The answer is A. <span>effective length of the tube
In wind instrument, the effective length is not the actual length of the instrument but only the length that the finger holes manage to cover.
The more holes it managed to cover, the higher frequency of vibration it might able to produce, which lead to higher pitch of the instrument.</span>
Answer:
the branch of biology that deals with phylogenesis
Explanation:
another term for phylogenesis
Answer:
The object's velocity is increasing
Explanation:
From the graph above, we can deduce that the velocity is increasing. From the first stage, v=m/s=0.
At the third stage, v=20/2= 10m/s.
At the 5th stage, v=80/4=20m/s.
This shows velocity is increasing.
D, this competition effects death rates, birth rates hence effecting growth rates, in A less dense area competition would be low increasing birth rates and growth rates while decreasing death
