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What is level of difficulty of this physics problem? Is this problem good enough for exam in the Physics-2 course?
6 point charges, each of 1 coulomb, are located in coordinates: r1=1i, r2= -1i, r3=1j, r4=-1j, r5=1k, r6=-1k, where i,j, and k are unit vectors directed into direction of x, y, and z axes respectively. Where and what additional charge have you to put, to have in final no electrostatic net forces on all electric charges.
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17%
Regular High School, low level
50%
Regular High School, high level
0%
2-year college, engineering or science,
33%
2 year college, engineering or science,
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The Greatest Mistake In The History Of Physics
Aug 16, 2018, by Ethan Siegel

. . . if you aren't willing to put your theory or assumption
to the test, you might just make the greatest mistake
in the history of physics.

You cannot draw a conclusion, no matter how obvious
it seems, without performing the crucial experiment.
Physics is not decided by elegance, by beauty,
by the straightforwardness of arguments,
or by debate. It is settled by appealing to nature itself,
and that means performing the relevant experiment.

https://www.forbes.com/sites/startswithabang/2018/08/16/the-greatest-mistake-in-the-history-of-physics/#25ac98e62554
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Mathematics for the New Universe, Part Four, Chapter 24, The Geometry of Time: Part Two

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#Alphaparticlesource
#Alphaparticle
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P type and N type semiconductor.

#semiconductor #ptype #ntype
19/01/2019
3 Photos - View album
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The Event Horizon Telescope was designed to be able to measure the size of the black hole at the center of the galaxy. They were supposed to have some maps made about a year ago, but there were delays in getting all the observations together. Since that time there has been no real published results. The problem really is that the black hole appears to be quite a bit larger than it should be by at least 20%. This fits with the observations made when the gas cloud crashed into the object last year. There is a very good chance that the object at the center of the galaxy is not a black hole, but rather a type of super massive quark star. The researchers issued a paper in December that outlines that problem and presents a new type of algorithm that they hope may reduce the size of the black hole, As there is still no word on this it does not bode well for the proof of the existence of the black hole.

The attached article outlines the project and it's expectations.
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My Teaching Schedule > 2019 Spring Term
- Borough of Manhattan CC (BMCC)
- New York City College of Technology (City Tech)
- Lander College for Women, The Touro University
_______________________________________
Mo

City Tech, PHYS 1441-E470
General Physics I: Calc Bsed (Lecture)
Mo 6:00PM - 8:30PM,
Namm N-804
______________________________________
Tu

BMCC, SCI 120-093L
Computer Methods in Science (Lecture)
Tu 8:00AM - 10:45AM
Main Bldg N672

Lander College for Women, CPPN 150 - N
Conceptual Physics (Laboratory & Lecture)
Tu 1:00PM-2:00PM, 3:20 PM - 5:55 PM
__________________________________________
We

BMCC, SCI 120-093B
Computer Methods in Science (Laboratory)
We 9:00AM - 10:40AM
Main Bldg N672

CityTech, PHYS 1433-D743
General Physics I: Alg Based (Laboratory)
We 4:00PM - 5:40PM
Namm N-722

City Tech, PHYS 1441-E470
General Physics I: Calc Bsed (Lecture)
We 6:00PM - 6:50PM
Namm N-804
_______________________________________
Th
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Fr

BMCC, AST 108-144
Astronomy: General Theory (Lecture)
Fr 2:00PM - 4:45PM
Main Bldg S720