Radio waves are used in cell phone wireless communication by this: Radio waves are released from the cell phone and travel to satellites in the stratosphere. After they reach the satellite, they are redirected to the recipient of the call/text.
Hope this helps! Can I have brainliest please?
 
        
             
        
        
        
Answer:
density of cube =11.605 g/cm³
Explanation:
density of a substance is the mass per unit volume of that substance.
the density of a substance = 
volume of a cube = l³,
l = 19.0mm , lets convert mm to cm
1mm = 0.1cm, thus, 19mm =19*0.1 =1.9cm
length of cube =1.9cm
volume of cube = 1.9³
density of cube = 
density of cube =11.605 g/cm³
 
        
             
        
        
        
Answer:
Because winding roads have a gentle slope on hills, so it's easy to climb it than a steepy.
 
        
             
        
        
        
D.
All follow an elliptical path that has two foci, rather than a circular path.
Kepler found paths are elliptical, not circular