What are the physics behind different baseball pitches? |
- What are the physics behind different baseball pitches?
- If I set my water temperature to 50 deg celsius and have a shower why does the bathroom fill with steam, as this is half of the boiling point?
- Why isn't a Bose-Einstein condensate get talked about much in lower level science classes even though it's considered a "state of matter"Or is this different than being a solid, liquid, gas, or plasma?
- Do you get lighter the further underground that you go?
- Modeling a wave(water)?
- In the 'Light Echo' images of the V838 Monocerotis star why are the leading edges blue?
- Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science
- Do gravitational waves lose energy?
- What specifically is stopping people from finding an analytical solution to the Navier-Stokes equations under turbulent conditions?
- Can every possible shape (drawn by a graph in a coordinate system) be represented by an equation? If so, how can a shape be turned into an equation?
- I read that since gravity is only attractive, the graviton would have to have a spin of 2. What does odd/even spin have to do with attractive/repulsive forces?
- Do we have any idea of what selective pressures might have acted upon the evolution of spermalege and traumatic copulation in bedbugs?
- How fast do I need to drive to keep watching the sunset?
- What is Angular Momentum how does it work and what the Laws Behind it?
- In movies "going into shock" after an injury is always bad, but isn't it one of the body's defense mechanisms? How could it help?
- Is it possible to have nonzero acceleration and zero velocity in this example?
- Which temperature does an electron beam have?
- How does stored body fat get metabolized by the body?
- How much do we really understand about magnetism?
- Why didn't humans evolve to like vegetables and not like very sugary foods?
- Why do detergents dissolve oils, but not greases? What's special about degreaser that does?
| What are the physics behind different baseball pitches? Posted: 28 Jun 2016 07:22 PM PDT What makes a sinker sink? a curveball curve? a fastball straight? [link] [comments]  |
| Posted: 28 Jun 2016 11:42 PM PDT |
| Posted: 29 Jun 2016 02:27 AM PDT |
| Do you get lighter the further underground that you go? Posted: 29 Jun 2016 06:46 AM PDT I figure you'd get lighter the deeper you go underground since you weight more on bigger planets and less on smaller planets and the deeper underground you go the less mass is below you. Additionally there will be more and more mass above you which is going to be pulling you towards it as well. So if the center of the earth were hollow wouldn't you be weightless if you were there? [link] [comments]  |
| Posted: 29 Jun 2016 06:52 AM PDT Hey, first time poster here. I was wondering if there's an equation that finds the size of a wave when an object(I assume the equation would be based on the surface area that impacts the water, the weight of the object, and the speed) is dropped into a body of water? I also wonder if, in a closed environment, would a wave ever stop? I would think so due to friction with the air and the water, is there an equation to model this? Thanks in advance for any answers :) [link] [comments]  |
| In the 'Light Echo' images of the V838 Monocerotis star why are the leading edges blue? Posted: 29 Jun 2016 02:54 AM PDT In this image, the light pulse seems to have blue light reach the outer extremities first, and the red light seems to trail behind. What causes this? [link] [comments]  |
| Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science Posted: 29 Jun 2016 08:05 AM PDT Welcome to our weekly feature, Ask Anything Wednesday - this week we are focusing on Physics, Astronomy, Earth and Planetary Science Do you have a question within these topics you weren't sure was worth submitting? Is something a bit too speculative for a typical /r/AskScience post? No question is too big or small for AAW. In this thread you can ask any science-related question! Things like: "What would happen if...", "How will the future...", "If all the rules for 'X' were different...", "Why does my...". Asking Questions: Please post your question as a top-level response to this, and our team of panellists will be here to answer and discuss your questions. The other topic areas will appear in future Ask Anything Wednesdays, so if you have other questions not covered by this weeks theme please either hold on to it until those topics come around, or go and post over in our sister subreddit /r/AskScienceDiscussion , where every day is Ask Anything Wednesday! Off-theme questions in this post will be removed to try and keep the thread a manageable size for both our readers and panellists. Answering Questions: Please only answer a posted question if you are an expert in the field. The full guidelines for posting responses in AskScience can be found here. In short, this is a moderated subreddit, and responses which do not meet our quality guidelines will be removed. Remember, peer reviewed sources are always appreciated, and anecdotes are absolutely not appropriate. In general if your answer begins with 'I think', or 'I've heard', then it's not suitable for /r/AskScience. If you would like to become a member of the AskScience panel, please refer to the information provided here. Past AskAnythingWednesday posts can be found here. Ask away! [link] [comments]  |
