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mr_godi [17]
2 years ago
9

Calculate the magnification of an object with length 4cm , if the length of the drawing is 40cm

Biology
1 answer:
IceJOKER [234]2 years ago
6 0

Answer:

-0.33

Explanation:

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Imagine this ethical dilemma of science: a small number of laboratory-bred animals must suffer or be killed in order to test a n
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<span>This is an example of a moral dilemma. A moral dilemma is a situation where you are asked to choose between two different situations in which moral reasoning is required in your decision making. Here, the moral reasoning comes down to killing animals for the benefit of human life.</span>
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Two insecticides will be compared for their effectiveness in eliminating aphids on tomato plants. Forty tomato plants of the Big
densk [106]

Answer:

The t-test

Explanation:

<em>The researcher should use a t-test to compare the two means and check if they are significantly different from each other.</em>

In using the t-test, both null (H0) and alternate (H1) hypothesis are made such that:

  • H0: n1 = n2
  • H1: n1≠ n2

Thereafter, the value of t is calculated and compared to its critical value on the table. The formula for calculating the t goes thus:

t = \frac{Y_1 - Y_2}{\sqrt{\frac{S_1}{n_1} + \frac{S_2}{n_2}  } }

where, Y1 = mean of population 1, Y2 = mean of population 2, S1 = variance of population 1, S2 = variance of population 2, n1 = number of individuals in population 1 and s2 = number of individuals in population 2.

<em>At the end of the day, if the calculated t value is more than the critical value of t, the H0 is rejected and it shows that the two means are significantly different. Otherwise, the H0 is accepted and this shows that there is not significant difference between the mean of population 1 and that of 2.</em>

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3 years ago
What part of the respiratory system is composed of a single layer of epithelial tissues surrounded by a network of capillaries?
svetlana [45]
I think the correct answer from the choices listed above is option A. It is the alveoli that is composed of single layer <span>surrounded by a network of capillaries. These are used to allow oxygen and carbon dioxide to move from the lungs to the bloodstream.</span>
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In which Colorado Rockies scenario was there more erosion? Why was there more erosion in the scenario?
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Answer:

There was more erosion in the Colorado Rockies scenario where there was steady rain compared to the scenario in the same area where there was only a drizzle. There is more erosion because the steady rain increased the volume of the river more than the drizzle did. Because there was more water added to the river, the river flowed faster. The faster a river flows, the more sediments it transports or erodes.

Explanation:

hope this helps<3

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2 years ago
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how does distance from the ocean, ocean current, latitude, elevation, and relative location of mountain ranges affect the climat
7nadin3 [17]

Answer:

So many factors influence the climate. Some of them are ocean currents, latitude, distance from the ocean, elevation, etc.

Explanation:

The distance from the ocean influences the climate of the place. If the place is located on the coast, the climate will be colder and humidity will be higher.

Thanks to ocean currents the temperature can be changed. Ocean currents can low the temperature but also make it very high.

Latitude has an influence also regarding the temperature. Elevation, as it gets higher, the air above is falling, so the pressure decreases.

Regarding all the factors above, we can say that New York has hot summers, with high humidity and very cold winters, full of snow. Close to the river, the ground is muddy and going to the mountains, the ground is getting rocky

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