In contrast to mechanical waves, electromagnetic waves can travel without a medium. This implies that electromagnetic waves can pass not only through solid objects like air and rock but also through empty space.
James Clerk Maxwell, a Scottish scientist, created a scientific theory to explain electromagnetic waves in the 1860s and 1870s. He realized that electromagnetic waves can be created when magnetic and electrical fields combine together. He compiled this electricity-magnetism relationship into what are now known as "Maxwell's Equations."
German physicist Heinrich Hertz used Maxwell's theories to explain how radio waves are transmitted and received. In honour of Heinrich Hertz, the hertz, or one cycle per second, is the unit of radio wave frequency. Two issues were resolved by his radio wave experiment. First, he had proven that the speed of radio waves was the same as the speed of light, which was something Maxwell had only theorized.
This demonstrated how radio waves are a type of light. Second, Hertz discovered how to create electromagnetic waves by causing the electric and magnetic fields to separate from wires.
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The correct answer is: <em>"It condemned military aggression and outlawed war."</em>
The Kellogg-Briand Pact was an international agreement sponsored by the countries of France and the United States in 1928. Signatory states promised to resolve disputes and conflicts of whatever nature or origin they may be that, which could rise among them. The countries to failed to live up to this promise would be denied the benefits of this treaty.
The initial signing countries were the United States, France, and Germany, with more countries following suit afterward.
Andrew jackson was a major general in the war of 1812
74 years old!!!!!!!!!!!!!!)
The French were trying to take Santo Domingo but there was a great black general there named Toussaint L’Ouverture which was preventing him. On top of that the French soldiers were fighting Yellow fever which was lowering the French army numbers. Therefore Napoleon had to do the Louisiana purchase and sell it for only 15 million to supply more soldiers.
