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4 years ago

Which factors improve soil fertility? Select the three correct answers.

Physics

3 answers:

horrorfan [7]4 years ago

7 0

B. Bacteria
C.Earthworms
D. Humus
@CristianoRonaldo

nirvana33 [79]4 years ago

7 0

Answer: The correct answer is- B) bacteria, C) Earthworm, and D) Humus.

Out of the given options, bacteria, Earthworms, and Humus helps in improving the fertility of soil.

Bacteria and Earthworms can decompose the organic matter and convert it into usable form for plant's growth. They also help in enhancing the amount of air and water in the soil so that it can be efficiently utilized by plants. Humus is an organic material that is dark in color and rich in nutrients as it is obtained by the decay of plant and animal matter. It helps in sustaining moisture in the soil and by providing nutrients, it makes the soil fertile.

Thus, B), C), and D) is the right answer.

Snowcat [4.5K]4 years ago

3 0

Answer: The correct answer is- B) bacteria, C) Earthworm, and D) Humus.

Out of the given options, bacteria, Earthworms, and Humus helps in improving the fertility of soil.

Bacteria and Earthworms can decompose the organic matter and convert it into usable form for plant's growth. They also help in enhancing the amount of air and water in the soil so that it can be efficiently utilized by plants.

Humus is an organic material that is dark in color and rich in nutrients as it is obtained by the decay of plant and animal matter. It helps in sustaining moisture in the soil and by providing nutrients, it makes the soil fertile.

Thus, B), C), and D) is the right answer.

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Answer:

Tension in string equals 14.715 Newtons

Explanation:

The situation is represented in the figure attached below:

For equilibrium of the clothes along y- axis we have

$\sum F_{v}=0\\\\\Rightarrow 2Tcos(\theta )=W\\\\\therefore T=\frac{W}{2cos(\theta )}$

Applying values we get

$\sum F_{v}=0\\\\\Rightarrow 2Tcos(\theta )=W\\\\\therefore T=\frac{3\times 9.81}{2\times 1}=14.715N(\because cos(\theta )=\frac{3}{3}=1)$

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3 years ago

Read 2 more answers

A sled starts from rest at the top of a hill and slides down with a constant acceleration. At some later time it is 14.4 m from

Alenkasestr [34]

Answer:

V₁ = 5.6 m/s

V₂ = 7.2 m/s

V₃ = 8.8 m/s

Explanation:

Average velocity: Average velocity can be defined as the ratio of the total displacement to the total time taken. The S.I unit of Average velocity is m/s.

For the first 2 s,

V₁ = Δd₁/t

Where V₁ = Average velocity for the first 2 s

Where Δd₁= distance, t = time

Δd₁ = 25.6-14.4 = 11.2 m t = 2 s

V₁ = 11.2/2

V₁ = 5.6 m/s

For the second 2 s,

V₂ =Δd₂/t

Where V₂ = average velocity for the second 2 s.

Δd₂= 40-25.6 = 14.4 m, t= 2 s

V₂ = 14.4/2

V₂ = 7.2 m/s

For the last 2 seconds,

V₃ =Δd₃/t

Where V₃ = average velocity for the last 2 s

where Δd₃ = 57.6- 40 = 17.6 m, t = 2 s

V₃ = 17.6/2

V₃ = 8.8 m/s.

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4 years ago

I’ll give points plz and brainliest I know the result I just need the process.

shusha [124]

Shiddd ion even know but can you like my comment?

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3 years ago

You expend 1000 w of power moving a piano 10 meters in 5 seconds. how much force do you exert

Vinvika [58]

Answer:

Force, F = 500 N

Explanation:

Given that,

Power expanded, P = 1000 W

Distance moved by piano, d = 10 m

Time taken, t = 5 s

To find,

The force exerted by the person

Solution,

The rate at which the work is being done is called power delivered. Its formula is given by:

$P=\dfrac{W}{t}$

W is the work done, W = F × d

$P=\dfrac{Fd}{t}$

On rearranging the above formula to find F as :

$F=\dfrac{P t}{d}$

$F=\dfrac{1000\times 5}{10}$

F = 500 N

Therefore, the force exerted on the person is 500 N. Hence, this is the required solution.

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3 years ago

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Answer:

F is non-conservative.

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3 years ago