On his biking exercise, Albert rides 15 Km south. He sees a dead end so he turns back and heads 4 Km north. He then continues for 1 km north
until he stops for a break. What distance did he cover? *

How many seconds does it take a pebble released from rest off a bridge to fall 29.4 m ? what is the pebble's speed when it has fallen 29.4 m ?

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

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.