Answer:
D. Wavelength
Explanation:
An infrared (IR) and ultraviolet (UV) wave propagating through a vacuum must have the same wavelength.
 
        
             
        
        
        
I believe another name for lower point is Ice point
        
                    
             
        
        
        
Answer: 
Work done.
Explanation: 
The skater who lifts has to overcome the partner's weight. When lifted up by 1 meter, her potential energy increases by (mass)x(gravitational acceleration)x(1meter), which is the amount of work done. 
(This all assumes lifting vertically and no other forces being part of the picture) 
 
        
             
        
        
        
Answer:
They will both hit the ground at the same time
Explanation: