Answer:
Transatlantic slave trade, segment of the global slave trade that transported between 10 million and 12 million enslaved Africans across the Atlantic Ocean to the Americas from the 16th to the 19th century. It was the second of three stages of the so-called triangular trade, in which arms, textiles, and wine were shipped from Europe to Africa, slaves from Africa to the Americas, and sugar and coffee from the Americas to Europe.
Explanation:
<span>When a data value is converted to a standardized scale representing the number of standard deviations the data value lies from the mean, we call the new value a <span><u>z-score.</u>
According to its definition, a z-score is "</span></span><span>the number of standard deviations from the mean a data point is."</span>
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.
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