Atrain travels 63 kilometers in 2 hours, and then 56 kilometers in 3 hours. what is its average speed? i need the answer and units

Identify the arrows that show the correct direction of heat transfer. 66°f 112°f 98°f

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

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.