

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

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.