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Forensic scientists can determine if a bullet hole is an exit or entry thanks to the<u> appearance </u><u>of </u><u>glass surface.</u>
<h3>Bullet contact with glass</h3>
- When a bullet goes through glass, it would take more of the glass surface that it hits along with it.
- This leads to the front hole being smaller than the exit hole.
Looking at the glass surface will then allow the scientist to note where the bullet came from based on which hole is larger.
In conclusion, a glass surface helps.
Find out the importance of forensic science at brainly.com/question/5844778.
Answer: is constant
Explanation:
In order to analyze the velocity of the stars within a galaxy, the <u>galaxy rotation curves</u> (developed by the American astronomer Vera Rubin) are used. These graphs are elaborated as a scatter diagram in which the orbital velocity of the stars present in a galaxy is represented on the Y axis and the distance of these stars to the center of the galaxy on the X axis.
Thanks to this diagram, it has been possible to observe a characteristic behavior in the rotation speed of the stars (and gas) present in the galaxies, which differs from the rules of the orbital movement of the planetary systems postulated by Newton and Kepler.
This means that in these galaxy rotation curves it has been observed that the rotation speed of stars and gas is "constant", regardless of the distance to the center of the galaxy. This discrepancy and these results were then used to demonstrate the existence of dark matter in the universe.
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