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1. Who wants to be a Millionaire logic question... Set Theory, Logic, Probability, Statistics ‧ invalid@example.com (Wi_N)
2. Gravitomagnetic experiment Special and General Relativity ‧ invalid@example.com (olgerm)
3. How can I compose these like (y^2-x^2)(z^2-x^2)(z^2-y^2) Precalculus Mathematics Homework Help ‧ invalid@example.com (requied)
4. Homemade solenoids and professional solenoids Electrical Engineering ‧ invalid@example.com (paradisePhysicist)
5. Moment of inertia where mass and torque are at a different positions Classical Physics ‧ invalid@example.com (chananyag)
6. COVID-19 Coronavirus Containment Efforts General Discussion ‧ invalid@example.com (BWV)
7. Eddy currents in Faraday's Law Experiment Introductory Physics Homework Help ‧ invalid@example.com (KDPhysics)
8. Why is 2.5 times the radius the minimum height needed to do a loop? Classical Physics ‧ invalid@example.com (IsakVern)
9. Why is the kinetic energy equation multiplied by ½? Classical Physics ‧ invalid@example.com (rajen0201)
10. A question about quantities vs units in physical laws Classical Physics ‧ invalid@example.com (etotheipi)
11. Changes to the types of questions asked in specific sub-forums Feedback and Announcements ‧ invalid@example.com (rcgldr)
12. Collection of Science Jokes P2 General Discussion ‧ invalid@example.com (Greg Bernhardt)
13. What happens if you put a sphere (ball) on the top of a pyramid? Classical Physics ‧ invalid@example.com (zvwner)
14. I had an Idea that wasn't as impressive as I thought it was, Comments? STEM Academic Advising ‧ invalid@example.com (phoenix95)
15. Holding a spinning bicycle wheel while sitting on a stool that's free to rotate Introductory Physics Homework Help ‧ invalid@example.com (LCSphysicist)
16. Boundary Conditions For Modelling of a Fluid Using Euler's Equations Differential Equations ‧ invalid@example.com (person123)
17. This linear system has a solution? (Gauss' elimination) Linear and Abstract Algebra ‧ invalid@example.com (requied)
18. Strong Mw5.8 Quake New Zealand Earth Sciences ‧ invalid@example.com (davenn)
19. Power generated by an engine Introductory Physics Homework Help ‧ invalid@example.com (Okpluto)
20. Compressing Light Quantum Physics ‧ invalid@example.com (Elbraido)
21. Space of CFTs Beyond the Standard Model ‧ invalid@example.com (PrashantGokaraju)
22. Descent into a rotating black hole, do you hit the ring singularity? Special and General Relativity ‧ invalid@example.com (MikeeMiracle)
23. Why are protons allowed in the nucleus? Quantum Physics ‧ invalid@example.com (Andrew Wright)
24. EMF shielding using a conductor Introductory Physics Homework Help ‧ invalid@example.com (KDPhysics)
25. Visualizing the Fourier transform using the center of mass concept Calculus ‧ invalid@example.com (Shreyas Samudra)
26. The proper Schwarzschild radial distance between two spherical shells Astronomy and Astrophysics ‧ invalid@example.com (Buzz Bloom)
27. Questions about the energy released by nuclear fission High Energy, Nuclear, Particle Physics ‧ invalid@example.com (brent1369)
28. Collection of Lame Jokes General Discussion ‧ invalid@example.com (quddusaliquddus)
29. Testing whether VLC works on DVDs from various regions Computing and Technology ‧ invalid@example.com (Stephen Tashi)
30. Reference For The Historical Context of Dedekind Cuts and Why the need General Math ‧ invalid@example.com (MidgetDwarf)
31. How Do You Calculate Forces when The Lorentz Force Doesn't Seem to Apply? Electrical Engineering ‧ invalid@example.com (Keasy)
32. About the proper velocity Special and General Relativity ‧ invalid@example.com (hagopbul)
33. Is this an indication that I should stay away from higher math? STEM Academic Advising ‧ invalid@example.com (Hsopitalist)
