<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_es">física</topic></authority><related type="narrower"><topic>geofísica</topic></related><related type="narrower"><topic>física aplicada</topic></related><related type="narrower"><topic>acústica</topic></related><related type="narrower"><topic>física de partículas</topic></related><related type="narrower"><topic>hidráulica</topic></related><related type="narrower"><topic>física matemática</topic></related><related type="narrower"><topic>mecánica</topic></related><related type="narrower"><topic>física nuclear</topic></related><related type="narrower"><topic>óptica</topic></related><related type="narrower"><topic>radiología</topic></related><related type="narrower"><topic>electrónica</topic></related><related type="narrower"><topic>building physics (traducció pendent)</topic></related><related type="narrower"><topic>photonics (traducció pendent)</topic></related><related type="other"><topic>conceptos físicos</topic></related><related type="other"><topic>físicos</topic></related><related type="broader"><topic>ciencias físicas</topic></related> <note xml:lang="es"><![CDATA[ Ciencia que estudia las leyes que determinan la estructura del universo observable y la interacción entre sus constituyentes fundamentales, tales como materia y energía, con el objetivo principal de explicar fenómenos naturales. ]]></note></mads>