What is the main cause of erosion

Answers

Answer 1

Answer: Erosion is mainly caused by water, wind, and gravity.

Answer 2

Answer:

Erosion is caused by human activities like excessive construction, agriculture, surface mining and forestry. Removing the vegetative cover accelerates erosion, which is often caused by grazing, logging or cultivating. In some cases, it can be removed by pests like pigs, rabbits and goats.

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What acceleration does a 9 N force produce in a 3 kg object? Make sure to show your work. (The 4 steps)

Answers

Answer: 3m/s^2

Explanation:

Given that:

Acceleration of object = ?

Force = 9 N

Mass of object = 3 kg

Since force is the product of the mass of an object and the acceleration by which it moves i.e Force = mass x acceleration

9N = 3kg x acceleration

Acceleration = 9N/3kg

Acceleration = 3m/s^2 (3 metres per second square)

Thus, an acceleration of 3m/s^2 is produced.

Who knows the egg drop challenge

Answers

I know. If you're asking for ideas, I once did one and it did not break. I just took a cardboard box, filled it with thins like packing peanuts, crumpled newspaper, and put the egg inside a few layers of socks in the middle, and taped the box tightly shut. Our science teacher dropped from the roof of the school, and there wasn't even a crack on mine!

A soccer ball is kicked horizontally off a bridge with a height of 36 m. The ball travels 25 m horizontally before it hits the pavement below. What was the soccer ball’s speed when it was first kicked

Answers

Answer:

9.23 m/s

Explanation:

Let, the initial velocity be ux.

The horizontal velocity remans the same. So, time required, t = 25/ux

For vertical component, we know,

h = uy*t + (1/2)*g*t^2 [ g is positive because ball is falling downward ]

Putting in the values, we get,

36 = 0*(25/ux) + 1/2 * 9.81 * (25/u)^2

36 = 3065.625/u^2

u^2 = 85.15625

u = 9.23

[ If there's a problem with the solution, please inform me ]

What is one way humans can help a prairie ecosystem after a wildfire? A. bring water to the plants in the ecosystem B. remove seeds from the ecosystem C. spray DDT over the ecoystem D. build roads through the ecoystem

Answers

Answer:

Explanation:

Answer:

(A) Bring water to the plants in the ecosystem.

(please show work)A rock is dropped off of a cliff. It falls to the ground in 10 seconds. Answer the following questions assuming that there is no air resistance.

c. What is the instantaneous velocity of the rock just before it hit the ground?

d.Find the rock's displacement for the 10 seconds.

Answers

c. -98 m/s

The motion of the rock is a uniformly accelerated motion (free fall) with constant acceleration $g=-9.8 m/s^2$ (negative since it is downward). Therefore, we can find its velocity using the following suvat equation