in this investigation, some groups used a magnet inside a snack size plastic bag. the bag prevented attracted magnetic particles from sticking directly on the magnet. the models below show two other ways magnetism can be used to separate particles in a mixture. use either models to provide evidence that fields exist between objects exerting forces on each other even though the objects are in contact. indicate the model you are using for evidence in your response in this investigation, some groups used a magnet inside a snack size plastic bag. the bag prevented attracted magnetic particles from sticking directly on the magnet. the models below show two other ways magnetism can be used to separate particles in a mixture. use both models to provide evidence that fields exist between objects exerting forces on each other even though the objects are in contact. indicate the model you are using for evidence in your response