For the answer to the question above asking to d<span>etermine the density of the proton. 
</span>Density is mass over volume. 
The volume of a sphere is 4πr³/3. r is half the diameter. 
So the density would be 2.3×10¹⁷ kg/m³. 
I hope my answer helped you. Feel free to ask more questions. Have a nice day!
        
                    
             
        
        
        
Answer:
a) p=0, b) p=0, c) p= ∞
Explanation:
In quantum mechanics the moment operator is given by
               p = - i h’  d φ / dx
              h’= h / 2π
We apply this equation to the given wave functions
a)  φ =  
         .d φ dx = i k  
 
We replace
         p = h’ k  
         i i = -1
The exponential is a sine and cosine function, so its measured value is zero, so the average moment is zero
             p = 0
b) φ = cos kx
            p = h’ k sen kx
 The average sine function is zero,
           p = 0
c) φ =  
          d φ / dx = -a 2x   
          .p = i a g ’2x   
        The average moment is
          p = (p₂ + p₁) / 2
          p = i a h ’(-∞ + ∞)
          p = ∞
 
        
             
        
        
        
Answer:
The answer is D.
Explanation:
There is no gravity in Space so that means that it will decrease your weight but not your mass.
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Answer:
 c
Explanation:
all the others r physical 
 
        
                    
             
        
        
        
X + y = 5
x = 5 - y
2x - y = 7
2(5-y) - y = 7
10 - 2y - y = 7
10 - 3y = 7
10 - 7 = 3y
3 = 3y
y = 1 
x + y = 5
x + 1 = 5
x = 5 - 1
x = 4