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The Ultimate Strength Of Rocks The Resistance of Rocks and Minerals

The Ultimate Strength Of Rocks The Resistance of Rocks and Minerals. By: Kevin Roby Josh Miller José Morales. Introduction.

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The Ultimate Strength Of Rocks The Resistance of Rocks and Minerals

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  1. The Ultimate Strength Of RocksThe Resistance of Rocks and Minerals By: Kevin Roby Josh Miller José Morales

  2. Introduction • This research will help know which minerals would be the best for use in making different types of structure say you were to use the rock Obsidian for say a sidewalk now how would you know how much resistance it how to shock without our research how do construction workers know which minerals or rocks to use for construction this experiment will help the construction workers know which rocks to use.

  3. What type of rock will withstand the highest impulse? Research Problem Impulse- a Newton times seconds

  4. Hypothesis • If a person tests six different samples of rocks for the ultimate strength by finding the impulse, then the sample Halite will prove to withstand a higher impulse resistance, because of its cubic crystal structure and flat surfaces.

  5. Variables • Independent variable: The mass and acceleration of the rocks. • Dependent variable: Impulse • Controlled variable: The height of the drop of the rocks.

  6. Materials • 6 Rock Samples: • Gypsum • Shale • Obsidian • Halite • Talc • Slate • Carjack • Scale • Wooden boards • Drill • Nuts and bolts • Duct tape • Long screws • Tape measure

  7. Gypsum • Chemical Formula: CaSO4·2(H2O) (calcium sulfate + water) • Hardness: 2 • VIDEO • http://webmineral.com/data/Gypsum.shtml

  8. Halite • Chemical Formula: NaCl (sodium chloride) • Hardness: 2.5 • VIDEO • http://webmineral.com/data/Halite.shtml

  9. Talc • Chemical Formula: Mg3Si4O10(OH)2 (magnesium tetrasilicon decaoxygen dihydroxide) • Hardness: 1 • Type of Rock: Sedimentary • Video • http://webmineral.com/data/Talc.shtml

  10. Mohs Hardness Scale 2.5 Fingernail 2.5–3 Gold or Silver 3 Copper penny 4-4.5 Platinum 4-5 Iron 5.5 Knife blade 6-7 Glass 6.5 Iron pyrite 7+ Hardened steel file 9 Diamond The hardness scale is a scale that helps us see which rock is the hardest for instance if it can be scratched by a fingernail such as talc it isn’t that hard. The hardest is diamond which can only be scratch by diamond.

  11. Methodology • The experiment will be conducted by dropping the rocks from Cessna Stadium from various intervals (5, 10, 15, 20 ft.). This is to find the impulse resistance of the sample.

  12. Procedure • 1. Secure two samples of each of the following rocks and minerals: obsidian, talc, shale, slate, gypsum, and halite. • 2. Take the mass of each sample and record the result. • 3. Measure out distances from the ground starting at five feet and increasing this by five feet until about 20 feet.

  13. Procedure (cont.) • 4. Take each sample and drop it from each height once, starting at five feet and increasing this until the sample shatters or a piece greater than about .5 in. by .5 in. breaks off. • 5. Record the height at which the sample broke. • 6. Use the height, mass, and velocity to find the impulse and kinetic energy.

  14. Procedure (cont.) • 7. Correlate the data into a chart showing the amount of impulse needed to fracture the sample and show which will have the greater tolerance to impact.

  15. Masses

  16. Results

  17. Results

  18. Final Results • Due to how the rocks broke it shows that the talc samples were able to withstand the most impulse. This proved that the stated hypothesis was null.

  19. Special Thanks • Ms. Vardy • Mr. Cicenas • Mrs. Morgan • Mr. Smith

  20. Works Cited • http://webmineral.com/data/Gypsum.shtm • http://webmineral.com/data/Halite.shtml • http://webmineral.com/data/Talc.shtml

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