Rock dug out from the deep inside earth and refined.
Explanation:
Ores are usually rocks dug out from deep within the earth and refined.
An ore is an aggregate of metalliferous minerals with gangue that can be won at profit under current economic conditions.
Ores are rocks and rocks can be ores if they contain viable economic minerals.
They are usually naturally formed and they contain different minerals.
For example cassiterite is a known ore of tin.
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Assuming our "closed tube" is closed at only one end, then
<span> v = fλ = f*4L/n
</span><span> where "n" is the harmonic number. So
</span><span> L = nv / 4f = n*346m/s / 4*256Hz = n*0.38 m
</span> <span>Since the only option in your list that is an integer multiple of 0.38 m is 1.35 m
</span><span> I'd say that we're hearing the fourth harmonic.
answer is
</span><span>A. 1.35 m</span><span>
</span>
Answer:
from Late Latin convectionem
Explanation:
Attenuation is the correct answer.
