Answer:
process to separate mixtures by removing a liquid layer that is free of a precipitate, or the solids deposited from a solution
Explanation:
Answer:
is more effective if reinforcement for the target behavior is withheld or delivered infrequently
Explanation:
When the reinforcement is delivered frequently, people who misbehaved already make mental preparation to receive it. This will reduce the severity of the reinforcement over time.
If it's delivered infrequently, there will be added pressure from speculation whether the reinforcement will be delivered. This will make them become less likely to misbehave.
Answer:
He argued that swimming or being moved across the vast oceans was physically difficult for most of these species. For him, the existence along the coastal parts of Africa and South America of similar fossil organisms was the most convincing evidence that the two continents were once joined.
Explanation:
Answer:
"Un sutil pensamiento erróneo puede dar lugar a una indagación fructífera que revela verdades de gran valor." -Isaac Asimov
Are you talking about LBJ or Andrew Johnson?
Then no. A Johnson's term was too close to being over. Same thing happened to Clinton.