| Do gravitational waves lose energy? Posted: 29 Jun 2016 01:09 AM PDT If a gravitational waves change spacetime on there way does this acquire energy and does it therefore vanish after some time? [link] [comments]  |
| Posted: 28 Jun 2016 03:01 PM PDT |
| Posted: 28 Jun 2016 11:30 AM PDT |
| Posted: 28 Jun 2016 11:14 AM PDT I understand that the photon has a spin of 1 and is therefore capable of being both attractive and repulsive. But I don't understand how this works. I read somewhere that for even spin, q1q2 > 0 is attractive and q1q2 < 0 is repulsive, while the opposite is true for odd spin. But I honestly have no idea what that means, or why it is that way. I'm an amateur so please dumb it down as much as you can. Thanks for the help. [link] [comments]  |
| Posted: 29 Jun 2016 03:10 AM PDT In particular, I'm puzzled by the ability of the spermalege to filter out spermatozoa and introducing them into the testes of a male, in the case of homosexual traumatic copulation, as has been observed in Xylocoris maculipennis. Yes, it is a rather fascinating biological mechanism in a garish kind of way, it implies that a specific bedbugs testes may contain some sperm from another one ... call it self-cuckolding if you want ... But I am curious and can't help but wonder: How could this specific biological mechanism which allows less certainty of ones paternity be selected for? [link] [comments]  |
| How fast do I need to drive to keep watching the sunset? Posted: 28 Jun 2016 11:16 PM PDT Say just for an example I'm driving west along the 41st parallel in the USA. The sun just begins to set on the horizon and I want to keep it right where it is, visually. How fast would I need to travel west to keep the sun right where it is? [link] [comments]  |
| What is Angular Momentum how does it work and what the Laws Behind it? Posted: 28 Jun 2016 04:50 PM PDT Also if you have any sporting examples to go with your answer that would be much appreciated. [link] [comments]  |
| Posted: 28 Jun 2016 09:41 AM PDT |
| Is it possible to have nonzero acceleration and zero velocity in this example? Posted: 28 Jun 2016 02:13 PM PDT My teacher explained that it is possible to have a non zero acceleration while having zero velocity. I agree. The classic example of throwing a ball upward shows this. But my teacher's example was this. "Imagine you're in your car and you are stopped (velocity=acceleration=0). Now imagine you press the pedal and to floor and you start accelerating. Your acceleration is non zero but your velocity is zero because you are starting from rest." I asked him to repeat because I did not understand him. Again he said the same thing. Can someone clarify this please?? My intuition tells me that my teacher is mistaken. [link] [comments]  |
| Which temperature does an electron beam have? Posted: 28 Jun 2016 11:43 PM PDT I understand that the temperature is determined by the stored energy of the elements / molecules. Since an electron beam is made of accelerated electrons with a speed of two third light speed, and the kinetic energy of the electrons can be used for welding (EB-welding) i would like to know what is the (theoretical?) temperature of the beam. [link] [comments]  |
| How does stored body fat get metabolized by the body? Posted: 28 Jun 2016 09:37 AM PDT When you run low on food energy, your body starts to burn excess fat to supply it with the necessary energy, right? What I'd like to know is how this process happens. You have belly fat... does it get absorbed into the bloodstream? Does it get transferred to the stomach? How does all this happen? Forgive my basic interpretations of the human body and its functions, but I just always thought it was a weird, rather unexplained topic. [link] [comments]  |
| How much do we really understand about magnetism? Posted: 28 Jun 2016 09:59 AM PDT I took an electronic properties of materials course last semester, and at the end we spent a week talking about magnetic materials. From what I gathered, we have a fairly decent idea of how and why electronics work, but magnetism is much less understood. Is this accurate? [link] [comments]  |
| Why didn't humans evolve to like vegetables and not like very sugary foods? Posted: 28 Jun 2016 11:00 AM PDT If vegetables such as spinach are really good for you, why didn't humans evolve to enjoy those instead of very sugary foods like ice cream and cookies? I get that sugars were good for us because we could build fat, but vegetables contain much healthier components. [link] [comments]  |
| Why do detergents dissolve oils, but not greases? What's special about degreaser that does? Posted: 28 Jun 2016 09:50 AM PDT |
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