Skinner's theory of operant conditioning was developed as a result of his discovery of the law of effect influence.
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It meant that Northerners in free states were obligated, regardless of their feelings towards slavery, to turn escaped slaves who had made it North back over to their Southern masters.
Answer:
1798
Explanation:
in 1798 the state legislature banned the direct importation of Africans.
It was believed that even numbers are unlucky.
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Explanation: </u>
It is an old superstitious belief that even numbers are unlucky. In respect of the same superstition, a gun salute is set off odd numbers.
It is a gesture of bestowing great honor on a significant individual. Since long back in history, symbolism has been denoted to every numerical known. Hence, firing a gun for a certain of an odd number of times symbolizes varied kinds of respect in every country.
Some countries fire shots 21 times because number seven is sacred and lucky. Hence 
Answer:
Etnocentrismo se refiere a la manera de la que una persona o un grupo social interpreta la realidad de acuerdo con sus parámetros personales. Etnocentrismo se basa en la creencia que un grupo determinado es más importante o superior que otros grupos, debido a los aspectos de su cultura, tradición, etc. Los miembros de estos grupos sociales describen su cultura, tradición, creencias y costumbres como superiores con respecto a otras razas, sociedades o grupos.
También se puede referir a otras razas, religiones o lenguas, donde un grupo social se describe como superior en comparación con los miembros de otro grupo.
