Pat, shannon and fido (their dog) are on a circular path 100 feet around. fido is very excited. shannon starts walking around the path maintaining a speed of 1 foot per second, while pat stays still. fido begins racing back and forth between pat and shannon on the circular path along the section of the path shannon has not walked on. what is fido’s average speed if he has just returned to pat for the 5th time when shannon gets to the half-way point? **important** assume fido maintains a constant speed of 3 feet per second for this last run back to pat. **important** also, assume that fido met shannon at equally spaced moments in time (including the starting).

You are a researcher for a golf club manufacturer. you are given two identical looking cubes of a metal alloy. you are informed that they are made of the exact same material, but one is crystalline, whereas the other is amorphous. it is your job to determine which one is amorphous this one is more stress-resistant and is useful in reinforcing golf clubs. which of the following is the best way to determine which is which? a. determine the density of each cube. the more dense one is the amorphous solid. b. melt both cubes and look for a broader range of melting temperatures. the one that melts over a broader range of temperatures is the amorphous solid. c. determine the density of each cube. the less dense cube is the amorphous solid. d. melt both cubes and measure the range of melting temperatures. the one that melts over a narrower range of temperatures is the amorphous solid.