The solutions would be : 
1. C
2. B
3. A
4. C
5. D.
        
             
        
        
        
Answer:
Electrostatic Force...or a non-contact force
Explanation:
 
        
             
        
        
        
Data:

n (Wave node)
V (Wave belly) 
L (Wave length)
<span>The number of bells is equal to the number of the harmonic emitted by the string.
</span>

Wire 2 → 2º Harmonic → n = 2







Wire 1 → 1º Harmonic or Fundamental rope → n = 1



If, We have: 
V = 42L
Soon:



Answer:
<span>The fundamental frequency of the string:
</span>
21 Hz
 
        
        
        
Answer:
Fd
Explanation:
Work is force times distance. If you push on an object really hard but it does not budge, you have still performed no work on it, because anything times zero is still zero.