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Trophic Level, Diet Energy, Group IIA, Chemical Bonds & More

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Describe the movement of electrons required to develop electrical current.

Think about your energy intake today. Pick one food and identify the chain of energy that led to it. What trophic level do you eat from most? Where will the energy that you ingest eventually wind up?

Why do people mistake what is in diet energy drinks for actual energy?

If you went into a disaster shelter, could you get cell phone service inside? What kinds of electromagnetic radiation could this shelter protect you from? For example, does light pass through the shelter, get absorbed by the shelter, is it reflected by the shelter or does light interact with the shelter in a variety of ways?
Research and report on the following properties of all elements on the periodic table in Group IIA: physical properties of each element (color, texture, mass) and chemical properties of the elements (density, crystal shape, etc.).

List and give an example of an object around you for of each of the different types of chemical bonds

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Solution Summary

This solution provides detailed answer to assorted questions related to inorganic chemistry, ecology and physics. The answers are logical, comprehensive and easy to follow.

Solution provided by:
Tania Dey, PhD
Education
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  • MSc,
  • PhD,
Recent Feedback
  • "Thankyou for the feedback. I have a few question though; With the first statistic about cost below... “According to Sigma-Aldrich catalog, cost of 1L octane is AUD $ 392.00, whereas the cost of 1L ethanol is AUD $196.00. Moreover, if ethanol is obtained from sugar industry as a by-product, it may cost even less. Source of oxygen is ambient atmosphere, so it costs nothing. So ethanol is much cheaper than petrol, in fact it is half-priced: AUD $ (392-196) = $ 196.” I didn't think it made sense because the cost of petrol per litre is normally a dollar something or even less than a dollar not a couple of hundred of dollars. For example, a statistic that I found in america was: "U.S. ethanol production costs are about $1.20 per gallon of ethanol, or $1.82 per gallon on a gasoline-equivalent basis." However, I was wondering whether you could find an Australian statistic. Also, you mentioned that H20 is not a greenhouse gas. However, in the combustion equations it is actually carbon dioxide and water vapour which are produced and they are both greenhouse gases. Finally, how do I calculate the energy efficiency of ethanol and petrol? "
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  • "Didnt really answer my questions but gave me a start at least."
  • "Once again this is tremendous help I can't thank you enough for not only working the problem but explaining in detail how and why!! KR"
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    Thus, each subsequent trophic level will consume less energy than the previous trophic level, since the previous trophic level has already absorbed some of the existing energy.

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    The primary producers are always at the first step since they are the main sources of energy. Each level from the producers to the next group of organisms feeding on them represents a trophic level. 2.

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