The sun is a clear example of objects releasing radiation in nature
        
             
        
        
        
Homie I don’t know either♀️Drop out of schl ig ;-;
        
             
        
        
        
Compounds are atoms or molecules that are chemically bonded together to form a different molecule or compound. The process could be written as a chemical reaction. A mixture is when two elements or compounds are mixed together but do not react, ie no chemical reaction between the two occurs.
 
        
             
        
        
        
Answer:
11.23%
Explanation:
Lets take 
Speed of man in still water =u= 1.73 m/s
Speed of flow of water = v=0.52 m/s
When swims in downward direction then speed of man = u + v
When swims in upward direction then speed of man = u - v
Lets time taken by man when he swims in downward direction is 
 and when he swims in downward direction is 
 
Lets distance is d and it will be remain constant in both the case
 
 


Time taken in still water 
2 d= t x 1.73
t=1.15 x d sec


total time in current = 0.82 +0.44 d=1.26 d sec
So the percentage time 

  Percentage time =11.32%
So it will take 11.32% more time as compare to still current.
 
        
             
        
        
        
Well when you eat you get energy and then you use it to ride up the hill sorry I don't know how it is classified