Particle A has a mass of 2 and a charge of -1. Particle B has a mass of 2 and a charge of +1. Are particle A and B necessarily antiparticles? Explain your answer.
No, because charge and mass alone does not uniquely specify a particle.
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To determine if particles A and B are antiparticles, we need to compare their properties. Antiparticles are particles that have the same mass but opposite charges.
In this case, particle A has a mass of 2 and a charge of -1, while particle B has a mass of 2 and a charge of +1. Since both particles have the same mass, we need to check if their charges are opposite.
As we can see, particle A has a negative charge (-1), while particle B has a positive charge (+1). Since their charges are indeed opposite, we can conclude that particle A and particle B are indeed antiparticles of each other.
To summarize, the particles A and B are antiparticles because they have the same mass but opposite charges.