34. Home-made AC-generator Electrical Engineering ‧ invalid@example.com (papercace)
35. Question about electrical networks Electrical Engineering ‧ invalid@example.com (neverevernever)
36. The real reason for a capacitor having the same amounts of + and - charges on the two plates Classical Physics ‧ invalid@example.com (feynman1)
37. Rigorously covering mathematical prerequisites for Graduate courses STEM Academic Advising ‧ invalid@example.com (crimeanwarcrimes)
38. Gravity, Air Friction, Drag, 50, 60, 70, 100 miles up? Classical Physics ‧ invalid@example.com (gary350)
39. Thickness of dark wet spots on drying dishes Classical Physics ‧ invalid@example.com (Orthoceras)
40. What is the connection between different interpretations of QM and QFT? Does QFT somehow render the study of QM foundations "pointless"? Quantum Interpretations and Foundations ‧ invalid@example.com (AndreasC)
41. What do we mean by ontology? Quantum Interpretations and Foundations ‧ invalid@example.com (ftr)
42. PF Photo Contest - All By Myself (5/23-5/29) General Discussion ‧ invalid@example.com (ZapperZ)
43. Dirac Lagrangian and Covariant derivative Quantum Physics ‧ invalid@example.com (PeroK)
44. Pushing a book against a wall and keeping it up Introductory Physics Homework Help ‧ invalid@example.com (Stewie117)
45. Radiation Therapist to Medical Dosimetrist or Physicist STEM Academic Advising ‧ invalid@example.com (Kschoess)
46. Do LED lights flicker? Electrical Engineering ‧ invalid@example.com (etotheipi)
47. Should I enroll in a python course or java? (I’m studying physics) STEM Academic Advising ‧ invalid@example.com (Theonefrom1994)
48. Possibility that all current interpretations of QM are wrong Quantum Interpretations and Foundations ‧ invalid@example.com (joegibs)
49. Electron Affinity Biology and Chemistry Homework Help ‧ invalid@example.com (SSG-E)
50. Cantilever beam deflection with point mass and point load at the end Mechanical Engineering ‧ invalid@example.com (koolraj09)
51. Safe to charge Lithium with Voltage Limit? Electrical Engineering ‧ invalid@example.com (NTL2009)
52. Young's double slit equation problem Introductory Physics Homework Help ‧ invalid@example.com (sincosine)
53. Geiger Counter and ultraviolet light sources Other Physics Topics ‧ invalid@example.com (Lotic7)
54. Probability in a dice game Set Theory, Logic, Probability, Statistics ‧ invalid@example.com (Norway)
55. Why gravitational potential energy is a system property? Classical Physics ‧ invalid@example.com (rajen0201)
56. Long quotes are not visible completely in the post preview Feedback and Announcements ‧ invalid@example.com (Wrichik Basu)
57. Question about irradiance from a UV lamp General Engineering ‧ invalid@example.com (piscosour00)
58. What is the reason the Gravitational Constant (G) varies? Earth Sciences ‧ invalid@example.com (rajen0201)
59. I need guidance please: what topic/math to study next Topology and Analysis ‧ invalid@example.com (benorin)
60. Want to learn Mathematica programming MATLAB, Maple, Mathematica, LaTeX ‧ invalid@example.com (Ishika_96_sparkles)
61. What is a modal analysis? Differential Equations ‧ invalid@example.com (Trying2Learn)
62. Structure adding rotational stiffness to plate Mechanical Engineering ‧ invalid@example.com (petterg)
63. Question on notation in Feynman Lectures on Physics III 3-1 Quantum Physics ‧ invalid@example.com (anuttarasammyak)
64. Understanding how to derive the relativistic-relative velocity formula Special and General Relativity ‧ invalid@example.com (JD_PM)
65. Schwarzschild from Minkowski? Special and General Relativity ‧ invalid@example.com (Demystifier)
66. Potential of a square plate Introductory Physics Homework Help ‧ invalid@example.com (Hamal_Arietis)
