In the United States, the Common Frequency Is 50 Hz

question 3

True/False

In the United States, the common frequency is 50 Hz.

---

Definitions:

Fossil Record

The total number of fossils that have been discovered, as well as the information derived from them, offering a chronological account of the history of life on Earth.

Genealogical Tree

A chart representing family relationships in a tree structure, similar to a pedigree chart but more detailed.

Phylogenetic Tree

A diagram that represents evolutionary relationships among various biological species or entities based upon similarities and differences in their physical or genetic characteristics.

Mammalian Middle Ear

A part of the ear in mammals that contains three bones, known as the ossicles, which transmit sound vibrations from the eardrum to the inner ear.