The one that will change the velocity of a periodic wave is :
B. Changing the medium of the wave
Waves is always determined by the properties of the medium, which means that changing the medium will change the velocity of the wave
hope this helps
<span>LOCATION Z, because it is only 2 away from the coast.
The rest are farther inland
hope this helps</span>
Answer:
The amount of work done in order to lift the box is 
Explanation:
Given the weight of each box is 
And the man lifts boxes at a height of 
We need to find the amount of work done.
The amount of work done is the product of applied force
that causes the displacement
.
In our problem force is
and displacement is
.
Now, work done

So, the amount of work done in order to lift the box is 
The answer that best suits this should be D