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Dec
10
comment Light and mirrors
Yes. This conservation of momentum is the reason. Photons also have a momentum. Further information is given by quantum theory.
Nov
23
comment Finding the force required to center the cone
3 kN plus friction forces. You didn't define surface of youd mild steel.
Nov
2
comment Finding the force required to center the cone
What does the coefficient of sliding friction tell you about your force to center the cone? Think about it to answer your question. Then try to update your answer with these thought and the not understood problems you encounter. Use the edit button on your question to provide all relevant thoughts and you will get +1 of me.
Nov
2
comment Finding the force required to center the cone
+0 Welcome to Physics SE! As a first impression both materials (A and B) have to be defined in order to solve the problem. Large forces like $3\, kN$ tend to deformate materials. In this case FEM simulations will improve accuracy of answer.
Nov
2
comment Induced emf in AC generator
+1 Welcome to Physics SE!
Oct
18
comment Can electromagnetic fields be used to deconstruct and reconstruct molecular bonds?
Welcome to Physics SE! You answer the question in your first part. Please pose your questions in a separate question. It is optional to link to this question as a follow-up.
Aug
30
comment tensor products in special realitivity
Welcome to Physics SE! Prahar wants to highlight that we enjoy beautiful math by MathJax. This uses the same markup as LaTeX.
Jul
1
comment Why do we use the index of refraction for yellow light?
In addition to model with the Abbe coefficient, you may use refractiveindex.info as a source of wavelength dependacy. The difference to the model won't be large in the visible regime
May
31
comment Does Earth's Rotation Affect Its Shape?
Thank you for the answer and welcome to physics SE! The question explicitely asks about the influence of rotation on the shape of the earth. Please elaborate on this topic. Otherwise this may fail to answer the question.
Mar
9
comment How does one align a laser using two adjustable mirrors?
Could you elaborate on the laser alignment. Maybe sum up the key points in your link. In case there is link rot, your answer will no longer be useful. It seems a nice resource.
Jan
9
comment Salisbury Screens and Energy Conservation
Welcome to Physics SE!
Nov
11
comment Why do most metals appear silver in color with gold being an exception from a scattering and EM viewpoint?
I enjoyed the sequel of this topic. As @Gruenkohl pointed out the "skin depth axis should say nm not µm".
Oct
9
comment Atmospheric pressure's effect on sound
Welcome to Physics SE! Consider marking the question as answered by clicking the check mark near an answer. In that way the question disappears from the list of unanswered questions. :)
Oct
7
comment Uses of Static Electricity
Thanks, while editing I also thought of a capacitor :)
Oct
7
comment Uses of Static Electricity
Welcome to Physics SE. What have you tried to answer the question yourself? Please ask about a specific concept.
Sep
20
comment Can you punch a hole in an A4 sheet of paper with your hand?
A newspaper has a low bursting strength. The line where it is folded is a structural weakness. The trick even can be done with a newspaper in free fall - an archievement even for an martial arts artist.
Sep
18
comment Optimal size of a windmill for a given windspeed
Welcome to Physics SE! This is a common homework problem. Since length $r$ of blades is your concern, why not put it in the title? Here on PSE you find questions for "blade and wind" like a windmill with weighted blades or the homework hint for the work of a windmill. What have you tried to solve the problem?
Sep
14
comment Only transverse photons are gauge-invariant (Peskin page 298)
Welcome to Physics SE! You can add math inside Dollar brackets just like in LaTeX: $A_0$ It's called MathJax here. Others could understand your question if you included the equation.
Sep
11
comment Is there a possibility of hydrogen ignition when filling a weather balloon?
Welcome to Physics SE! What have you tried to calculate this static electricity? Where are you stuck?
Aug
24
comment Partial Pressure - Which solution is right?
Welcome to Physics SE! I edited your post to add the nice layout of the equations. MathJax on this website makes math more readable. Check it out! To learn it, just hit the edit button on your post and see, that the math simply is marked up using a dollar. SI units are separated by a small blank with "\,".