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katovenus [111]
4 years ago
7

Which of the following methods of soil conservation uses the roots of plants as anchors in the soil? (2 points) Adding fertilize

rs to soil Planting trees on sloped surfaces Adding beneficial organisms to soil Watering grasses to add moisture
Physics
2 answers:
julsineya [31]4 years ago
8 0
I believe the correct answer is the second option. Planting of trees on sloped surfaces is a method of conservation that utilizes the roots of plants. Planting trees on such areas would prevent hazards and maintain the soil formation future since the roots would hold the soil together preventing or minimizing any soil erosion.
romanna [79]4 years ago
8 0
Planting trees on sloped surfaces.
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An object slides on a level surface in the +x direction. It slows and comes to a stop with a constant acceleration of -2.45 m/s2
Stolb23 [73]

Answer:

uk = 0.25

Explanation:

Given:-

- An object comes to stop with acceleration, a = -2.45 m/s^2

Find:-

What is the coefficient of kinetic friction between the object and the floor?

Solution:-

- Assuming the object has mass (m) that slides over a rough surface with coefficient of kinetic friction (uk). There is only Frictional force (Ff) acting in the horizontal axis on the object opposing the motion (-x direction).

- We will apply equilibrium equation on the object in vertical direction.

                               N - m*g = 0

                               N = m*g

Where,  N : Contact force exerted by the surface on the floor

             g : Gravitational acceleration constant = 9.81 m/s^2

- Now apply Newton's second law of motion in the horizontal ( x-direction ):

                             - Ff = m*a

- The frictional force is related to contact force (N) by the following expression:

                              Ff = uk*N

- Substitute the 1st and 3rd expressions in the 2nd equation:

                             uk*m*g = -m*a

                             uk = a / g

- Plug in the values and solve for uk:

                             uk = - (-2.45) / 9.81

                             uk = 0.25        

8 0
3 years ago
Which of the following best explains work?
Anna71 [15]

Answer:

<h2>Which of the following best explains work?</h2>

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<em>hope</em><em> </em><em>this</em><em> </em><em>helps</em><em> </em><em>u</em><em>.</em><em>.</em>

5 0
2 years ago
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If the ball is stationary just before it is hit and goes 5.40 m high, what impulse did she impart to it?
weeeeeb [17]

Energy is conserved. If the ball reaches a height of 5.50 m, it has gained a certain amount of gravitational potential energy. That energy had to come from somewhere. From this fact, you can deduce the speed of the ball at the end of the impact with the racket.

<h3>What is gravitational potential energy?</h3>

Gravitational energy or gravitational potential energy is the potential energy a huge item has corresponding to one more monstrous article because of gravity. It is the potential energy related with the gravitational field, which is delivered (changed over into active energy) when the articles fall towards one another. Gravitational potential energy increments when two articles are brought further apart. It is the potential energy related with the gravitational field, which is delivered (changed over into dynamic energy) when the items fall towards one another. Gravitational potential energy increments when two items are brought further separated.

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wariber [46]

Answer:

D

Explanation:

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8 0
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