The components of a 10.2 mg sample are sufficiently separated by a chromatographic column that is 2.5 cm in diameter and 50 cm long using a flow rate of 0.56 mL/min. To separate 205 mg of the sample with a similar separation of the components, what size column diameter and length should be used

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

Yes it would be a physical change.

H tricky one let me think and get back to u