Answer:B
Explanation:Grote reber was the first scientist to map the milky way galaxy using radio waves.
 
        
                    
             
        
        
        
Answer:
B. has a smaller frequency 
C. travels at the same speed  
Explanation:
The wording of the question is a bit confusing, it should be short/long for wavelength and low/high for frequency. I assume low wavelength mean short wavelength.
All sound wave travel with the same velocity(343m/s) so wavelength doesn't influence its speed at all. It won't be faster or slower, it will have the same speed.
Velocity is a product of wavelength and frequency. So, a long-wavelength sound wave should have a lower frequency.
The option should be:
A. travels slower -->false
B. has a smaller frequency -->true 
C. travels at the same speed  --->true
D. has a higher frequency  --->false
E. travels faster has the same frequency  --->false
 
        
             
        
        
        
Answer:
sun is the main source while the other object reflect light on the sun
Explanation:
nasa libro yans
 
        
             
        
        
        
The colder the more likely it is to become a liquid
        
                    
             
        
        
        
Answer:
46,800 seconds. I hope this helps