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devlian [24]
3 years ago
12

Describe how a Newton's cradle illustrates the conservation of energy.

Biology
2 answers:
GarryVolchara [31]3 years ago
6 0

Answer: The correct answer is Option D.

Explanation:

Law of conservation of energy states that energy cannot be created or destroyed, but is transformed from one form of energy to another form. The total energy of the system remains constant.

In the Newton's cradle, there is elastic collision between the balls. The energy at first was potential energy and it was transformed in the form of kinetic energy as the ball swing up.

In elastic collision, the energy and momentum remains conserved.

The energy possessed by the first ball was potential energy due to its position. On collision, the potential energy will be converted into kinetic energy and transferred to the second ball. The energy will be transferred to the rest of the balls in contact one by one till the last ball starts to move and kinetic energy transforms to potential energy again.

This process will continue until and unless stopped by an external unbalanced force. As we know, from the first law of motion an object continues to be in the state of rest or motion unless and until an external unbalanced force is applied on it.

Hence, the correct option is Option D.

yulyashka [42]3 years ago
3 0
D is the correct answer
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Explain how human embryonic stem cells, adult stem cells, and skin cells taken from the same person would be the same and how th
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There would be many differences as well as many similarities between these cells.

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Embryonic cells  are totipotent. They have the capability to divide into every cell of the body.

Adult stem cells are pluripotent. They have the ability of divide into some different types of cells.

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The glucose-making part of photosynthesis take place in what
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Explain why populations tend not to continue to increase exponentially in an environment: 2. Explain what is meant by environmen
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Answer and Explanation

Explain why populations tend not to continue to increase exponentially in an environment: The exponential growth model is based on unlimited resource availability which means that there is no effect depending on density. There is no competition for resources. Natality and mortality rate do not depend on density. There is a constant growth rate per capita and it is proportional to the population size. A population that exhibits exponential growth model increases in proportion to its size. In the Logistic growth model, the population growth depends on density, the natality and mortality rate depends on the population size, which means that there is no independence between population growth and population density.

When a population grows in a limited space, density rises gradually and eventually affects the multiplication rate. The population's per capita growth rate decreases as population size increases. The population reaches a maximum point delimited by available resources, such as food or space. This point is known as the carrying capacity, K.

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Explain what is meant by carrying capacity: The carrying capacity K is the maximum point delimited by available resources, such as food or space.

K is a constant that coincides with the size of the population at the equilibrium point when the natality rate and the mortality rate get qual to each other.

Explain the importance of carrying capacity to the growth and maintenance of population numbers: If the population size, N, is inferior to K (N<K) the population can still grow. When N approximates to K, the population´s growth speed decreases. When N=K, the population reaches equilibrium, and when N is superior to K (N>K) the population must decrease in size because there are not enough resources to maintain that size.  

Explain why a newly introduced consumer (e.g. rabbit) would initially exhibit a period of exponential population growth: The example of the rabbit is a case of invasion. Biologic Invasions refer to new species that disperse and establish in a new area far or out of their original distribution range. Once established, these species expand their distribution from the first invaded spot and overgrows. Once stablished, they expand. In the new area, <em>they have less environmental pressure and better conditions than in their origin area -fewer predators, more resources, better nitches-, and these factors favor their overgrowth and consequently uncontrolled expansion</em>. At this point, the population is exhibiting exponential growth. They have enough food available, they might not have predators, they do not have enough competitors for food or space, and if they do they are adapted to live under harder conditions so they are able to compete. The new species is not suffering from the effects of limiting factors yet.  

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<em>5) Stabilization.</em> They reach an equilibrium point.  

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Answer:

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