Average speed = (total distance covered) / (time to cover the distance)
total distance covered = (4km + 2km + 1km) = 7 km
time to cover the distance = (32min + 22min + 16min) = 70 min
Average speed = (7 km) / (70 min)
Average speed = 0.1 km/minute
 
        
             
        
        
        
Brown black fur and medium tail
        
             
        
        
        
The difference between conductors and insulators is because
of electronic structure of atoms and molecules.
 
Anywhere we have free electrons, we have a hard conductor
where free electrons help in conduction.
 
In electrolytes, charged Ions do conduction.
 
Dielectrics (or insulators) don't have free electrons current.
 
Free electrons mean, the electrons that are not related with
a specific atom, they are allowed to move nearby the crystal lattice.
 
        
             
        
        
        
 Answer:
Part(a): The frequency is  .
.
Part(b): The speed of the wave is  .
.
Explanation:
Given:
The distance between the crests of the wave,  .
.
The time required for the wave to laps against the pier, 
The distance between any two crests of a wave is known as the wavelength of the wave. So the wavelength of the wave is  .
.
Also, the time required for the wave for each laps is the time period of oscillation and it is given by  .
.
Part(a):
The relation between the frequency and time period is given by

Substituting the value of  in equation (1), we have
 in equation (1), we have

Part(b):
The relation between the velocity of a wave to its frequency is given by

Substituting the value of  and
 and  in equation (2), we have
 in equation (2), we have
