Answer:
Demand for recycled paper has increased as consumers have become more aware of the environmental issues surrounding waste disposal. Paper is a natural raw material made from renewable wood and plants. Recycled paper is made from waste paper and paperboard. Both new paper and recycled paper contain traces of heavy metals. However, some types of recycled paper contain more heavy metals than new paper due, in part, to the inks used for printing or adding color to the original paper. Metals can migrate from the paper packaging and containers used for food to the food itself. This metal migration is controlled and monitored to reduce the exposure of humans to heavy metals. Food agencies in each country determine the limit of cadmium, zinc, nickel, and copper in packaging materials. Most countries impose a limit of heavy metals in recycled paper not to exceed 100.0 ppm or 100.0 . The limit for lead in eggfruit, or vegetable-packaging is lower-not to exceed-20.0 mg/kg. The table in Figure a lists the results of the analysis of samples of recycled paper produced by a manufacturer during a three-month period. The goal of the manufacturer is to reduce the amount of heavy metals-especially lead-in the recycled paper it produces and sells. From March to May, the manufacturer varied the
methods of production each month to determine which method would produce paper with the lowest metal content. Each month, lab technicians cut small samples of recycled paper with an area of 1.000 and a thickness of 0.0500 The technicians then prepared the samples for analysis. The average density of the samples is Use the information provided in the figure to answer the
following questions:
a. Did the company reduce the amount of lead in its product between March and May?
b. Which metal was not reduced?
c. Each month's sample represents a different manufacturing process. Which process would you recommend the manufacturer choose to continue to use over the next year while additional processes are tested? Why?
d. What is the total amount of the five metals for the April sample (in mg/kg)?
e. What is the total mass (in mg) of the five metals for the April sample found in the 1.000 sample?
f. Lead has four stable isotopes: 204
Explanation:
so this problem gives us a lot of information and asked us to answer several questions. So, Letter A says, did the company make reduce the amount of lead in its product between March and May? And the answer is yes. The PB levels went from 3.5 to 2.8 22.4, so it was reduced. Be asks which medal was not reduced. And that would be sync because England from 2.723 point 2.723 2 to 3.7 so zinc increased. It was not reduced. See says each month sample represents a different manufacturing process.
Answer:
Thomas Paine (1737-1809) was an American political activist, theorist, and a philosopher. Paine is the author of the famous pamphlets, including "The Age of Reason", "Rights of Man" (defending the French Revolution), and "Common Sense" (written during the American Revolution). Paine is believed to have inspired the patriots, his intended audience, to become independent from Great Britain in 1776. His writing style is often characterized by arrogance, as in pamphlet series <em>An American Crisis.</em>
Anne Bradstreet (1612 - 1672) was a poet and the first woman in America to write a book of poems. When she began writing, her poems were meant to educate her children about the hardships she went through. Her husband and children were her only audience, but she gradually became popular in her society. She wrote warm, love poems for her husband and children, but also religious poems. In some of her works, we can clearly notice her sarcastic tone towards the society and its norms.
<em><u>Answer:</u></em>
<em>"Full worthy was he in his liege-lord's war, </em>
<em>And therein had he ridden (none more far) </em>
<em>As well in Christendom as heathenesse, </em>
<em>And honoured everywhere for worthiness.
</em>
<em>At Alexandria, he, when it was won;"</em>
<u><em>Explanation:</em></u>
The narrator describes the gathering individuals as indicated by their social positions. The pilgrims speak to a various cross-area of fourteenth-century English society.
Answer:
C. Both eventually came to believe that the Rosetta Stone hieroglyphs represented sounds rather than things.
Explanation:
The c. volcanologist worked to determine when the volcano would next erupt.
