Answer:
A white dwarf, also called a degenerate dwarf, is a stellar core remnant composed mostly of electron-degenerate matter. A white dwarf is very dense : its mass is comparable to that of the Sun, while its volume is comparable to that of Earth.
Explanation:
"My enemies enemy is my friend"; this affected both WWII and the Cold War. Because of this, the U.S. supported a number of harsh dictatorships.
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Answer:
Alhazen/Johannes Kepler-Camera Obscura
Explanation:
Find sources online that cover it, especially those that end in .gov, .org, or .edu. I've included some credible ones throughout my response.
Begin by giving an overview of who Alhazen was (https://www.famousinventors.org/alhazen) and then cover Johannes Kepler and how he coined the term 'Camera Obscura' (https://www.artpublish.com/camera-obscura/).
Next give an overview of the Camera Obscura and how it works (https://www.uh.edu/engines/epi1772.htm or https://www.britannica.com/technology/camera-obscura-photography).