67. Uncertainty versus impossibility of measurement Quantum Physics ‧ invalid@example.com (SamRoss)
68. Olympic problem from kinematics -- Kicking a ball toward the goal with a side wind Introductory Physics Homework Help ‧ invalid@example.com (KrolKuabV)
69. Remote research positions after the Corona crisis? STEM Academic Advising ‧ invalid@example.com (simba)
70. Vibration Problems -- Why must there be two solutions to the DE? Differential Equations ‧ invalid@example.com (Trying2Learn)
71. Why is "time orthogonal to space" in inertial reference frames? Special and General Relativity ‧ invalid@example.com (Shirish)
72. How many different license plates can fit this description? A_ _ and three digits which contains 1 and 2 Precalculus Mathematics Homework Help ‧ invalid@example.com (requied)
73. .io URL doesn't open from MS-PPT, MS-Word Hyperlinks Computing and Technology ‧ invalid@example.com (Swamp Thing)
74. Guide to Designing Low Cost Ventilators for COVID-19 Biology and Medical ‧ invalid@example.com (Tom.G)
75. How would you build a solar stove that works at night & the next morning? General Engineering ‧ invalid@example.com (pskpi)
76. YouTube Classics, Part Deux General Discussion ‧ invalid@example.com (lisab)
77. Electrostatically charged materials and IPA Chemistry ‧ invalid@example.com (LT72884)
78. Second Derivative Question -- Help Understanding the Importance Please Calculus ‧ invalid@example.com (NoahsArk)
79. Math Challenge - May 2020 General Math ‧ invalid@example.com (fresh_42)
80. Anxious about majoring in physics — considering a switch to engineering STEM Career Guidance ‧ invalid@example.com (dpatnd)
81. Sachs and Wu's General Relativity for Mathematicians Science and Math Textbooks ‧ invalid@example.com (Avogadro Number)
82. Physical Motivation for Supersymmetry Beyond the Standard Model ‧ invalid@example.com (PrashantGokaraju)
83. Need some help with moment of intertia (relating to the propellers of a quadcopter) Aerospace and Astronautics Engineering ‧ invalid@example.com (mxchapz)
84. Fuzzy Green Glacier mice Biology and Medical ‧ invalid@example.com (jim mcnamara)
85. Free Springer books during lockdown! Science and Math Textbooks ‧ invalid@example.com (dRic2)
86. Hamilton path and circuit rounded path problem General Math ‧ invalid@example.com (requied)
87. Ion Linac and Electron Linac High Energy, Nuclear, Particle Physics ‧ invalid@example.com (dRic2)
88. Were science and engineering seen as distinct fields in 18th century Classical Physics ‧ invalid@example.com (PainterGuy)
89. Storing energy in an inductor Classical Physics ‧ invalid@example.com (mcastillo356)
90. Weird News Compilation General Discussion ‧ invalid@example.com (Evo)
91. Find the mass of one element of a sample Biology and Chemistry Homework Help ‧ invalid@example.com (jackthehat)
92. Random Thoughts part 6 General Discussion ‧ invalid@example.com (Evo)
93. Can the spin causes the collapse? Quantum Physics ‧ invalid@example.com (forofo)
94. QED, Electron-Proton Scattering: Rosenbluth cross-section Advanced Physics Homework Help ‧ invalid@example.com (lapantufla)
95. Understanding how to derive the cross-section formula in the CoM frame High Energy, Nuclear, Particle Physics ‧ invalid@example.com (JD_PM)
96. How does Sherwood's rotational work equation differ? Classical Physics ‧ invalid@example.com (etotheipi)
97. The word "won't" does not look logically formed Art, Music, History, and Linguistics ‧ invalid@example.com (symbolipoint)
98. 100% accuracy? General Discussion ‧ invalid@example.com (Merlin3189)
99. Nearly Scale Invariant Power Spectrum in inflation Cosmology ‧ invalid@example.com (windy miller)
100. Sudden polarity reversal in opposing permanent magnets? Other Physics Topics ‧ invalid@example.com (sw20)

