Explanation:
Wavelength = speed of light/frequency
 Answer is 

 
        
             
        
        
        
Answer:
Initial velocity, U = 4.5m/s
Explanation:
Given the following data;
Final velocity, v = 12m/s
Time, t = 5 seconds 
Acceleration, a = 1.5m/s²
To find the initial velocity, we would use the first equation of motion. 
 
 
Where;
V is the final velocity. 
U is the initial velocity. 
a is the acceleration. 
t is the time measured in seconds. 
Substituting into the equation, we have;
12 = U + 1.5*5
12 = U + 7.5
U = 12 - 7.5
Initial velocity, U = 4.5m/s
 
        
             
        
        
        
Answer:
Answer is 
A. I = 6.3×10^8 A
B. Yes
C. No
Refer below.
Explanation:
Refer to the picture for brief explanation.
 
        
             
        
        
        
Answer:
I didn't know these questions sorry