This has to do with independent and dependent variables. The independent variable is what affects the dependant variable, so the question is, does a students mark on a test affect their hours of sleep or does their hours of sleep affect their test results? Which one makes more sense? I would say the latter.
        
             
        
        
        
Answer:
The transfer of heat by the movement of fluid is called Convection Heat Transfer
Explanation:
Heat transfer by convection is the transfer of heat by fluid transport from one place to another, such that convection takes place when the heat that comes in contact of fluid containing body is moved to other parts of the container by the transporting fluid
Heat is transferred within a fluid medium mainly by convection (movement of heat by the transfer of fluid particles in the medium)
Convection heat transfer is a combination of conduction and advection heat transfer
 
        
             
        
        
        
Answer:
a
  Solid Wire      
      
   Stranded  Wire  
b
   Solid Wire    
 
    Stranded  Wire   
 
Explanation:
Considering the first question 
From the question we are told that 
   The  radius of the first wire is  
   The radius of  each strand is  
   The current density in both wires is  
Considering the first wire 
      The  cross-sectional area of the first wire is 
       
= >   
 
= >   
 
Generally the current in the first wire is    
      
=>  
=>   
 
Considering the second wire  wire 
The  cross-sectional area of the second wire is 
      
=>     
=>  
Generally the current is   
       
=>    
=>    
Considering question two  
  From the question we are told that 
      Resistivity is  
      The  length of each wire  is  
Generally the resistance of the first wire is mathematically represented as 
      
 
=>  
 
=>  
 
Generally the resistance of the first wire is mathematically represented as 
      
 
=>  
 
=>  
 
 
        
             
        
        
        
F equals 3N with respect to the circle's center, moving in the same direction as the centripetal acceleration.
<h3>How much centripetal force is there in a centrifuge?</h3>
Centripetal force is the force that pushes an item in the direction of its center of curvature. It is fundamental to how a centrifuge operates.
<h3>On a roller coaster, what is centripetal force?</h3>
An item travelling in a circle is pushed inward toward what is known as the center of rotation, which is essentially what a roller coaster accomplishes when it travels through a loop. The force that maintains an object moving along a curved route is this pull toward the center, or centripetal force.
To know more about centripetal force visit:-
brainly.com/question/11324711
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