the Doppler effect 
it is the change in frequency or wavelength of a wave for an observer moving relative to its source 
 
        
             
        
        
        
True, to some extent. It can be subjective; however.
        
                    
             
        
        
        
Answer:
Ważne jest napisanie wprowadzenia do eseju. Musisz przyciągnąć uwagę czytelnika. Możesz to zrobić, cytując coś, mówiąc coś zabawnego.
(Przepraszam, to wszystko, co wiem)
Hope this Helps!
 
        
             
        
        
        
Answer:
Q2/ Answer correctly or wrongly: (1- The past and the matter are already shared in the sign of the actor's moving t) 2 Literary text: O my forbidden country of poetic works written by the poet Saleh al-Zahrani (3 the weak act comes only with the poetic works that "4- the past act indicated an event that took place in the past time. 5- The act indicated the request for the act to take place from mucus 6- the extreme whisper if a static letter written on 7- the effect of it comes only with the transgressive acts (8- the five acts are lifted and a sign raised by the proof of the none) () () C-N. (C
Explanation: