the answer is c because it is the 3rd step in the scientific analysis steps
 
        
                    
             
        
        
        
Let's see: frequency of cellular phone waves (GSM phones) is (800-1900 MHz). If we look at the table of the electromagnetic spectrum, we can see that this range is contained within the frequencies of the microwaves, which include waves in the range 300 MHz-300 GHz.
So, summarizing, the correct answer is "microwaves".
        
                    
             
        
        
        
Answer: Look where the points are.
Explanation:
 
        
                    
             
        
        
        
Kinetic energy has nothing to do with anything other than motion of the particle. 
When a particle with velocity v collides another particle(suppose it is at rest for simplication), assuming that there is perfectly elastic collision between them, the velocity of particle which was at rest becomes mv/M ( assuming mass of particle in motion to be m and at rest to be M) from convervation of linear momentum. And all this transfer of energy happens in a fraction of seconds which is not visible to naked eyes. 
Hence 1st option is correct!
        
             
        
        
        
Answer:
the answer is d
Explanation:
you get exhausted at the middle because it is steep.