Fermi
Angstrom
Newton
Tesla
Answer is Right!
Answer is Wrong!
The correct answer is A. Fermi.
A fermi is a unit of length equal to 10^-15 meters. It is named after Enrico Fermi, an Italian-American physicist who was awarded the Nobel Prize in Physics in 1938 for his work on nuclear fission.
Nuclear sizes are typically expressed in fermis because this unit is convenient for representing the very small sizes of nuclei. For example, the radius of the proton is about 1 fermi, and the radius of the uranium-238 nucleus is about 10 fermis.
The other options are incorrect. Angstrom
is a unit of length equal to 10^-10 meters. Newton is a unit of force. Tesla is a unit of magnetic field strength.