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5 小时前 I had an Idea that wasn't so impressive as I thought it was. Comment? STEM Academic Advising ‧ invalid@example.com (phoenix95)
8 小时前 most energy nuclear fission High Energy, Nuclear, Particle Physics ‧ invalid@example.com (brent1369)
10 小时前 Electron Affinity Biology and Chemistry Homework Help ‧ invalid@example.com (SSG-E)
10 小时前 Apparent nonsense - Orthonormal Frames Special and General Relativity ‧ invalid@example.com (kent davidge)
11 小时前 why kinetic energy equation is multiplied by ½? Classical Physics ‧ invalid@example.com (rajen0201)
18 小时前 Cantilever beam deflection with point mass and point load at end Mechanical Engineering ‧ invalid@example.com (koolraj09)
23 小时前 Olympic problem from kinematics Introductory Physics Homework Help ‧ invalid@example.com (KrolKuabV)
24 小时前 How can I edit the following statement like (y2−x2)(z2−x2)(z2−y2) General Math ‧ invalid@example.com (requied)
2 天前 Wheel and stool Introductory Physics Homework Help ‧ invalid@example.com (LCSphysicist)
2 天前 Why does time dilation only affect one of the twins? Special and General Relativity ‧ invalid@example.com (ersa17)
2 天前 Why is the escape velocity equal to the square root of 2 times the orbital velocity? Classical Physics ‧ invalid@example.com (IsakVern)
2 天前 Calculate the expected value for filling up a cup Calculus and Beyond Homework Help ‧ invalid@example.com (Addez123)
2 天前 Need help developing a movement function for motor motion General Math ‧ invalid@example.com (assafMOCAP)
2 天前 The Ratio of Total Derivatives General Math ‧ invalid@example.com (Ahmed Mehedi)
2 天前 Questions about Partial Differentiation Operations Calculus ‧ invalid@example.com (Ahmed Mehedi)
2 天前 Effect of Covid-19 on architecture General Discussion ‧ invalid@example.com (Stephen Tashi)
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2 天前 Find mass of one element of a sample Biology and Chemistry Homework Help ‧ invalid@example.com (jackthehat)
2 天前 Show without computation that the following determinant is equal to 0 Precalculus Mathematics Homework Help ‧ invalid@example.com (coreanphysicsstudent)
2 天前 VOTE PF Photo Contest - Before Social Distancing General Discussion ‧ invalid@example.com (ZapperZ)
2 天前 How is realism understood in QM? Quantum Interpretations and Foundations ‧ invalid@example.com (Lynch101)
2 天前 Lensing Gravitational Waves Like Light? Cosmology ‧ invalid@example.com (sbrothy)
2 天前 Find the period of a pendulum consisting of a disk of mass M Introductory Physics Homework Help ‧ invalid@example.com (LCSphysicist)
2 天前 Complex Scattered polarization vector? (Conceptual) Introductory Physics Homework Help ‧ invalid@example.com (PhDeezNutz)
2 天前 Kinematics problem Introductory Physics Homework Help ‧ invalid@example.com (SSG-E)
2 天前 Why is the escape velocity square root of 2 times orbital velocity? Classical Physics ‧ invalid@example.com (IsakVern)
2 天前 Vibration Problem Differential Equations ‧ invalid@example.com (Trying2Learn)
2 天前 Why does time dilation affects only one of the twins? Special and General Relativity ‧ invalid@example.com (ersa17)
2 天前 Calculate expected value from filling up a cup Calculus and Beyond Homework Help ‧ invalid@example.com (Addez123)
2 天前 Is a scooter with big wheels easier to ride than one with small wheels? Classical Physics ‧ invalid@example.com (IsakVern)
2 天前 Anti-matter discovery before 1932? High Energy, Nuclear, Particle Physics ‧ invalid@example.com (Aidyan)
2 天前 Method of characteristics: Discontinuous source Calculus and Beyond Homework Help ‧ invalid@example.com (GwtBc)
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2 天前 Total Derivative General Math ‧ invalid@example.com (Ahmed Mehedi)
2 天前 Should I enroll in python course or java , I’m studying physics STEM Academic Advising ‧ invalid@example.com (Theonefrom1994)
