A wave loses energy as it moves through a medium.
Answer: v = 
Explanation: q = magnitude of electronic charge = 
mass of an electronic charge =
V= potential difference = 4V
v = velocity of electron
by using the work- energy theorem which states that the kinetic energy of the the electron must equal the work done use in accelerating the electron.
kinetic energy =
, potential energy = qV
hence, 

The correct answer would be a molecule
Answer:
I don't know if it's fair for me to write an entire essay for you
but if you would like I can list some reasons you can incorporate into an essay.
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-If you are joining a gang you are most likely going to have a greater chance of being targeted, even if it seems like you would be protected.
-Most of the time when someone joins a gang a child is being separated from a parent and will face most aggression.
-This can also cause academic failure in students, from lack of education and probably a pretty bad background.
-For teens when joining a gang they will do things that aren't suited for their age (I would list things but I'm not trying to get myself reported if you know what I mean)
-You will also have a great risk of being imprisoned and facing bad consequences, and these consequences can even be having the death penalty.
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I hope this is good enough, sorry I didn't give you a full essay. I think this should help with that though.