You plan to use the water displacement method to determine if a ring is pure silver. Each of these tools Is
required, EXCEPT
A balance
A stopwatch
A measuring cup filled with water
A density of elements chart

Chewy,wrapped,not in all white,the wrapper is clear

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