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President Roosevelt's travelled there because of his illness.
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Answer:
because they make or produce their own food.
<span>At some point in their lives all chordates have a flexible supporting rod in their backs called a </span>notochord.
Ethnic groups from outside disrupted the inner structure of these nations. This caused them to fall.
Resonance is the phenomenon responsible for the intense vibrations that can arise if a group of soldiers simultaneously step on a bridge.
<h3 /><h3>What is vibration resonance?</h3>
It is the natural frequencies due to external forces that can generate an amplified response, which can result in negative damage, as in the example, damage to the bridge structure.
Therefore, vibration resonance is the effect of exposing a product to a significant external force.
Find out more about resonance here:
brainly.com/question/15337338
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