In one paragraph, using your own words, explain how Earth's atmosphere is able to protect you against the harmful radiation that
1 answer:
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Explanation :
Angular diameter of a sphere or a circle shows how large a sphere or a circle appears from a given point. It is the angle between the initial and final positions.
The angular diameter of a given sphere or a circle is given by :
where is angular displacement
d is actual diameter of object
D is distance to the center of sphere
So, angular displacement is inversely proportional to the distance from the object.
<em>Hence, as we move away from the object the angular diameter of an object gets smaller.</em>
Answer:
Explanation:
we use the equation for the final speed:
where is the final speed,
is the initial speed,
is the gravitational acceleration (
) and
is the height.
In this case we don't have an initial velocity indicated so: , and we are told that the boulder is at a height:
.
We substitute this values into the equation:
the speed of the object right before it hits the ground is