Answer:
Doppler Effect
Explanation:
Doppler Effect is a term in Physics that describes the phenomenon experienced when there is change in wave frequency during the relative motion between a wave source and its observer.
In other words, it is referred to as increase or decrease in the level of sound, or other waves as the distance between source and observer is closer or farther from each other, such that it causes change in pitch, which is noticeable by the observer.
For example, when a sound object moves towards an individual or observer, the frequency of the sound waves increases, leading to a higher pitch, and at the same time, when the sound object moves away from an individual or observer, the frequency of the sound waves decreases, leading to a lower pitch. E.g passing siren from ambulance.
Hence, in this case, the right answer is DOPPLER EFFECT
During the middle of the twentieth century, congress became the most deferential to the white house.
The United States Congress comprises most of the legislative branch. The role of this entity is to represent the citizens and create the laws. Moreover, Congress is divided into:
- The house of representatives
- The Senate
Throughout history, the United States Congress was one of the most powerful entities in government, this is because during important events such as the independence, the gilded era, the Great depression, etc. the congress had a great influence on the laws of the nation.
Later, during the middle of the twentieth century, Congress underwent important changes in its structure. This cause citizens to have more control over the congress and the congress to become a deferential institution, this means congress needed to represent and respect citizens' will.
Learn more in: brainly.com/question/13619505
Answer:
rarely because slaves where allowed to buy there way out. but it still is rare but ti has happened. but if they did not buy their way out then they weren't allowed to be free and they would be slaves for their entire lives.
Explanation:
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They start to make more advanced creations
