Answer: longitudinal
Explanation:
Their vibrations or oscillations are changes in electrical and magnetic fields at right angles to the direction of wave travel.
Answer:
The central idea is the central, unifying element of the story, which ties together all of the other elements of fiction used by the author to tell the story. The central idea can be best described as the dominant impression or the universal, generic truth found in the story.
Yes it is. When he first receive the position as the president of the united states, many people doubt his capabilities as a leader. But he prove himself of having visions that way ahead of his time and not afraid of taking risk by making decision such as emancipation proclamation and granting freedoms for all slaves, which convey his authority as a president
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