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Darya [45]
2 years ago
12

nhóm nguy cơ sinh vật, phương pháp phòng tránh phát tán vi sinh vật và cách xử lí khi bị phơi nhiễm với vi sinh vật trong phòng

thí nghiệm
Biology
1 answer:
WINSTONCH [101]2 years ago
4 0

Answer:

Washing hands daily and wear clean clothes.

Explanation:

Washing hands daily and wear clean clothes are the methods which prevent the spread of microorganisms and when exposed to microorganisms in the laboratory, we will have to use disinfectant in order to remove the microbes so that the solution or reactions are safe from the contamination. There are many methods such as sterilization as well as using chemicals is responsible for the removal of microorganisms.

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Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 5 liters of natural oil for every 3 liters of
ELEN [110]

Answer:

Total 495 liters of natural oil are needed.

Explanation:

It is given that Petrolyn motor oil is a combination of natural oil and synthetic oil. It contains 5 liters of natural oil for every 3 liters of synthetic oil.

It means the ratio of natural oil and synthetic oil is

\frac{\text{Natural oil}}{\text{Petrolyn motor oil}}=\frac{5}{5+3}=\frac{5}{8}

Let in order to make 792 liters of Petrolyn oil he needs x liters of natural oil.

It means the ratio of natural oil and synthetic oil is

\frac{\text{Natural oil}}{\text{Petrolyn motor oil}}=\frac{x}{792}

Equate both ratios,

\frac{x}{792}=\frac{5}{8}

On cross multiplication we get

8\times x=5\times 792

8x=3960

Divide both sides by 8.

x=\frac{3960}{8}

x=495

Therefore total 495 liters of natural oil are needed.

6 0
3 years ago
A device that uses wire streched across a fault to mesure horizontel movement of ground is called a
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<span> A creep meter uses a wire that stretches across a fault to measure horizontal movement of the ground, and a  </span>laser-ranging device uses alaser<span> beam & reflector to detect Horizontal fault movements. I hope this is right.</span>
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3 years ago
What type of molecules will create a solution when mixed with water
marta [7]

Answer:

soluble molecules

Explanation:

Soluble molecules dissolve completely when mixed with water, hence forming a solution

7 0
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Large populations of tortoises inhabited the Galapagos Islands before humans. When humans settled on the islands and introduced
sertanlavr [38]

Answer:it reached carrying capacity. the environment couldn't hold both the goat and tortises

Explanation:

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Why is it important to get enough iron in your diet
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This is because iron is used to make a protein called hemoglobin. This protein helps blood cells carry oxygen around the body.

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