Answer:
Without this slack, a locomotive might simply sit still and spin its wheels. The loose coupling enables a longer time for the entire train to gain momentum, requiring less force of the locomotive wheels against the track. In this way, the overall required impulse is broken into a series of smaller impulses. (This loose coupling can be very important for braking as well).
Explanation:
 
        
             
        
        
        
Answer:
 the government's use and control of science. To clarify, I live in the U.S. I'm only interested in how the U.S. government dictates science. If you have any information or links that could educate me on this topic, I would be appreciative.
Explanation:
 
        
                    
             
        
        
        
Answer:
0.47 m
Explanation:
 = Number of vibrations = 37
 = Number of vibrations = 37 
 = total time taken = 33 s
 = total time taken = 33 s 
 = time period of each vibration
 = time period of each vibration
frequency of vibration is given as 
 Hz
 Hz
 = distance traveled along the rope = 421 cm = 4.21 m
 = distance traveled along the rope = 421 cm = 4.21 m 
 = time taken to travel the distance = 8 s
 = time taken to travel the distance = 8 s
 = speed of the wave
 = speed of the wave
Speed of the wave is given as 

 = wavelength of the harmonic wave
 = wavelength of the harmonic wave 
wavelength of the harmonic wave is given as 
