The only mass that has only geometric boundaries is Antarctica.
Answer:
It reduces strength.
Explanation:
It not desirable to produce concrete mixtures of a higher consistency than normal because the strength of the concrete decreases. Consistency plays an important role in the determination of strength of concrete. Less water than normal quantity in concrete increases the consistency but decreases strength due to incomplete chemical reaction while on the other hand, adding more water would increase water-cement ratio and reduces consistency as well as strength of the concrete so that's why necessary amount of water and cement should be added to get higher strength.
A cognitive psychologist conducts a study to examine differences in cognitive functioning across stages of adulthood. He opts to study one group of young adults ages 21-28. one group of middle-aged adults aged 41-48, and one group of older adults ages 61-
68- The psychologist finding that that the middle age group outperforms the older group is a valid criticism to the study's conclusion
Explanation:
A cognitive psychologist concludes that age relates to cognitive performance on these tasks.This statement means that as a person age's its ability to perform the cognitive task declines .In the study conducted between the various age group the cognitive psychologist where able to find that the people in their middle age (i.e. between 41-48) were able to perform the cognitive task is a better way than the people in the older group. and the younger group was able to perform the cognitive task much better than the middle and the old age group.
Now their is no need for the comparison of the middle age and the old age people for performing the task because as er the conclusion the cognitive skills decline with the age.
So,the psychologist finding that that the middle age group outperforms the older group is a valid criticism to the study's conclusion
Not unless that proctoring testing is part of professors syllabus
The threat of failure for my future
