An explanation is a set of statements usually constructed to describe a set of facts which clarifies the causes, context, and consequences of those facts. This description may establish rules or laws, and may clarify the existing rules or laws in relation to any objects, or phenomena examined.Explanation, in philosophy, is a set of statements that makes intelligible the existence or occurrence of an object, event, or state of affairs. Among the most common forms of explanation are causal explanation; deductive-nomological explanation, which involves subsuming the explanandum under a generalization from which it may be derived in a deductive argument (e.g., “All gases expand when heated; this gas was heated; therefore, this gas expanded”); and statistical explanation, which involves subsuming the explanandum under a generalization that gives it inductive support (e.g., “Most people who use tobacco contract cancer; this person used tobacco; therefore, this person contracted cancer”). Explanations of human behaviour typically appeal to the subject’s beliefs and desires, as well as other facts about him, and proceed on the assumption that the behaviour in question is rational (at least to a minimum degree). Thus an explanation of why the subject removed his coat might cite the fact that the subject felt hot, that the subject desired to feel cooler, and that the subject believed that he would feel cooler if he took off his coat.
x' =-5x-y
y' =4x-y
I got
x=ae^-3t+bte^-3t
y=-2bte^-3t+2ae^-3t+be^-3t
a=0 b=0
The answer is
x=e^(-3t+3)-te^(-3+3)
y=-e^(-3+t)+2te^(-3+3)
I don't understand where the +3 comes from
Homework Statement
When a 45-kg person steps on a scale in an elevator, the scale reads a steady 480 N. Which of the following statements must be true? There could be more than one correct choice.
a) The elevator is accelerating upward at a constant rate
b) The elevator is moving downward at a...
Let f be a function on [0,major infinity] such that for each point in its graph,(x,y)=(y*y,y).At how many points must each point in f have a limit...?I'm not clear what the question is aiming...
Does the (assumption of) ubiquitousness of EM fields explain single particle interference well/better?
Below is a rough logic, however it maybe need modifications.
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PO43-
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Okay so first I would like someone to add detail to my descriptions of different types of light microscopy. Here's what I know:
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Underground magma ocean could explain Io's 'misplaced' volcanoes
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Hi, I was just wondering if the following can be viewed as an explanation for randomness in quantum events. My knowledge of quantum physics is not all that good. I've got a bit of philosophical bent, which is the source of my interest. Anyways...
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Hello everyone,
I am not sure about this issue and this is the reason why I am asking this question. I can write many sentences on this topic, but I will try to make my point as short is possible.
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Since I am a beginner in particle physics I was wondering if anyone could explain to me the concepts of Quantum Chromo Dynamics rather than saying it is the study of the colour force.
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Homework Statement
Hi all, I posted the image of the solution here.
My questions concerns the evaluation of the Residue at z=i.
Homework Equations
None needed, all giving in the question -- simple algebraic mistake made is likely to be the problem here.
The Attempt at a Solution
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We...
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I buy a packet of 28 biscuits with intention of eating two biscuits every lunch time (including weekends). However, sometimes I get greedy and eat an extra biscuit at lunch time (I always eat 2 or 3 biscuits each day). If I DONT eat any extra I would end up eating the last two biscuits on say a...
I have always thought that all of "Classical Mechanics" can be explained with Newton's Laws and a few force equations (e.g., gravitational and Coulomb). In particular, the concepts of energy and torque are convenient but not necessary.
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Consider the following:
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From a conceptual point of view, how is it that Quantum Electrodynamics explains the interaction between two charged particles, (let's say two electrons)? I've heard people say that the electrons exchange photons, but how is it that an electron would know when to send off a photon and that it...
While I have to admit the question in its summarized version seems to be not very well defined (and naive, of an easy answer), so that I desire to at least make it sound less stupid. Or at least I hope. After reading all of this it might sound even worse though (no promises).I like reading about...
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Ok so officially a matrix is a rectangular array of numbers, symbols, etc arranged in rows and columns that is treated in certain prescribed ways.
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I recently come across with an amazing equation of Theory of Everything; I wonder if TOE has been formulated (?) I found this equation on a website, check it out http://www.preposterousuniverse.com/blog/2013/01/04/the-world-of-everyday-experience-in-one-equation/. While seeing briefly this...
http://www.quora.com/How-can-sound-waves-alter-the-flow-of-water
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I posted a thread here about Ed Leedskalnin's discovery of an electromagnet which works after the power has been cut off. The forum deleted it and gave the reason "crackpot video". The video I linked simply showed the discovery that I mentioned. It was hardly a "crackpot video". In fact, as I...
I've been searching around trying to understand them. About to take calculus and I want to be prepared. Could someone explain what they are and give a few typical limit problems and solve them
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I am trying to explain the convection heat transfer and the mass transfer related (buoyancy of the heated part of the gas) using only kinetic theory of gases , I mean using only collisions between molecules of the gas. The environment is the usual one : a hot wall in contact with a gas...
ok.
this may sound stupid,
first of all i asked this question because i have a doubt that "if a photon can see things around it will it be able to see its own reflection if it aproaches towards a mirror?"
so i played a video of light being reflected in a mirror in slow motion and paused the...
Homework Statement
I also need help on a problem. but FIRST, can someone explain to me how radial acceleration relates to gravity and how gravity can be split up into tangential and radial accelerations and how that can be compared to radial acceleration ? I know the basic stuff..like if a...
I have seen this news earlier that the physicist accidentally discover a warp drive an idea of traveling as fast of speed of light? Is this possible? How it will work?
I'm not sure where to post this, but I wanted to show this just because of the incredible nature of the phenomenon.
It's just the dust from a slow running wet grindstone. I assume just vibration, but the more carefully you look the more unbelievable it becomes.
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Rhetorical Question: I have never understood why light (primarily a form of information or data) is often assumed to have velocity.
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1. Explain, using the Sauerbrey equation, how the change in the resonance frequency of a quartz crystal can be related to an analyte concentration
2. Sauerbrey equation:
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At this stage of my education there's a lot of things that we're just supposed to accept and roll with it. Last year electricity was pretty much Ohm's law and Kirchoff's rules, now I've done electric fields so I'd like to understand it in more detail. Let's consider a simple circuit with a...
I'm looking for physics books that explain beginner concepts, their history, and how they came to be thoroughly. I thought of Newton's mathematica but I heard it's super complicated and the notations are difficult to understand. I was recommended "On the Shoulders of the Giants" by Stephen...
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Hi everyone,
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I'm currently teaching a gen ed course called Relativity for Poets. This is the first semester I've taught it, and it's been a ton of fun so far. If anyone is curious, http://www.lightandmatter.com/area3phys120.html is the class's web page with links to the syllabus and lecture notes. The...
So I tried googling it but unfortunately i haven't found anything, so I though i'll take my quarries here.
I would like to know, how scientists have tried to explain how quantum entanglement works.
Thanks for the answers. :)
Hello everyone. At first, I appreciate your click this page.
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in page415,
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