Answer:
 ρ/ρ2 = 3 / R₀       the two densities are different
Explanation:
Density is defined as
        ρ = M / V
As the nucleus is spherical
        V = 4/3 π r³
Let's replace
       ρ = A / (4/3 π R₀³)
       ρ = ¾ A / π R₀³
b)
       ρ2 = F / area
The area of a sphere is
      A = 4π R₀²
      ρ2 = F / 4π R₀²
      ρ2 = F / 4π R₀²
Atomic number is the number of protons in the nucleon in not very heavy nuclei. This number is equal to the number of neutrons, but changes in heavier nuclei, there are more neutrons than protons.
Let's look for the relationship of the two densities
      ρ/ρ2 = ¾ A / π R₀³ / (F / 4π R₀²)
      ρ /ρ2 = 3 (A / F) (1 / R₀)
In this case it does not say that the nucleon number is A (F = A), the relationship is
      ρ/ρ2 = 3 / R₀
I see that the two densities are different
 
        
             
        
        
        
Answer: the photograph will likely show only one star.
Explanation: 
Since their angular separation is smaller than the telescope's angular resolution, the picture will apparently show only one star rather than two.
 
        
             
        
        
        
Answer:
The main physical characteristics of matter are mass, volume, weight, density, odor, and color. These are the characteristics that help us to see matter, feel matter, and taste matter.
Explanation:
 
        
             
        
        
        
Answer:
Difference threshold or also Just Noticeable Difference
Explanation:
The above mentioned case between room mates, where one room mate was able to detect a minute change in volume shows an instance of the difference threshold.
Difference threshold can be defined as stimulation at its minimum level that can be detected by an individual almost 50 % of the times. 
It is the lowest possible level of sound that is detectable by a person.
That is what happened in the mentioned case that when the volume was increased from 14 to 15, Amber was able to detect it.