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- 12:01, 23 August 2018 Ferromagnetism (hist | edit) [1,881 bytes] Sdr (talk | contribs) (Created page with "category:Radioactivity '''Question:''' Can a glass pie pan (Corningware) become radioactive and emit dangerous radiation? '''Answer:''' Thankfully, no, it is not poss...")
- 11:58, 23 August 2018 Bakeware radioactivity (hist | edit) [736 bytes] Sdr (talk | contribs) (Created page with "category:Radioactivity '''Question:''' '''Answer:''' In the Standard Big Bang theory, matter does not "explode into a non-existent space". Indeed, matter doesn't expl...")
- 19:50, 10 August 2017 Origin of Space (hist | edit) [4,497 bytes] Sdr (talk | contribs) (Created page with "category:Big Bang category:General Relativity category:Cosmology '''Question:''' How does something explode into a non existent space? It would seem to me that w...")
- 19:04, 10 August 2017 Color Mixing (hist | edit) [2,576 bytes] Sdr (talk | contribs) (Created page with "Why is it that colours of the visible spectrum (e.g. orange) can be "faked" by mixing other colours (e.g. red and yellow) ? The retinas in your eyes contain three types of co...")
- 11:05, 8 March 2016 Virtual Photons (hist | edit) [3,878 bytes] Sdr (talk | contribs) (Created page with "category:Particles category:Electricity and magnetism This is truly hard to visualize from a classical/semiclassical point of view. Having said that though, let me tr...")
- 10:51, 8 March 2016 Electron Magnetic Moment (hist | edit) [1,501 bytes] Sdr (talk | contribs) (Created page with "'''Question:''' As I understand it magnetic fields arise from moving charges. This I understand and even know how to calculate using laws like Biot-Savart. My question doesn'...")
- 11:58, 19 November 2015 Folding space (hist | edit) [2,568 bytes] Sdr (talk | contribs) (Created page with "category:general relativity '''Question:''' If one could fold space in order to travel vast distances relatively fast, how far could one travel, and in what time frame?...")
- 19:02, 24 July 2015 Seebeck effect (hist | edit) [5,471 bytes] Sdr (talk | contribs) (Created page with "'''Question:''' We are researching [thermoelectric generation|http://en.wikipedia.org/wiki/Thermoelectric_effect#mediaviewer/File:Thermoelectric_Generator_Diagram.svg] (Seebe...")
- 18:44, 24 July 2015 Event horizon pileup (hist | edit) [4,612 bytes] Sdr (talk | contribs) (Created page with "category:black holes category:gravity category:general relativity '''Question:''' I understand that because of time dilation that we could never see something ac...")
- 21:36, 18 May 2015 Einstein's equation and time travel (hist | edit) [4,057 bytes] Sdr (talk | contribs) (Created page with "category:General relativity category:Time '''Question:''' How is Einstein's equation (Gμν = 8πG Tμν) actually applied? And how does it support the theory of tim...")
- 11:52, 15 May 2015 Doppler shift from moving thick medium (hist | edit) [963 bytes] Sdr (talk | contribs) (Created page with " A light source inside a thick medium (low speed of light) is moving at a speed v towards a receiver outside in free space. What is the frequency shift of the light seen by a...")
- 13:19, 23 March 2015 Gravitational quantum tunneling (hist | edit) [3,834 bytes] Sdr (talk | contribs) (Created page with "category:Gravity category:Black holes category:Particles category:Quantum mechanics '''Question:''' Hello! I wanted to ask a question in the realm of Quantum...")
- 11:58, 23 March 2015 Big bang black hole (hist | edit) [4,109 bytes] Sdr (talk | contribs) (Created page with "category:Cosmology category:Gravity category:General relativity category:Big bang Question: Consider our universe at the moment of the Big Bang, or perhaps a...")
- 15:19, 5 February 2015 Time dilation (hist | edit) [2,217 bytes] Sdr (talk | contribs) (Created page with "category:special relativity category:general relativity '''When we observe time dilation, such as on the Space Shuttle or GPS satellites, how can we be sure time is a...")
- 13:14, 5 February 2015 Space race (hist | edit) [6,900 bytes] Sdr (talk | contribs) (Created page with "'''The History of the Space Race''' Elementary-school students studying the space race asked this set of questions: '''How long did it take to build the Apollo rockets?'''...")
- 17:23, 3 October 2014 Pressure and gravity (hist | edit) [3,956 bytes] Sdr (talk | contribs) (Created page with " '''Answer:''' This question addresses many different concepts in physics, ranging from microscopic to macroscopic interactions. Trying to understand physical interaction at...")
