Answer:
1: France, England, Russia, and the U.S.
2: Germany, Austria-Hungary, and the Ottoman Empire
3: Where the counties entered combat
Other #3: Britain and France against Germany
4:Germany against Russia
5: Italy and France against Germany and Austria-Hungary
6: the US fought in the western front because they could get to France on ships easily since air travel wasn't a thing yet
Explanation:
Info in the paragraph above questions
Answer:
Statement that is true about electromagnetic and mechanical waves is:
Option B: Mechanical waves must travel through a medium, but electromagnetic waves do not require a medium to travel.
Explanation:
'Electromagnetic' waves do not need any medium to travel whereas 'mechanical waves' need a medium or matter for transmission. Electromagnetic waves are produced by the 'vibrations' of the charged particles. They can even travel in vacuum.
On the contrary, mechanical waves are caused by the 'wave amplitude'. Mechanical wave can travel in solid, liquid and gas and are considered to be periodic disturbance.
Thus, Option B is the most statement apt explaining the difference between electromagnetic and mechanical waves.
Answer:
opportunity cost
Explanation:
opportunity cost is a concept in economics used to describe opportunity lost or alternative use of resources forgone as a result of allocation of resources to alternatives. In the example above holly gives up the interest that could have been earned from her investment and allocates the money resource to another alternative-book. Her opportunity cost here is the investment value as a result of the interest that would have accrued to her.
The idea of it was that the United States was created by God to span across America "From Sea to Shinning Sea". This belief did lead into the Mexican-American War where the U.S. got it's wish of Manifest Destiny
