Answer:
The material effects the speed if sound.
Explanation:
A denser material whose atoms are tightly packed will quickly transfer energy as they are close to each other than mediums like air.
The collision of the two waves would bring force and that would make the new wave smaller
I.i = j.j = 1
i.j = j.i = 0
(-2i - 5j)(i -4j)
= (-2i).i + (-2i).(-4j) + (-5j).i + (-5j).(-4j)
= -2 + 0 + 0 + 20 = 18
If magnification is less than one it means the image is the same exact size as the object.
It’s used in measuring distance from earth with other celestial object. Hope this helps mark brainest
