Cycle II Materials Science

John Dewey HS

Mr. Klimetz

Mass of Tile ______ kg

Volume of Tile _____ mexp3

Density of Tile _____ kg/mexp3

Weight of Tile _____ N

Yield Stress of Tile _____ Pa

Mass of Brick ______ kg

Volume of Brick _____ mexp3

Density of Brick _____ kg/mexp3

Weight of Brick _____ N

Yield Stress of Brick _____ Pa

Mass of Glass ______ kg

Volume of Glass _____ mexp3

Density of Glass _____ kg/mexp3

Weight of Glass _____ N

Yield Stress of Glass _____ Pa

Tile:_____

Brick:_____

Glass:_____

1. Which of the materials you analyzed posses the greatest strength to weight ratio? Which possessed the smallest ratio? Briefly explain the importance and value of this ratio to engineers and architects which are considering the use of specific materials on one of their construction projects.

2. Suppose we were to place our brick on the floor and pile identical bricks on top of it, thusly creating a perfectly vertical stack. Based on your yield stress data, how many bricks could the bottom brick theoretically support just before failing? Approximately how tall would this stack be? (Think!)

3. Suppose we were installing a new bathroom floor made entirely out of the same tile we analyzed in our lab. If our new bathroom floor measured 5.00 m by 3.50 m, calculate (A) the total number of whole tiles that would be required to complete the job, (B) the amount of tile left over, (C) the amount of weight exerted on the floor by the tile, (D) the pressure exerted on the floor by the tile, and (E) the total material cost of the tile if each retails for $0.57.

4. Which type of ceramic possesses the best characteristics for structural (load-bearing) applications? Briefly explain.

5. Calculate the weight of a sheet of glass identical in thickness and character to that which we analyzed in lab but possessing a length of 1.40 m and a width of 0.90 m.

6. Suppose the sheet of glass in problem 5 was placed into a window frame and set in place. Calculate the pressure exerted on the bottom of the window frame by the glass (in Pa).