Appropriately named, <u>slow pain </u>oftentimes is not detected until seconds or even minutes after an injury; this is due to the activation of chemically sensitive pain receptors.
Explanation:
According to physiology of pain, slow pain arises when unmyelinated C fibers of the muscles are activated. This is pronounced as a dull and aching pain and is more diffuse in nature rather than fast pain which are more acute and rapid. 
Most of the times this pain will not be detected immediately after the stimulus like an injury but may start slowly.  
Slow pain can also be burning, throbbing or even nauseous. Chronic pain conditions mostly are characterized by slow pain.  
Slow pain is elicited by stimuli like mechanical, chemical or thermal which are received by the chemically sensitive pain receptors on the skin or other organs of the body.
 
        
             
        
        
        
 <span>All living organisms have a shared ancestor deep in the past, so all living organisms are related to some degree. We might share 99.8% DNA with chimps, but we also share maybe (just a guess, I don't remember the exact number) 24% DNA with lettuce. If all living organisms are related, than their genetic code is universal - one and the same for all organisms.</span>
        
                    
             
        
        
        
The answer that is not caused by a gravitational pull is two atoms come together to form a molecule because atoms form molecules because of the electrons, and not gravitational pull.
Therefore the correct answer would be,
Two atoms come together to form a molecule.
I hope that this has satisfied you.
 
        
             
        
        
        
Soy inglés. Solo hablo un poco de español, disculpe si la traducción es mala
1) Utilice botellas de agua reutilizables
2) No pongas químicos peligrosos por el desagüe
3) Reciclar aceite de motor
4) Reciclar plasticos
5) Reducir las emisiones de automóviles
6) Iniciar una pila de compost
7) Educar a las personas
8) Camina, no conduzcas
9) Deja de fumar
10) Reducir la deforestación