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ladessa [460]
3 years ago
8

Describe a way to separate iron filings from sand. Enter your answer in the space provided.

Chemistry
2 answers:
lisov135 [29]3 years ago
8 0
You can use a magnet to separate the iron from the sand. You can separate them because they are a mixture.
Lina20 [59]3 years ago
5 0
Use the magnetic force of iron filings
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A:Is a measure of energy
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Write a Scientific question for how temperature change affects gas inside a container
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How will gas be affected if the temperature in an enclosed container is to be changed?

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In 1930 the american physicist ernest lawrence designed the first cyclotron in berkeley, california. in 1937 lawrence bombarded
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cheryl has $56 and wants to buy as many notebooks as she can to donate to her school. if each notebook costs $1.60, which inequa
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For a lake in Michigan, researchers have determined that largemouth bass feed on smaller fish, which in turn feed on zooplankton
allsm [11]

Answer:

the expected decline in largemouth bass is 3,000 kg.

Option d) 3,000 kg is the correct answer.

Explanation:

Given the data in the question;

In 2016, there was 600,000 kg of zooplankton in the lake.

In 2017, an accidental runoff of insecticide near the lake caused a 50 percent decline of the zooplankton population in the lake.

Now,

The remaining mass of zooplankton  after the 50% decline will be;

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⇒ 600,000 × 50/100

⇒ 300,000 kg of zooplankton

Now, with 10 percent trophic efficiency;  smaller fish directly feed on zooplankton; decline in smaller fish mass will be;

⇒ 300,000 kg × 10%

⇒ 300,000 × 10/100

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Finally, with 10 percent trophic efficiency, largemouth bash directly feed on smaller fish, so the expected decline in mass of largemouth bash will be;

⇒ 30000 kg × 10%

⇒ 30000 kg × 10/100

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Therefore, the expected decline in largemouth bass is 3,000 kg.

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