How do psychologists distinguish between a patient who suffers from Body Dysmorphic Disorder and someone who is simply depressed from being unattractive? |
- How do psychologists distinguish between a patient who suffers from Body Dysmorphic Disorder and someone who is simply depressed from being unattractive?
- If a spider builds its web in a bad spot, will it be smart enough to give up after a day or two and move elsewhere, or will it just starve to death because it can't realize it made a bad decision?
- Is there any possibility that meteorites/asteroids have some new material? Like a new metal that doesn't exist in earth?
- What determines Battery charge efficiency?
- What makes two different nuclei stay together during a nuclear fusion reaction?
- Why do our hands and other extremities shake?
- Why does the 1st Ionisation Energy NOT decrease between Group 1 and Group 2 elements?
- How to reverse desertification?
- Why do things turn black when they burn?
- Does tectonic movement destroy ancient asteroid craters?
- Why can certain blood transmittable things (West Nile, Malaria, Zika, etc.) be transmitted through mosquito bites, but other (AIDS, Hepatitis, etc.) cannot?
- Is a blank 15 minute MP3 the same size as a 15 minute MP3 of music?
- Do we as humans perceive fear differently when we sleep?
- How do you increase energy of photon emitted from magnetic resonance relaxation in MRI?
- Do stars appear smaller over time?
- Why do balloons make such a loud noise when they pop?
- Why does vacuum-energy exist? How can nothing have some energy?
- Why can we use the earth as an electrical ground?
- How do chemical reactions work on the quantum level?
- How do animals like moray eels or clownfish change their sex?
- Why is Mars sky opposite of Earth (red during day, blue at sunset/sunrise) ?
- Does the body produce adrenaline during surgeries where it is cut open? Why or why not?
- What is stopping local communities from setting up their own internet services?
- What is the liquid inside reusable plastic ice cubes?
| Posted: 27 Nov 2017 02:05 PM PST |
| Posted: 27 Nov 2017 07:28 PM PST |
| Posted: 28 Nov 2017 02:59 AM PST |
| What determines Battery charge efficiency? Posted: 28 Nov 2017 01:57 AM PST Hi Redditors, This is my first post here. I've been trying to understand batteries and have found most sites I found either had explanations that were too shallow or too long and specific. I'm wondering if someone can point me to the right direction? The topics I have of interest are: 1) Battery charging - Batteries charged only up to 80-90% as opposed to 100% increase in usable life and total charge cycle capacity? Why? - What determines the maximum Jolts per second a battery can discharge or be charged by? What is the limit? Does it just explode if you give it too much juice? - There seems to be two-fold decay in the charging efficiency. First as you increase the jolts per second you are charging the battery with and second as the battery nears fuller capacity you also lose charge efficiency. I.e. more electricity "warms the air" as charging speed and battery capacity charged increase. Specifics on these factors? Are there more? 2) Battery chargers - There is also an inefficiency (electricity lost) in charging electronics. Is it better to charge a battery from another battery? Or is it the same as grid to battery? What is the inefficiency in charging caused from? - What limits the charging speed? Is it the charger or the battery receiver or both? 3) Do the answers above depend on the battery type you are using or do the rules hold true for all battery types? Discuss! [link] [comments]  |
| What makes two different nuclei stay together during a nuclear fusion reaction? Posted: 28 Nov 2017 04:21 AM PST |
| Why do our hands and other extremities shake? Posted: 27 Nov 2017 05:23 PM PST |
| Why does the 1st Ionisation Energy NOT decrease between Group 1 and Group 2 elements? Posted: 28 Nov 2017 07:03 AM PST So I've read that, between the Group 5 and Group 6 elements of the same period, the first ionisation energy decreases because in group 6 the electron is removed from a full orbital, so the mutual repulsion of the two electrons in the orbital makes it easier for the electron to be removed. However, surely this scenario is the same as for group 2 elements, where 2 electrons share the s-orbital? So my question is, why is there a drop in first ionisation energy between group 5 and group 6 elements of the same period, but NOT between group 1 and group 2 elements? [link] [comments]  |
| How to reverse desertification? Posted: 28 Nov 2017 04:42 AM PST To what extent have our grasslands deteriorated and how can the process be reversed? More specifically what are your thoughts on this Ted Talk? [link] [comments]  |
| Why do things turn black when they burn? Posted: 28 Nov 2017 12:19 AM PST |
