Answer:
The speed after being pulled is 2.4123m/s
Explanation:
The work realize by the tension and the friction is equal to the change in the kinetic energy, so:
 (1)
 (1)
Where:

Because the work made by any force is equal to the multiplication of the force, the displacement and the cosine of the angle between them.
Additionally, the kinetic energy is equal to  , so if the initial velocity
, so if the initial velocity  is equal to zero, the initial kinetic energy
 is equal to zero, the initial kinetic energy  is equal to zero.
 is equal to zero.
Then, replacing the values on the equation and solving for  , we get:
, we get:


So, the speed after being pulled 3.2m is 2.4123 m/s
 
        
             
        
        
        
From the given equation we can deduce what changes will occur if the frequency of the sound is doubled
V= f (λ)
Speed = frequency. Wavelength  
When the frequency is doubled, speed will not change. Because speed depends on factors like temperature, air pressure, density of the gas. Since all these factors are unchanged thus speed will remain unchanged
Frequency is the number of waves produced per second. Frequency and wavelength are inversely proportional .Thus, if the frequency is doubled the wavelength would be halved.
 
        
             
        
        
        
A., 101.7 km/h is the correct answer for this question 
        
             
        
        
        
Answer:
Height above the floor from the bottom is 0.82m 
Form the top is 1.71m
Explanation:
See attached file
 
        
             
        
        
        
Answer:
Structural
Explanation:
Structural adaptations are a change to a organism's body, gills are part of the fish's body which would be why this is a structural adaptation!
Hope this helped! Stay safe have a good day or night!