Rafiq, Muhammad. “Physics: Definition and Branches.” Owlcation, 21 Aug. 2019, https://owlcation.com/stem/Physics-Definition-and-Branches.
https://www.spacetelescope.org/images/heic0515a/ Credit:NASA, ESA and Allison Loll/Jeff Hester (Arizona State University). Acknowledgement: Davide De Martin (ESA/Hubble)
McGrayne, Sharon Bertsch, et al. “Atom.” Encyclopædia Britannica, Encyclopædia Britannica, Inc., https://www.britannica.com/science/atom.
“Education & Careers.” Biophysical Society, https://www.biophysics.org/what-is-biophysics
“Earth's Structure.” Earth's Structure: Melbourne Museum, https://museumsvictoria.com.au/website/melbournemuseum/discoverycentre/dynamic-earth/overview/the-earth-and-moon/earths-structure/index.html.
“Simple Machine.” Wikipedia, Wikimedia Foundation, 6 Aug. 2019, https://en.wikipedia.org/wiki/Simple_machine.
“New Picture of Atomic Nucleus Emerges: Argonne National Laboratory.” New Picture of Atomic Nucleus Emerges | Argonne National Laboratory, https://www.anl.gov/article/new-picture-of-atomic-nucleus-emerges.
B********m, et al. “Thermodynamics: Four Laws That Move the Universe.” The Great Courses Plus, https://www.thegreatcoursesplus.com/thermodynamics.