I think the answer should be a I’m not sure tho
        
             
        
        
        
Answer:
Check attachment for solution 
Explanation:
Given that 12V battery 
 
        
                    
             
        
        
        
pshyical change is a usually reversible change of a substance, as size or shape: Freezing a liquid is a physical change. Compare chemical change.
internal change is when the movement of the particles increases 
specific latent heat is the amount of energy per kg (unit mass) required to change ice to water without change in temperature.
 
        
                    
             
        
        
        
Answer:
The time constant is  
    
Explanation:
From the question we are told that 
    The spring constant is  
    The mass  of the ball is  
    The amplitude of the  oscillation t the beginning is 
     The amplitude after time t is  
     The number of oscillation is 
Generally the time taken to attain the second amplitude is mathematically represented as 
         Here  T is the period of oscillation
                                            Here  T is the period of oscillation 
          
=>     
=>     
Generally the amplitude at time t is mathematically represented as 
          
Here a is the damping  constant so 
  at   ,
 ,  
So  
      
=>  
taking natural log of both sides 
=>   
     
=>   
Generally the time constant is mathematically represented as 
      
       
=>  
     
=>  
     
 
        
             
        
        
        
Given:
Gasoline pumping rate, R = 5.64 x 10⁻² kg/s
Density of gasoline, D = 735 kg/m³
Radius of fuel line, r = 3.43 x 10⁻³ m
Calculate the cross sectional area of the fuel line.
A = πr² = π(3.43 x 10⁻³ m)² = 3.6961 x 10⁻⁵ m²
Let v =  speed of pumping the gasoline, m/s
Then the mass flow rate is 
M = AvD = (3.6961 x 10⁻⁵ m²)*(v m/s)*(735 kg/m³) = 0.027166v kg/s
The gasoline pumping rate is given as 5.64 x 10⁻² kg/s, therefore
0.027166v = 0.0564
v = 2.076 m/s
Answer:  2.076 m/s
The gasoline moves through the fuel line at 2.076 m/s.