- 16:55, 3 October 2014 Blue light and sleep deprivation (hist | edit) [3,435 bytes] Sdr (talk | contribs) (Created page with "'''Question:''' Studies have shown that artificial light in the evenings and at night suppresses our melatonin production which disrupts circadian rhythms while asleep. The b...") originally created as "Natural light vs. filtered"
- 21:43, 21 August 2014 Relativity of simultaneity (hist | edit) [3,028 bytes] Sdr (talk | contribs) (Created page with "'''Question:''' Two people are on a high speed, constant velocity train on opposite ends. One person is standing on the platform. The two people aim a laser beam at the cen...")
- 14:27, 14 July 2014 Infrared blocking filters (hist | edit) [1,457 bytes] Sdr (talk | contribs) (Created page with "category:photography '''Q: What are some common naturally occurring materials that absorb infrared sunlight radiation from 1.1-2.5 microns?''' Research into infrared-abs...")
- 16:42, 20 May 2014 Dangerous asteroids (hist | edit) [1,030 bytes] Sdr (talk | contribs) (Created page with "category:solar system '''Q: How do NASA scientists find dangerous asteroids?''' NASA has funded a number of searches to find dangerous near-earth asteroids. The basic id...")
- 21:27, 14 May 2014 Rotation of Venus (hist | edit) [1,687 bytes] Sdr (talk | contribs) (Created page with "Q: Why does Venus rotate clockwise when viewed from the North, while the other planets rotate counterclockwise? There are several theories about Venus' rotation, but no scien...")
- 12:12, 7 May 2014 New frontiers in particle physics (hist | edit) [1,592 bytes] Sdr (talk | contribs) (Created page with "category:particle physics Q: Now that the Higgs boson has been found, what are the next challenges for particle physicists? (1) One challenge is to complete our knowledg...")
- 12:06, 7 May 2014 Plasma (hist | edit) [1,779 bytes] Sdr (talk | contribs) (Created page with "category:Plasma '''Q: What is plasma?''' A plasma is a gas that is so hot that the constituent atoms or molecules are ionized. Because the gas is now composed of charges...")
- 11:57, 7 May 2014 Computational chemistry (hist | edit) [698 bytes] Sdr (talk | contribs) (Created page with "Computational approaches to chemistry can predict the course of chemical reactions in many cases. The feasibility and accuracy of such calculations depends strongly on how man...")
- 11:47, 7 May 2014 Van der Waals forces (hist | edit) [1,833 bytes] Sdr (talk | contribs) (Created page with "Q: What are van der Waals forces? The simplest model of a gas is the "ideal gas" model, in which the atoms or molecules that make up the gas do not interact with one another....")
- 18:53, 4 May 2014 What is gravity? (hist | edit) [4,846 bytes] Sdr (talk | contribs) (Created page with "category:General Relativity category:gravity Q: What is gravity? Thanks for asking such a great question! You were right to suspect that your introductory (or perhap...")
- 11:30, 2 May 2014 Dark Energy (hist | edit) [1,261 bytes] Sdr (talk | contribs) (Redirected page to Pagename)
- 16:58, 1 May 2014 Number of extrasolar planets (hist | edit) [812 bytes] Sdr (talk | contribs) (Created page with "category:extrasolar planets Q: How many planets have been found outside of the solar system? Thankfully there are people whose job it is to keep track of this number! Je...")
- 16:50, 1 May 2014 Life on other planets (hist | edit) [5,945 bytes] Sdr (talk | contribs) (Created page with "Q: What's the percentage of habitable planets in the universe? Q: What's the current estimate on how may planets have life? The astronomical framework for answering both of t...")
- 16:34, 1 May 2014 Astronomy vs. Cosmology (hist | edit) [656 bytes] Sdr (talk | contribs) (Created page with "Q: What's the difference between cosmology and astronomy? A: Astronomy is the study of everything in the universe. Astronomy includes determining the nature of things on a s...")
- 16:30, 1 May 2014 Gravitational Bending of Light (hist | edit) [2,808 bytes] Sdr (talk | contribs) (Created page with "Q: How much does gravity affect light? How does this relate to black holes? A: The way gravity affects the motion of objects --- whether planets, falling apples, or particle...")
- 15:11, 24 April 2014 What is a Y dwarf? (hist | edit) [1,450 bytes] Sdr (talk | contribs) (Created page with "For over a century, astronomers have used a system of stellar classification that described most stars as one of seven types depending on their temperature. The types were O, ...")
- 12:20, 23 April 2014 What is a neutrino? (hist | edit) [1,993 bytes] Sdr (talk | contribs) (Basic information on neutrinos. More detailed questions may emerge later.)
- 22:20, 22 April 2014 Color (hist | edit) [505 bytes] Sdr (talk | contribs) (Created page with "In 2012, Alan Alda challenged scientists to answer "What is a flame?" in terms 11-year-olds could understand. Check out the winning video [http://www.centerforcommunicatingsc...")
- 15:26, 22 April 2014 Ask A Physicist (hist | edit) [5,824 bytes] MediaWiki default (talk) originally created as "Main Page"