| Does tectonic movement destroy ancient asteroid craters? Posted: 28 Nov 2017 02:31 AM PST This might be a silly question with an obvious answer, but hear me out. Plate tectonics are responsible for shaping and moving the crust of our earth, correct? If they change the shape of our earth so much, how can we know which craters cause certain extinctions? For example the Chicxulub Crater, which supposedly caused a mass extinction, might not actually be as old as we assume it is. Wouldn't the moving plates, after millions of years, change the topography so much as to make craters unrecognizable? How do we know the Chicxulub Crater isn't a more recent addition to earth's landscaping? Edit: fixed a fragmented sentence. PS. this isn't meant to sound precocious or knit-picky. I have very little knowledge of this subject and I'm genuinely curious. [link] [comments]  |
| Posted: 28 Nov 2017 06:15 AM PST |
| Is a blank 15 minute MP3 the same size as a 15 minute MP3 of music? Posted: 27 Nov 2017 08:43 PM PST |
| Do we as humans perceive fear differently when we sleep? Posted: 28 Nov 2017 05:49 AM PST I honestly don't know if this is the right sub but it's just a question on my mind. This is after I had a nightmare a short while about things I wouldn't be normally fearful about. [link] [comments]  |
| How do you increase energy of photon emitted from magnetic resonance relaxation in MRI? Posted: 28 Nov 2017 02:55 AM PST I wonder if there is a way to increase photon energy, because I want to use the emitted photon to something else. I have read from Hoult (2009) that 1,5 T are only enough to generate 2 x 10−7 eV. Is it by increasing the magnetic field (B), radiowaves, or both? Also is there a definite reference that state the lethal dosage of magnetic exposure to human? Thank you References: Hoult. 2009. The origins and present status of the radio wave controversy in NMR. Concepts Magn Reson Part A 2009; 34A:193-216 [link] [comments]  |
| Do stars appear smaller over time? Posted: 27 Nov 2017 08:34 PM PST Because the universe is expanding we would expect the stars to appear smaller after some time, is that what we have observed? (If not, could the red shift of light dependent on how far a star is exist because light somehow needs energy for travel or loses it in some way? I'm not a physicist so maybe this is a completely stupid idea, but the accalerated expansion idea still doesn't have a well explained cause and the biggest reason we think accalerated expansion is a thing is because of the red shift which could possibly be because of other causes.) [link] [comments]  |
| Why do balloons make such a loud noise when they pop? Posted: 28 Nov 2017 07:34 AM PST |
| Why does vacuum-energy exist? How can nothing have some energy? Posted: 28 Nov 2017 07:33 AM PST |
| Why can we use the earth as an electrical ground? Posted: 28 Nov 2017 07:25 AM PST I'm in my second year of class pledge to become an electrical engineer, and this is just something that is assumed to be true. Why can the earth just suck up electricity like that (assuming conventional current flow, that is). Will it ever not be able to? [link] [comments]  |
| How do chemical reactions work on the quantum level? Posted: 27 Nov 2017 04:28 PM PST I'm an undergrad student studying chemistry and biology where (especially in organic chemistry) we do a lot of "arrow pushing" (i.e. drawing arrows to signify where electrons travel during a chemical reaction). Earlier today I was watching a video in which Sean Carroll (physicist) goes on to explain how electrons actually form a "cloud" of probability around an atomic nucleus, where according to its wave function you can predict where you might find that electron if you went looking for it. He also stated, most importantly, that the electron is actually just a cloud of probability until you look for it, that the electron isn't anything more than a wave function until we look. What does that mean for my arrow pushing? If the electron is just a wave function does it collapse when chemical bonds are formed? What exactly goes on in this sense? [link] [comments]  |
| How do animals like moray eels or clownfish change their sex? Posted: 28 Nov 2017 06:48 AM PST |
| Why is Mars sky opposite of Earth (red during day, blue at sunset/sunrise) ? Posted: 27 Nov 2017 06:58 PM PST |
| Does the body produce adrenaline during surgeries where it is cut open? Why or why not? Posted: 28 Nov 2017 06:12 AM PST We all know that when you get into horrific accidents and get a limb severed (or something on a similar scale), the body produces a ton of adrenaline to help you numb the pain and puts your body in a fight or flight mode to ensure its survival. But in a medical surgery when you're properly sedated for (for example) an amputation where your limb is going to be severed, does your body produce adrenaline as well? Why or why not? [link] [comments]  |
| What is stopping local communities from setting up their own internet services? Posted: 28 Nov 2017 06:12 AM PST I want to give Comcast and AT&T the middle finger. Are the barriers to this the cost of infrastructure or is something required on a national scale that communities simply cannot achieve. Thanks guys! [link] [comments]  |
| What is the liquid inside reusable plastic ice cubes? Posted: 28 Nov 2017 06:04 AM PST So I got those ice cubes that are plastic and reusable, what is the liquid inside them? It can't just be water right? [link] [comments]  |
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