2 天前 jackthehat Biology and Chemistry Homework Help ‧ invalid@example.com (jackthehat)
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2 天前 Kinetics Problem: Head-On Collision Between Two Cars Introductory Physics Homework Help ‧ invalid@example.com (Graador)
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3 天前 Magnetic field of cylinder (correction term) Classical Physics ‧ invalid@example.com (anaisabel)
3 天前 Mechanical engineering maths problem Mechanical Engineering ‧ invalid@example.com (newtonisaac101)
3 天前 Any good education journals, magazines, etc.? STEM Educators and Teaching ‧ invalid@example.com (SamRoss)
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3 天前 Question re spacial curvature K(r) w/r/t the Shwarzchild metric Differential Geometry ‧ invalid@example.com (Buzz Bloom)
3 天前 Understanding the Third Law of Newton -- How can the forces be equal? Introductory Physics Homework Help ‧ invalid@example.com (chucho11028)
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3 天前 Angular Rotation and Acceleration Introductory Physics Homework Help ‧ invalid@example.com (ocean1234)
3 天前 third law of Newton Advanced Physics Homework Help ‧ invalid@example.com (chucho11028)
3 天前 QuantumCat15 Feedback and Announcements ‧ invalid@example.com (QUANTUMCAT15)
3 天前 Temperature is a measure of the average kinetic energy of a gas? Other Physics Topics ‧ invalid@example.com (Avanthica)
3 天前 How is the wavelength of emitted EM radiation measured? Classical Physics ‧ invalid@example.com (PainterGuy)
3 天前 The angle through which a rotating wheel has turned in time t is given Introductory Physics Homework Help ‧ invalid@example.com (ocean1234)
3 天前 Free online textbooks from Cambridge Science and Math Textbooks ‧ invalid@example.com (archaic)
3 天前 Problem with gears -- One geared wheel spins up another Introductory Physics Homework Help ‧ invalid@example.com (LCSphysicist)
3 天前 Calculating the expected value of a dice roll Introductory Physics Homework Help ‧ invalid@example.com (Addez123)
3 天前 A dynamic arrow question Classical Physics ‧ invalid@example.com (Jrat)
3 天前 Integrating a function of which poles appear on the branch cut Calculus ‧ invalid@example.com (tworitdash)
3 天前 Partial Differentiation Calculus ‧ invalid@example.com (Ahmed Mehedi)
3 天前 Second degree functions General Math ‧ invalid@example.com (help)
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3 天前 Size of a light beam before and after Refraction Classical Physics ‧ invalid@example.com (csirvi)
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3 天前 Problem understanding these concepts in Jackson Special and General Relativity ‧ invalid@example.com (anbhadane)
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3 天前 What is meant by multiplication in physics? Introductory Physics Homework Help ‧ invalid@example.com (SSG-E)
3 天前 tilted plane with kinetic friction Introductory Physics Homework Help ‧ invalid@example.com (jamiebean)
3 天前 Going to learn Javascript as the first language of programming. Programming and Computer Science ‧ invalid@example.com (Adesh)
3 天前 tilted plane question Introductory Physics Homework Help ‧ invalid@example.com (jamiebean)
3 天前 A dilemma with stereochemistry Biology and Chemistry Homework Help ‧ invalid@example.com (Gourab_chill)
3 天前 forces Introductory Physics Homework Help ‧ invalid@example.com (jamiebean)
3 天前 EM: Separation of variables to find magnetic induction, problems Advanced Physics Homework Help ‧ invalid@example.com (phys194)
3 天前 Masses, pulley, friction and rotation Introductory Physics Homework Help ‧ invalid@example.com (LCSphysicist)
3 天前 Why do bacteria insert their genes into a host? Biology and Medical ‧ invalid@example.com (mark!)
