What can state governments not do?

What can state governments not do? Powers Reserved for the Federal Government Article I, Section 10 of the Constitution of the United States puts limits on the powers of the states. States cannot form alliances with foreign governments, declare war, coin money, or impose duties on imports or exports. Which amendments prohibited certain practices by […]

How is earthquake measured?

How is earthquake measured? Earthquakes are recorded by a seismographic network. Each seismic station in the network measures the movement of the ground at that site. The Richter scale measures the largest wiggle (amplitude) on the recording, but other magnitude scales measure different parts of the earthquake. How earthquake are detected and observed? Earthquakes are […]

Why is tourism important to the economy?

Why is tourism important to the economy? The Importance of Tourism on Economies and Businesses Tourism boosts the revenue of the economy, creates thousands of jobs, develops the infrastructures of a country, and plants a sense of cultural exchange between foreigners and citizens. The number of jobs created by tourism in many different areas is […]

Is the momentum of a system always conserved?

Is the momentum of a system always conserved? In collisions between two isolated objects Newton’s third law implies that momentum is always conserved. Thus the total momentum of the system just before the collision is the same as the total momentum just after the collision. Is momentum ever not conserved? Momentum is not conserved if […]

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