Answer: A- removes fertile topsoil
A wind erosion is a natural phenomena in which the surface and subsurface layers of soil is removed and displaced by the action of wind. It occurs in flat, bare areas, having dry and sandy soil or any place where the soil is loose, dry and fine in texture.
The wind erosion removes the superficial layers of soil that are fertile, hence reduces the soil fertility of soil.
Answer:
38.6 %
Explanation:
First of all, we have to calculate the final velocity of the block-bullet system. We can apply the law of conservation of momentum:
where
m = 0.15 kg is the mass of the bullet
u is the initial velocity of the bullet
M = 2.44 kg is the mass of the block
U = 0 is the initial velocity of the block (it is at rest)
v is the final velocity of the bullet+block
Solving for v,
The total initial kinetic energy of the system is just the kinetic energy of the bullet:
While the final kinetic energy of the block+bullet is:
So the fraction of kinetic energy lost is
And so, the fraction of kinetic energy left in the projectile after he flies off the block is
1 - 0.614 = 0.386 = 38.6 %
Explanation:
to go fast from to one place to another
Answer:
Its velocity is 0.29 m/s due east.
Explanation:
The bunny rabbit covered a total distance of 6 m eastwards during the motion in 21 seconds.
Velocity is define as the ratio of the displacement (distance moved in a specified direction) to the time taken.
velocity =
It is a vector quantity, and measured in meters per seconds.
From the given question, displacement = 6 m due east and time = 21 seconds. So that;
velocity =
= 0.2857
The velocity of the rabbit is approximately 0.29 m/s due east.
We have that with v_1 =v this goes to show that the velocity of the bigger block after the collision takes place is v
From the question we are told
Suppose the blocks collide elastically. picking the positive direction to the right, what is the velocity of the bigger block after the collision takes place?
Generally the equation for Momentum is mathematically given as
P=mv
Therefore
Hence
Therefore
Hence
Now
with v_1 =v this goes to show that the velocity of the bigger block after the collision takes place is v
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