The purpose of the lab is to acquire the percent composition of zinc and copper. The procedure included obtaining a post 1983 penny and washing it with soap and water. Using a triangular file, we made an X on the penny. Then, we cleaned the top and bottom of the penny with steel wool until it was shiny. We rinsed the penny in acetone and dried it with paper towel.
That is why I am supporting the retirement of the pennies. With me supporting the retirement of the penny I have some evidence on why the penny should be retired. One piece I have is in the article it states that it costs 11 million dollars to make pennies in other countries. That it is a lot of money being used even though the penny doesn’t really get used, it just gets pushed to the side and never gets used. They could be doing more with the 11 million dollars.
Error Analysis We may have made a few errors along the way. We could have had a blunder because we may not have waited long enough for the penny to stay on the scale. We could have made a human error because we could have had a little more or less sodium hydroxide in our graduated cylinder and eyeballed it wrong. Another error you could have made was an instrumental limitations because read the cylinder wrong on the side by
The penny costs more than it is worth. Millions of dollars are going to waste into producing them and it can just add the money up. The cost of producing and distributing one pennie is 2.4 cents(Sommer). Every penny that is made, taxpayers lose money.
For many years people have been fighting to eliminate pennies for many reasons. One of the most popular reasons to eliminate pennies is that pennies cost more to produce than the actual worth of the penny. “The united States government lost $60.2 million on production and distribution of pennies in 2011,” (Sommer) wrote, source #1. (Sommer) also wrote that Each zinc and copper coin cost 2.41 cents to produce and distribute”. Meanwhile a penny is only worth 1 cent.
Daphnia Magna are small crustaceans that are excellent for observing the effect of depressants on their nervous system. The purpose of this specific experiment is to observe the effect of ethanol, aspirin, and caffeine on daphnia’s heart rate. Not only do these chemicals affect heart rate, but they also affect the frequency of reproduction, number of eggs produced, and body structure. Pesticides similar to these chemicals can be released into the environment and daphnia re useful in monitoring toxicity levels. The agents being tested in this experiment can be administered to determine the effects of hormones, stimulants, antidepressants, and neurotransmitters. The hypothesis for this experiment is that if daphnia are exposed to ethanol, aspirin,
Pennies are rarely made of copper anymore, but instead, mainly zinc. In his “Ban the Penny” article, Mark Lewis recognizes the penny argument and states “But the penny has its fans, especially in Tennessee, which is rich in zinc.” (Source A). Tennessee makes
Copper Cycle Lab Report Ameerah Alajmi Abstract: A specific amount of Copper will undergo several chemical reactions and then recovered as a solid copper. A and percent recovery will be calculated and sources of loss or gain will be determined. The percent recovery for this experiment was 20.46%.
Don’t you hate when your taxes go to making useless pennies or when they take up space in a mess. Even though people think pennies are helpful they are not because they cost 2.41 to make just one. For years the Unites States have been discussing if we should get rid of the penny. Pennies shouldn’t be made in the United States. Source 1 states, other countries have got rid of the penny and were successful.
Unknown number of 1 oz. silver coins in sealed plastic rolls Unknown number of silver coins in vacuum sealed sheets, unknown number of sheets Unknown number, denomination or weight of gold coins Estimated value $10,000 (2) 1 pint mason jars of pennies one full one half full (2) 1 pint mason jars of nickels one full one half full (3) 1 pint mason jars of dimes two full one half full (2) 1 pint mason jars of quarters one full one half full Unknown
Stated in Source 4 “The penny should stay” by Grace Harter. If the penny was so popular like source 4 states, why does it state otherwise in source 3 “Abolish the Penny” by William Safire, “Two-thirds of them immediately drop out of circulation, into piggy banks or—as The Times’s John Tierney noted five years ago—behind chair cushions or at the back of sock drawers next to your old tin-foil ball. Quarters and dimes circulated; pennies disappear because they are literally more trouble than they are worth.” summarizing that all up, the majority of the time people just toss pennies to the side, they are useless and should be abolished.
Unknown Lab Report Mikee Lianne Gonzales Biol 351- 1005 Holly Martin Unknown: # 76 Abstract This report is about identifying the respective genus of the given unknown organism. The goal is to show and prove the student’s understanding of microbiology and laboratory learned experimental techniques.
Senses: How we Identify Different Flavors of Food Aim: To be able to identify the five different fruit flavors of skittles by using the sense of taste, while the participants of this experiment are blindfolded. Research Question: How are we able to identify the five different fruit flavors of skittles (strawberry, orange, grape, lime, and lemon) by only using our sense of taste? Hypothesis: I believe that the blind fold will make it harder for the participants to determine what fruit flavored skittle they have just ingested. This may also alter their perception of taste.