Answer:
 taking some 20 to 30 seconds to do so, depending on the exact temperature.
 
        
                    
             
        
        
        
Answer:
degree of freedom is 2
Explanation:
We have here,
Physical activity classified as "positive attitude" or "negative attitude"
General activity level was classified as active, mildly active, and inactive.
Degree of freedom (Row-1)(Column -1) = (2-1)(3-1)=2
Therefore degree of freedom is 2
 
        
             
        
        
        
Answer:
La ayuda múltiple puede variar significa que recibe ayuda de cualquier persona o fuente.
Explanation:
 
        
             
        
        
        
The united states was heavily influenced by the Great migration. One of the significant characteristic is the number of African Americans moved to states in the Northern America. Thus the correct option is (C).
<h3>
What is Great Migration?</h3>
Great migration refers to the mass movement of the African American from the South America to the North America in the year between 1910 to 1970. around 6 million people were dislocated from there old region to the new region. Thus it  is also known as Black Migration.
US was heavily influenced by the situation as it took place at the time of the great depression. The causes that led to the great migration are racial segregation, exploitation, to obtain freedom, poor economic conditions, search of job etc.
Thus the main characteristic of great migration is movement of the African Americans to the state of North America.
 Thus the correct option is (C).
Learn more about  Great Migration here;
brainly.com/question/14178058
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