OLD COINS TURN TO GOLD DESIGN: Problem or Research Question: How does zinc effects the color change in a copper penny? Hypothesis: If copper and zinc comes together‚ then it will form brass‚ which gives gold color to copper penny. Variables: There were no variables at this experiment PROCEDURES: Materials: Zinc (SN) filling‚ 3M NaOH solution‚ Copper penny‚ tongs‚ Hot plate‚ 100 ml beaker‚ 250 ml beaker‚ Bunsen burner‚ Water‚ Spoon. Procedure: First‚ we turned on the hot plate.
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exactly nine months after World War II more babes where born than ever before. Approximately 3.4 million babies where born in 1946 20 percent more than the previous year‚ the trend continued through 1947 with 3.8 million babies. The trend continued until 1964 when the trend finally lost steam and by that time just over 76 million babies where born‚almost 40 percent of the entire nations population at the time. This is where the name “baby boom” came from. A quote from a known historian by the name
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Materials: A large potato Two pennies Two zinc-plated nails or screws Three pieces of copper wire A very small light bulb or LED light 1) Get a potato and cut it in half. Then make a small slit in each half just big enough to put a penny into. 2) Cut two pieces of copper wire and wrap one around one of the pennies a few times‚ and wrap the other one around the other penny a few times as well. 3) Take a third piece of copper wire‚ and wrap it around one of the
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Tiffany Yuen Investigation 21: How Much Copper Is in the Coin? RC Bauer‚ JP Birk‚ DJ Sawyer We calibrated three different molarities of copper (II) nitrate. We tested for the %Transmittance of 1M‚ 0.1M‚ and 0.01M and plotted the data collected on a calibration curve based on concentration and absorbance. We used nitric acid to dissolve a penny to produce another copper (II) nitrate to test its %Transmittance and plot that on the graph to discover the concentration of that substance which came
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STATEMENT OF THE PROBLEM Main Problem: How can the ionization chamber detect if the environment is surrounded or has Radon? Sub- Problems: What are the primary sources of radon gas? What elements are found when radon decays? How can this gas cause different kinds of diseases? OBJECTIVE: Build a simple ionization chamber that is capable of detecting fairly low levels of radiation BACKGROUND OF THE STUDY Radon is a cancer-causing gas. It comes from the natural breakdown of uranium in soil
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easy. Batteries consist of two different metals suspended in an acidic solution. Copper and Zinc work well as the metals and the citric acid content of a lemon will provide the acidic solution. Batteries like this will not be able to run a motor or energize most light bulbs. It is possible to produce a dim glow from an LED. The picture at the top of this page shows a basic lemon battery‚ a lemon‚ copper penny and zinc coated nail. The lemon: A large‚ fresh‚ "juicy" lemon works best. The
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non-consumable anode such as lead. In these techniques‚ ions of the metal to be plated must be periodically replenished in the bath as they are drawn out of the solution.[2] The most common form of electroplating is used for creating coins such as pennies‚ which are small zinc plates
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Make a Carrot Battery This activity uses a common carrot and two different metals to make a enough electricity to run a small digital clock. Materials: Two Large Raw Carrots; 2 Pennies; 2 Large Galvanized Nails; 3 pieces of 6" long wire; Small Digital Clock (Tandy (Radio Shack) or Maplin - "Stick-on Timer" £3.50/ $4.99. The digital clock can be extracted from an inexpensive alarm clock or it can be purchased from an electronics store. Slice of about 1 inch from each carrot and discard. Place
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Cited: “2011 Annual Report.” Rep. United States Mint‚ Fall 2011. Web. 14 June 14‚ 2013. . Carroll‚ Joseph. "Penny Worth Saving‚ Say Americans." Gallup. Gallup‚Inc.‚ 17 July 2006. Web. 14 June 14‚ 2013. Hagenbaugh‚ Barbara. "A Penny Saved Could Become a Penny Spurned." USA Today. Gannett‚ 06 July 2006. Web. 14 June 14‚ 2013. Isidore‚ Chris Isidore. "Obama Wants Cheaper Pennies and Nickels." CNNMoney. Cable News Network‚ 15 Feb. 2012. Web. 14 June 14‚ 2013 Jacobe‚ Dennis. "Food Prices a Hardship
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say that I learned a lot from a chemistry class‚ and it will benefit me later in life. In this class‚ we learned a lot of tricks‚ but three of them were more interesting and important to me‚ dry ice and hot water‚ revealing fingerprints‚ and shiny pennies. The dry-ice demonstration was the best one that I’ve experimented‚ and I think it’s a great reaction to be used in multiple situations. First of all‚ dry ice is frozen carbon dioxide.(Pangler) Instead of melting‚ dry ice turns directly into carbon
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