This is the 12393rd most frequent Spanish word.
magnéticaes
It seems "magnéticaes" is a typo or non-standard word. The closest correct term is likely "magnética," which means "magnetic" in English.
The term 'magnética' is used here as an adjective modifying 'resonancia' to specify the type of medical imaging.
La resonancia magnética es un procedimiento médico común.
The magnetic resonance imaging is a common medical procedure.
Here, 'magnética' describes 'fuerza' to indicate the type of force related to magnetism.
La fuerza magnética es esencial para el funcionamiento de los imanes.
The magnetic force is essential for the functioning of magnets.
In this sentence, 'magnética' characterizes 'cinta' referring to the magnetic properties of tapes used for storage purposes.