A spontaneous reaction is a term that is best describe to a type of reaction wherein it is started without even with the help of an outside force. In addition to that, this kind of reaction is commonly driven by the forces of enthalpy and entropy which are essential concepts to thermodynamics.
The net or resultant force acting on an object is equal to the rate of change of momentum. We can therefore say that because a net force causes an object to change its motion, it also causes its momentum to change with it.
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lícita; de navegar y comerciar; de peticionar a las autoridades; de entrar, permanecer, transitar y salir del territorio argentino; de publicar sus ideas por la prensa sin censura
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4 is a
Explanation: fixed pulley changes direction