Answer:
<em>0.97c</em>
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Explanation:
From the relativistic equation for length contraction, we have
 =
 = 
where
 is the final length of the object
 is the final length of the object
 is the original length of the object before contraction
 is the original length of the object before contraction
β = 
where v is the speed of the object
c is the speed of light in free space = 3 x 10^8 m/s
The equation can be re-written as
 /
/ =
 = 
For the length to contract to one-fourth of the proper length, then
 /
/ = 1/4
 = 1/4
substituting into the equation, we'll have
1/4 = 
substituting for β, we'll have
1/4 = 
squaring both side of the equation, we'll have
1/16 = 1 - 
 = 1 - 1/16
 = 1 - 1/16
 = 15/16
 = 15/16
square root both sides of the equation, we have
v/c = 0.968
v = <em>0.97c</em>
 
        
             
        
        
        
Energy flows with kinetic energy
        
             
        
        
        
Explanation:
Below is an attachment containing the solution. 
 
        
                    
             
        
        
        
Answer: boyles law I’m pretty sure
        
             
        
        
        
It will make the shirt very hot because the color black absorbs all colors of the color spectrum. So never war a black shirt on a sunny day.<span />