2. A lab group turned in their experiment and had measured the mass of their sample to be 3.15 g. The teacher had asked for them to make a sample of 3.10 g (the
accurate value). What is their percent error?

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later

Answer) by studying proton collisions hope this : )