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Masja [62]
4 years ago
11

How can a scientist test a hypothesis if it is not possible to do a controlled experiment.

Biology
1 answer:
serious [3.7K]4 years ago
3 0

Answer:

In an experiment, the researcher needs to have a control group with an experimental group where both groups are identical in every way except that the controlled group does not gets the experimental treatment.

Sometimes, it is not possible to do a test or the experiment utilizing a controlled trial (due to ethical reasons or no practical method available). All things considered, a researcher may test a theory by making predictions about outcomes or patterns that ought to be found in nature if the hypothesis is right.

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Describe three clean coal technologies and how they can mitigate the environmental impacts of coal. Explain how they work and pr
Andrej [43]

Clean coal technology refers to a gathering of technologies being created in order to reduce the environmental influence of coal energy production and to mitigate global climate change. There are three distinct technological procedures accessible for the aim of capturing carbon as demanded by the clean coal concept:  

1. Pre-combustion capture: This includes gasification of a feedstock like coal to generate gas that may be shifted to develop a mixture of carbon dioxide and hydrogen gas, from which the carbon dioxide can be effectively separated and captured, transported, and eventually sequestered.  

2. Post-combustion capture: This is the capturing of carbon dioxide from the exhaust gases of combustion methods.  

3. Oxy-fuel combustion: The fossil fuels like coal are combusted in a mixture of oxygen and recirculated flue gas, rather than in air that hugely withdraws nitrogen from the flue gas allowing capturing of low-cost and efficient carbon dioxide.  

An initial example of a coal-based plant utilizing carbon capturing technology is a Swedish company Vattenfall's Schwarze Pumpe power station situated in Germany.  


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3 years ago
Cancer is not usually inherited because Cancer is not usually inherited because the cancerous cells usually interfere with the a
kkurt [141]
But the DNA in the woman's eggs is still perfectly normal. So she won't pass on her lung cancer to her kids. This is why cancer is so rarely inherited. Since cancer often happens because of a DNA accident in a cell other than an egg or a sperm, it is not passed down
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3 years ago
Drag the labels to the appropriate locations in this concept map.
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7 0
2 years ago
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White raven [17]

Answer:

slightly positive and slightly negative charges of polar covalent molecules, such as water.

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Where does photosynthesis take place in the leaf?
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Answer:

in the chloroplast

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