Explanation:
Contamination can have undesirable consequences in real experiments, some of them are related to the feelings that may arise in the research participants, the contamination bias reduces the differences between the research groups, and can cause a comparison between the treatments of each different group, the which can generate conflicts and rivalries on the part of groups that consider themselves to be inferior to others. These contamination-related problems can significantly interfere with the research results.
Answer: Ocean currents act as conveyor belts of warm and cold water, sending heat toward the polar regions and helping tropical areas cool off, thus influencing both weather and climate. ... Land areas also absorb some sunlight, and the atmosphere helps to retain heat that would otherwise quickly radiate into space after sunset.
<span>The factor of ideas was the big part of driving social change, according to Weber. Having ideas that forwarded society and having the wherewithal to put those ideas into action was the big reason why some people were able to get ahead in life and others struggled to make ends meet.</span>
Well its <span>a dark area or shape produced by a body coming between rays of light and a surface.</span>
