Answer:
I belive it would be ture
Explanation:
It's been a while since I learned this but I think that is right.
 
        
                    
             
        
        
        
Answer
given,
wavelength of light in air = 700 nm
Wavelength of light in water = 530 nm
We know that speed of light changes when it moves from one medium to another.
And the frequency of the wavelength does not changes if the medium changes.
 we also know that, 
                                     v = ν λ
From the above equation we can say that if frequency is constant so, with the change in  velocity changes wavelength will also change.
Hence, wavelength is the property of the wave which determines color.
 
        
             
        
        
        
Answer:
38 cm from q1(right) 
Explanation:
Given, q1 = 3q2 , r = 60cm = 0.6 m
Let that point be situated at a distance of 'x' m from q1.
Electric field must be same from both sides to be in equilibrium(where EF is 0). 
=> k q1/x² = k q2/(0.6 - x)²
=> q1(0.6 - x)² = q2(x)² 
=> 3q2(0.6 - x)² = q2(x)²
=> 3(0.6 - x)² = x²
=> √3(0.6 - x) = ± x 
=> 0.6√3 = x(1 + √3) 
=> 1.03/2.73 = x 
≈ 0.38 m = 38 cm = x
 
        
             
        
        
        
8500 Hz and Longitudinal 
Speed = frequency x wavelength 
Speed of sound at 20 degrees Celsius is approximately 340 m/s