The answer is electron
Explanation: An atom consists of a small but massive nucleus that include protons (positive charge) and neutrons (neutral charge). around the nucleus is a cloud of rapidly moving electrons (negative charge)
        
             
        
        
        
Answer:
M=125 kg
v=1.75 m/s
Explanation:
  From the law of linear momentum
   P =mv
Case 1     50*V =M* 0.7     equation 1
                50*V =(M+50)* 0.5    equation 2
equating 1 and 2 
                M* 0.7=(m+50)* 0.5
                0.2 M= 25
                      M=125 kg 
Putting value of M in equation 1
                50*V =125*0.7
                      V=1.75 m/s
                     
 
        
                    
             
        
        
        
Answer:
The answer is the mass of d
 
        
             
        
        
        
Answer:
0.78 m
Explanation:
The relationship between wavelength and frequency of a wave is given by

where
v is the speed of the wave
f is the frequency
 is the wavelength
 is the wavelength
For the sound wave in this problem, we have
 is the frequency
 is the frequency
v = 344 m/s is the speed of sound in air
Substituting into the equation and re-arranging it, we find the wavelength:
