Problem 132 change the internal energy of the water, and what frac- tion is used

Question

Problem 132 change the internal energy of the water, and what frac- tion is used to do work against the atmosphere? (As- sume that water vapor is an ideal gas.) 132. You are asked to help set up a historical display in the park by stacking some cannonballs next to a Revolu tionary War cannon. You are told to stack them by start- ing with a triangle in which each side is composed of four touching cannonballs. You are to continue stacking them until you have a single ball on the top centered over the middle of the triangular base. a. How many cannonballs do you need? b. What type of closest packing arrangement is dis- played by the cannonballs? c. The four corners of the pyramid of cannonballs form the corners of what type of regular geometric solid? 133. Consider the ionic solid A,B,y, which has the unit cell belou The R ions are nacked in a cubic arrangement

Explanation / Answer

We need 64 or multiple of 4 balls. The type of packing will be FCC or CCP . the four corner of triangular pyramids form tetragonal type of regular geometry a=b but c a= b = 90 c = 120

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