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Alinara [238K]
3 years ago
12

Why cardiac cycle is a cycle?

Geography
2 answers:
zhannawk [14.2K]3 years ago
4 0

Answer:

its a b

Explanation:

yKpoI14uk [10]3 years ago
3 0
The cardiac cycle is the performance of the human heart from the ending of one heartbeat to the beginning of the next heartbeat.It consists of two periods: one during which the heart muscle relaxes and refills with blood, called diastole, following a period of robust contraction and pumping of blood, dubbed systole.
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what three types of data are reported by the U.S. Census Bureau regarding the population of each census type?
Softa [21]
1. # of nonwhites
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3 years ago
Compare and contrast the physical and human aspects of both cuba and Mexico in a paragraph
Firlakuza [10]
North America, the third-largest continent<span>, extends from the tiny Aleutian Islands in the northwest to the Isthmus of Panama in the south. </span>

<span>North America’s </span>physical geography<span>, </span>environment<span> and </span>resource<span>s, and </span>human geography<span> can be considered separately.</span>

<span>North America and South America are named after Italian </span>navigator<span>Amerigo Vespucci. Vespucci was the first European to suggest that the Americas were not part of the </span>East Indies<span>, but an entirely separate landmass. The portions of the landmass that widened out north of the </span>Isthmus<span> of Panama became known as North America. oh and if this helped could you give me a brainlest please? Thanks have a nice day.</span>
5 0
3 years ago
Knox County is able to draw fresh water from the Lewis and Clark Lake over and over. Describe the possible interactions of Earth
Naddika [18.5K]

Answer:

Erosion has exposed limestone, shale and sandstone geology of the area in the scenic cliffs along the shore of Lewis and Clark Lake SRA, a reservoir on the Missouri River in Knox and Cedar counties.

Environmental science studies the interactions between the physical, chemical, and biological components of the environment, including their effects on all types of organisms. Earth science (also known as geoscience), is an inclusive term for all sciences related to Earth (geology, meteorology, oceanography, etc). Although environmental and earth science cover essentially the same material, environmental science places greater emphasis on the biological realm, while earth science places greater emphasis on the physical realm.

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The spheres interact to effect Earth’s systems and processes, and they are constantly changing each other.

For example, ocean currents (hydrosphere) affect air temperature (atmosphere): The Gulf Stream is a powerful water current in the Atlantic Ocean. It’s warm water moderates the temperatures on the east coast of the USA.

Another example of how the spheres affect each other is through erosion. Erosion happens in the desert when wind (atmosphere) shapes the sand in the geosphere. Water (hydrosphere) can also shape land, such as in the formation of the Grand Canyon.

Explanation:

Lakes and wetlands also have distinctive biogeochemical characteristics with respect to their interaction with ground water. The chemistry of ground water and the direction and magnitude of exchange with surface water significantly affect the input of dissolved chemicals to lakes and wetlands. In general, if lakes and wetlands have little interaction with streams or with ground water, input of dissolved chemicals is mostly from precipitation; therefore, the input of chemicals is minimal. Lakes and wetlands that have a considerable amount of ground-water inflow generally have large inputs of dissolved chemicals. In cases where the input of dissolved nutrients such as phosphorus and nitrogen exceeds the output, primary production by algae and wetland plants is large. When this large amount of plant material dies, oxygen is used in the process of decomposition. In some cases the loss of oxygen from lake water can be large enough to kill fish and other aquatic organisms.

The magnitude of surface-water inflow and outflow also affects the retention of nutrients in wetlands. If lakes or wetlands have no stream outflow, retention of chemicals is high. The tendency to retain nutrients usually is less in wetlands that are flushed substantially by throughflow of surface water. In general, as surface-water inputs increase, wetlands vary from those that strongly retain nutrients to those that both import and export large amounts of nutrients. Furthermore, wetlands commonly have a significant role in altering the chemical form of dissolved constituents. For example, wetlands that have throughflow of surface water tend to retain the chemically oxidized forms and release the chemically reduced forms of metals and nutrients

7 0
3 years ago
What is one reason why nigerians remain poor, despite their countries large oil deposits?
s344n2d4d5 [400]
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ValentinkaMS [17]

Answer:

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If we were going to get more technical, flow in rivers and streams are measured for their streamflow, which is the amount of water passing through some infinitesmal volume, i.e a point over time. The velocity of the water is determined using acoustic/Doppler based instruments, which will give the local direction of the flow of the river at the measured point along with the velocity.

Hope the answer helps!

8 0
3 years ago
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