Biology

Biology, 24.08.2019 00:00, castellon67

Why are we able to use stream macroinvertebrates to tell us about water quality?

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Biology, 05.07.2019 21:20, tajajohn7597

1.) the headwaters of a stream are always located at a/an elevation than the mouth of the stream. 2.) a stream’s velocity is at the bottom and edges. 3.) a stream’s invisible load represents (on average) about 15% of the mass of material transported. 4.) a stream with many rapids and waterfalls is likely a/an stream. 5.) in a meander, water flowing around the outside of a curve flows than water flowing around the inside of the curve. 6.) an oxbow lake can form near a/an stream. 7.) a/an is likely to form where a stream deposits sediment as it enters another body of water.

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Biology, 24.07.2019 02:50, ggggggggv24

For many years, the evaluation of water quality of north carolina streams was defined in chemical terms, ignoring the biological component. more frequently now, the bioindicator is used to evaluate stream quality. what is the biotic index? a)the bioindicator is a scale based on algae levels, used to measure water quality in streams.b)the bioindicator is a scale based on fungus levels, used to measure water quality in streams.c)the bioindicator is a scale based on coliform bacteria levels, used to measure water quality in streams.d)the bioindicator is a scale based on the tolerance value of macro-invertebrates in an environment, used to measure water quality in streams.

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Chemistry, 24.09.2019 20:00, Evey4851

In a refinery, a stream of water at its bubble point (just about to boil) is used to completely condense a stream of hot gasoline just at its condensation point in a heat exchanger. the gasoline goes into the exchanger at its dew point (quality of 1) and comes out completely condensed, without any subcooling (quality of 0). likewise, the water stream goes into the exchanger and takes the heat from the gasoline stream, and emerges with a quality of 1 (no superheating). the gasoline stream is at 130 °c, while the water stream is at 100 °c. if the total heat duty of the heat exchanger is 12,000 k/minute, then what is the required area (square meters) of the heat exchanger? what is the lmtd value for this problem? what value did you use for temperature difference in this case? sketch the hot and cold side temperature profiles (graph of t vs distance along tubes) of this heat exchanger

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Social Studies, 25.10.2019 03:43, zariahj044

3) a group of students observed and measured various characteristics of a stream for one day. which statement about the stream is most likely an inference? a) the stream water is dark brown. b) the water level of the stream will rise after the next rainfall. c) the velocity of the stream is greatest near the outside of a meander. d) the stream's depth is different at various distances from the streambank.

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