How does a master key work? |
- How does a master key work?
- Why does sunburnt skin feel hot to the touch?
- When you shake up a carbonated drink, where does the pressure go once it’s ‘settled’?
- What makes people see tennis balls as either yellow or green?
- Air molecules travel at 1000 mph. Can we harness that kinetic energy?
- Do mental illnesses run in families? Will they be the same mental illness or can they vary between each offspring?
- How were the subduction zones discovered and observed?
- In my chemistry class yesterday we learned about the pathlength of gas molecules in a gas at STP. What is the pathlength of interstellar hydrogen? What about the intergalactic medium?
- What factors affect the orbit of our sun around the galaxy?
- Why do images on a monitor become negtive when viewed from a certain angle?
- How far in advance can we predict a major tectonic event?
- What kind of PRNG algorithm(s) are used by supercomputers running simulations for things like weather modeling or orbital dynamics?
- In many-worlds interpretation, when exactly branchings happen?
- Are there physical or practical limits to how much power batteries can store in a given amount of space?
- Why doesn't concentration affect the rate constant?
- How is fuel efficiency defined?
- How does a catalyst affect activation energy?
- How often do collisions in LEO happen?
- Why is majority of the world right-handed?
- Why does the United States generally have a colder climate than most of Western Europe despite being at the same lattitude, and some parts even being further south?
- Do bees have spatial memory when foraging for food?
| Posted: 22 Apr 2018 03:45 AM PDT |
| Why does sunburnt skin feel hot to the touch? Posted: 21 Apr 2018 03:42 PM PDT |
| When you shake up a carbonated drink, where does the pressure go once it’s ‘settled’? Posted: 21 Apr 2018 06:43 PM PDT |
| What makes people see tennis balls as either yellow or green? Posted: 22 Apr 2018 05:15 AM PDT I talked to a friend and we came to different conclusions as to what color a tennis ball is. How come there is a difference at all? I first assumed it was like the dress but there was only ever one photo with questionable background while pretty much everyone of us has seen a tennis ball in more than one occasion and context. [link] [comments]  |
| Air molecules travel at 1000 mph. Can we harness that kinetic energy? Posted: 22 Apr 2018 12:27 AM PDT Air molecules are travelling at around 1000 mph at room temperature. Why is it not possible to harness all that kinetic energy to produce electricity? I guess the answer is that for every molecule travelling in one direction, there is another travelling in the opposite direction. Could a structure be designed to trap more energy from molecules travelling in one particular direction? Eg nano-scale V shapes. Air molecules hitting the top of the V would have to bounce back out again, imparting a lot of energy. Molecules hitting the underside would only need a small deflection, imparting less, leading to a downward force on the V. [link] [comments]  |
| Posted: 21 Apr 2018 10:32 PM PDT |
| How were the subduction zones discovered and observed? Posted: 21 Apr 2018 05:30 PM PDT |
| Posted: 22 Apr 2018 12:09 AM PDT |
| What factors affect the orbit of our sun around the galaxy? Posted: 21 Apr 2018 03:30 PM PDT Our solar system circles the milky way, but it also "bops" up and down in relation to the plane of the (mostly flat) galaxy. Are we orbiting something massive besides the galactic center of mass? Or are we "oscillating" back and forth through a stable position, destines to come to a rest at some point in the future? Is the current consensus that this movement has some effect on our climate or the risk of impact from celestial objects, or that it is mostly meaningless? [link] [comments]  |
| Why do images on a monitor become negtive when viewed from a certain angle? Posted: 21 Apr 2018 01:05 PM PDT |
| How far in advance can we predict a major tectonic event? Posted: 21 Apr 2018 02:54 PM PDT Is it even possible to guess based off other events that have happened? [link] [comments]  |
| Posted: 21 Apr 2018 08:25 PM PDT For a specific example, what do ECMWF use in their tropical cyclone simulations? Or, amm I totally off base thinking these simulations need the speed of a PRNG? [link] [comments]  |
| In many-worlds interpretation, when exactly branchings happen? Posted: 21 Apr 2018 11:25 PM PDT According to my youtube-video-level understanding of M-W, the universe splits each time particles interact, forming ever growing tree of branches. But isn't the concept of simultaneity undefined in special relativity, making it impossible to form tree with clearly ordered branches? Also, isn't the concept of "particles interacting" just a special case of continuous wave functions interacting? So how do we define branching when every wave function interacts with every other wavefunction, to different degrees, at each moment? [link] [comments]  |
| Posted: 21 Apr 2018 07:21 PM PDT |
| Why doesn't concentration affect the rate constant? Posted: 21 Apr 2018 02:47 PM PDT From the arrhenius equation, it seems the A (or frequency factor) is partially describing the frequency of collisions. Wouldn't A increase with an increasing number of one or both of the reactants? [link] [comments]  |
| How is fuel efficiency defined? Posted: 21 Apr 2018 11:17 PM PDT Hello community, I am not a physicist by background but I like to learn. I have always been confused by the concept of fuel efficiency. How is it defined? On one side, I feel that it can be described as how many miles per gallon a vehicle can travel but then I get asked why isn't it the amount of horsepower or torque that can extracted from the fuel. I can say "Hey Mazda is pretty fuel efficient as they can use 2.0 liter engine and give you 35 mpg" but what about "hey my Mitsubishi evo X can product 800 hp from a 2.0 liter engine" . To me, they both hold fair arguments. However, I would to ask experts what fuel efficiency is? Is it defined as an equation of horsepower/torque or is it defined as an equation of distance traveled? Why? Thanks [link] [comments]  |
| How does a catalyst affect activation energy? Posted: 21 Apr 2018 08:48 AM PDT I have seen diagrams of catalysts which hold molecules in place so that they are in the correct orientation for reactions to occur but my textbook says that they provide a alternative route which lowers activation energy. Does that mean orientation is factored into activation energy or are they separate things? If so how do catalysts reduce activation energy? Does it do with the way they deform the electron shells of a molecule? [link] [comments]  |
| How often do collisions in LEO happen? Posted: 21 Apr 2018 09:05 AM PDT The humanity has been sending quite an amount of satellites, space shuttles etc. to the Earths orbit for the past ~60 years and from my understanding the LEO (Low Earth Orbit) is getting quite crowded by lost satellites, parts of shuttles and smaller debris. My question is: How often do collisions between currently operational satellites and the ISS happen and how impactful are they? As a side question, If we somehow created a device that could pull all the unwanted debris towards Earth to burn up in the atmosphere, how impactful would the emissions be on the Earth/would we even notice? [link] [comments]  |
| Why is majority of the world right-handed? Posted: 21 Apr 2018 06:28 AM PDT Just curious about this, there must be some explanation, right? [link] [comments]  |
| Posted: 21 Apr 2018 01:48 AM PDT |
| Do bees have spatial memory when foraging for food? Posted: 21 Apr 2018 01:33 AM PDT Hi all Background - ok my wife found a bumble bee looking docile in the house so she fed it some honey, the bee perked up and flew out of the house. Now we've had what we think is the same bee fly into our house 3 days in a row and each time fly to same spot in the house where she fed the bee honey - presumably to look for the honey. So my question is - do bees have memory of locations for food or is it entirely pheromone based? EDIT: i'm surprised to not see a nature flair to add to this post. [link] [comments]  |
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