Write an essay differentiating between closed and open systems. Give an example of an open system from the physical Earth
What will be an ideal response?
Answer: A closed system is one imparted with mass and energy, and neither the mass nor the energy ever leaves the system. In an open system mass and energy enters and leaves, but with work being done within the system. An example would be a local group of plants and animals working together as an ecosystem. Solar energy and solar energy are inputs. The plants and animals are able to live from these inputs, and mass and energy leave the system through metabolic heat loss, and so on.
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The toxic gas hydrogen cyanide has the formula HCN. How many nonbonding electrons must be shown in the Lewis structure of hydrogen cyanide?
A) 2 B) 6 C) 10 D) 12
In trade, India is dominated by its former colonial overseer, Britain
Indicate whether the statement is true or false
Windward means facing the wind and leeward means away from the wind
Indicate whether the statement is true or false
Chicago, IL recorded the following temperatures in one day: High temperature: 40 °F Low temperature: 32 °F What is the daily mean temperature?
A) 72 °F B) 38 °F C) 36 °F D) 8 °F E) The daily mean temperature cannot be determined with the data provided