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3 天前 Problem in understanding concept of Jackson. Special and General Relativity ‧ invalid@example.com (anbhadane)
3 天前 Temperature is a measure of average kinetic energy Other Physics Topics ‧ invalid@example.com (Avanthica)
3 天前 Control - Transfer function Engineering and Comp Sci Homework Help ‧ invalid@example.com (Setareh7796)
3 天前 second degree function General Math ‧ invalid@example.com (help)
3 天前 Storing an inductor Classical Physics ‧ invalid@example.com (mcastillo356)
3 天前 Confused about fluorescence at resonance Atomic and Condensed Matter ‧ invalid@example.com (Malamala)
3 天前 Profit / loss trading calculator for share market historical data Precalculus Mathematics Homework Help ‧ invalid@example.com (mp3streetpart)
3 天前 how the wavelength of emitted EM radiation is measured? Classical Physics ‧ invalid@example.com (PainterGuy)
4 天前 Help printing to a Zebra label printer from Tcl or C please Programming and Computer Science ‧ invalid@example.com (berkeman)
4 天前 [Perl] How to open multiple files and print different content Programming and Computer Science ‧ invalid@example.com (arcTomato)
4 天前 Outdoor project - adding stability by filling a column Mechanical Engineering ‧ invalid@example.com (RB2314)
4 天前 Invariance of a system under symmetry operations Quantum Physics ‧ invalid@example.com (sophiatev)
4 天前 Virtual Particles are not Dark Matter? Quantum Physics ‧ invalid@example.com (HexHammer)
4 天前 Virtual Particles is not Dark Matter? Quantum Physics ‧ invalid@example.com (HexHammer)
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4 天前 Motorbike central stand Mechanical Engineering ‧ invalid@example.com (Alec98)
4 天前 looking for a youtube video General Discussion ‧ invalid@example.com (david2)
4 天前 Multivariable Calculus, Line Integral Calculus and Beyond Homework Help ‧ invalid@example.com (tompenny)
4 天前 Lorentz violation, multiple preferred frames, vacuum energy Quantum Physics ‧ invalid@example.com (asimov42)
4 天前 Velocity of bullet fired from a gun Introductory Physics Homework Help ‧ invalid@example.com (jamiebean)
4 天前 "won't" does not look logically formed Art, Music, History, and Linguistics ‧ invalid@example.com (symbolipoint)
4 天前 Can our movement in time be decelerating? Special and General Relativity ‧ invalid@example.com (VarnaiKristof)
4 天前 How does a pressure distribution keep the fluid from moving? Classical Physics ‧ invalid@example.com (Adesh)
4 天前 Calculating Force and Torque for Linear motion (image provided) Introductory Physics Homework Help ‧ invalid@example.com (Cadormare)
4 天前 Do LEDs flicker? Electrical Engineering ‧ invalid@example.com (etotheipi)
4 天前 final velocity=initial velocity + acceleration x time Introductory Physics Homework Help ‧ invalid@example.com (jamiebean)
4 天前 Struggling with one step to show quantum equality Quantum Physics ‧ invalid@example.com (troglodyte)
4 天前 velocity of bullet from a gun Introductory Physics Homework Help ‧ invalid@example.com (jamiebean)
4 天前 velocity Introductory Physics Homework Help ‧ invalid@example.com (jamiebean)
4 天前 LG 8x thinq Computing and Technology ‧ invalid@example.com (MathematicalPhysicist)
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4 天前 When is weak interaction a force? High Energy, Nuclear, Particle Physics ‧ invalid@example.com (snorkack)
4 天前 How does corrosion occur at the least oxygenated areas? Chemistry ‧ invalid@example.com (Arceus74)
4 天前 Tricky Integral Calculus ‧ invalid@example.com (QwertyPoiuyt)
4 天前 Decent into a rotating black hole, do you hit the ring singularity? Special and General Relativity ‧ invalid@example.com (MikeeMiracle)

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