La densidad del aire a 0°C (y presión de 1 atmósfera ) es 1.923 x 10-3 g/cm3. Cuál es la densidad del aire a esta temperatura
En gramos por litro ?

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

It has to be b i hope this

Hope the image of the frequency formula

Putting salt in vinegar water