To get the total resistance in a parallel circuit, you need to remember that unlike in a series, you do not just merely add the resistances. You need to get the reciprocal first of each resistance and add them together. 

After adding them, you will get the reciprocal again and then compute for the value. The problem says that there are 4 resistors in the circuit that have a resistance of 75.

Add up the numerator and copy the denominator:

Then get the reciprocal to get the total resistance:

The answer to your question then is A. 18.8.
 
        
        
        
Answer:
a The kinetic energy is  
b The height of the center of mass above that position is   
    
Explanation:
From the question we are told that
   The length of the rod is  
    The mass of the rod  
  
    The angular speed at the lowest point is 
Generally moment of inertia of the rod about an axis that passes through its one end is 
                     
  
Substituting values 
                
                
 Generally the  kinetic energy rod is mathematically represented as 
              
                     
                            
From the law of conservation of energy 
The kinetic energy of the rod during motion =  The potential energy of the rod at the highest point 
    Therefore 
                    
                         
                              
                                  
    
                  
 
        
                    
             
        
        
        
Answer:
 If the distance is doubled, the force of gravity between the two bodies is one-fourth as strong as before
Explanation:
The force of gravity between two bodies depends on the mass and distance. But we will focus on distance since that's what the question asks
Therefore, the force of gravity decreases as distance between the bodies increases.
 
        
             
        
        
        
Answer:
there should some picture to identify right?
pls edit your question and insert the picture..
 
        
                    
             
        
        
        
Hello,
The answer is "universe, Milky Way, clusters, stars, planets".
Reason:
The universe would be the biggest because it has all the galaxy's, starts, clusters, and planets into one. Then it would be Milky Way because this is a galaxy that contains: stars, planets, and clusters. Then it would be clusters because that contains stars, or planets in one group. Then be stars because stars are bigger than planets. Then it would be planets. Therefore the order should go like this: <span>Milky Way, universe, planets, clusters, and stars.
If you need anymore help feel free to ask me!
Hope this helps!
~Nonportrit</span>