Answer:
a machine capable of carrying out a complex series of actions automatically, especially one programmable by a computer.
 
        
             
        
        
        
Answer:
  r = 102.43 m
Explanation:
Newton's second law for this case is
               F = ma
Where the acceleration is centripetal
             a = v² / r
             r = v² / a
They indicate that the radial acceleration is 8.45 g
            r = v² / 8.45 g.
            r = 92.1² / 8.45 9.8
            r = 102.43 m
 
        
             
        
        
        
Answer:
Explanation:
In the calculation of distance we do not take into account the direction of movement .So only magnitude of movement is taken care of.
On the other hand , in respect of displacement , we take into account even direction of movement along with magnitude. 
Distance covered by flea = 45 - 27 = 18 cm
Displacement by flea = 27 - 45 = - 18 cm 
Speed = Distance covered / time 
= 18 / 3 = 6 cm / s 
Velocity = - 18 / 3 = - 6 cm /s. 
 
        
             
        
        
        
Answer:
reviewing the statement we can say that it is FALSE
Explanation:
The Doppler effect is the change in the perceived frequency of a sound wave by the RELATIVE MOTION of the source and the observer.
This effect is very useful for finding the speed of an object.
When reviewing the statement we can say that it is FALSE
 
        
             
        
        
        
Answer:
a) 2.41 km
b) 38.8°
Questions c and d are illegible.
Explanation:
We can express the displacements as vectors with origin on the point he started (0, 0).
When he traveled south he moved to (-3, 0).
When he moved east he moved to (-3, x)
The magnitude of the total displacement is found with Pythagoras theorem:
d^2 = dx^2 + dy^2
Rearranging:
dy^2 = d^2 - dx^2


The angle of the displacement vector is:
cos(a) = dx/d
a = arccos(dx/d)
a = arccos(3/3.85) = 38.8°