Answer: External forces are forces caused by external agent outside of the system. Internal forces are forces exchanged by the objects in the system. To determine what part should be considered external and internal, mechanical system should be clearly defined.
Explanation:
Answer:
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Explanation:
The Grand Canyon contains some of the oldest exposed rock on Earth. The mile-high walls reveal a cross section of Earth's crust going back nearly two billion years. These rock layers have given geologists the opportunity to study evolution through time
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People of European descent<span>
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That's because they wanted peace. It was the policy of appeasement. If they gave him what he wanted, that would solve his problems and keep the peace in Europe intact. They were however as it was only a matter of time before the war began, and it did with the invasion of Poland.
The NAFTA is going to increase the pollution. This will lower the U.S. environmental standards. This will also cause a huge amount of pollution in Mexico.
