Why people won’t want to live near wind turbines.
2 answers:
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Momentum equals mass times velocity, which, in this case, is 
.
The displacement of the object from 2 seconds to 6 seconds will be 8 m.
<h3>What is displacement?</h3>
The distance through which the body is displaced when an external force is act on it.it is a vector quantity .its unit is m.
From the graph, it is observed that from 2 seconds to 6 seconds the change in the velocity from 4 m/sec to 8 m/sec
The area of the region 2 seconds to 6 seconds shows the displacement.The displacement of the object is;
Hence, the displacement of the object from 2 seconds to 6 seconds will be 8 m.
To learn more about the displacement refer to the link;
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Answer:
The person should use a convex lens of power -0.625 D.
Explanation:
Given that, the far point of the person, with myopic eye, is 160 cm.
It means that the image of an object, which is at infinity, is formed at this point 160 cm distance away from the person's eye.
If the object is infinity, then the object distance, u = -.
Image distance, v = -160 cm.
u and v are taken to be negative because the object and the image of the object are on the side of the eye from where the light is coming.
Let the focal length of the lens which is to be used for the correction of this myopic eye be f, then using lens equation,
The negative focal length indicates that the lens should be convex.
The power of the lens is given by
So, the person should use a convex lens of power -0.625 D.