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larisa86 [58]
4 years ago
13

Summarize what you read on the three websites you visited by identifying the advantages and disadvantages of using plastics.

Physics
2 answers:
BartSMP [9]4 years ago
7 0

Answer:

Sample Response: The properties of plastics make them useful in making products that are beneficial to society. Plastics and their production are costly, and are harmful to the environment, to humans, and to many other organisms.

did the test

nexus9112 [7]4 years ago
3 0
There are both advantages and disadvantages in using plastics:
The advantages are:
Plastic is cheap to manufacture because it is easy to mold. It is light but durable and unbreakable. Plastic does not rust and it is water resistant. 
Plastic is reusable over and over again and when it is worn, the cost of replacement is cheaper than glass or rubber. It is odorless and chemical resistant.
The disadvantages of plastic are:
Plastic can cause cancer. Recycling plastic can cause toxic chemicals to be released during the process. It has low heat resistance and melts when placed near fires. Plastic containers for food absorb the smell of the food even when washed thoroughly. Small parts in plastic toys can cause choking in small children, the same with plastic bags when accidentally wrapped around children's heads. Plastics can clog up sewer systems when people through them away indiscriminately.

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ollegr [7]
<span>F = ma
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<span>So we have: </span>

<span>Ff = μmg </span>

<span>And </span>

<span>Ff = ma </span>

<span>So... </span>

<span>μmg = ma </span><span> </span>

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<span>And we can solve for the acceleration: </span>

<span>(0.15)(9.81 m/s²) = a </span>

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8 0
3 years ago
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grigory [225]

Answer:

14 seconds

Explanation:

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3 years ago
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3 years ago
As a clinical chemist in charge of the testing of blood samples. You are required to mix a solution of sodium chloride with wate
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4 years ago
Assume that the complete combustion of one mole of ethanol to carbon dioxide and water liberates 1370 kJ of energy (Δ????°′=−137
Nikitich [7]

Answer:

28 moles of X.

Explanation:

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C₂H₆O(l) + 3 O₂(g) ⇒  2 CO₂(g) + 3 H₂O(l)

When 1 mole of ethanol burns it releases 1370 kJ, that is, the enthalpy of combustion is -1370 kJ/mol. If the energy released by one mole of etanol were used to syntesize the compound X, it would take 45.9 kJ to form 1 mole of X, that is, the enthalpy of formation is -49.5 kJ/mol. Then,

1mol(etanhol).\frac{-1370kJ}{mol(etanhol)} .\frac{1mol(X)}{-49.5kJ} =28mol(X)

8 0
4 years ago
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