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.
Explain why this is no good as a definition of continuity at a point a (either by giving an example of a continuous function that does not satisfy the definition or a discontinuous one that does):
Given ε > 0 there exists a \delta > 0 such that |x – a| < \epsilon \Rightarrow |f(x) – f(a)| <...
Space time Geometry and GR, taken from lecture notes
http://www.mth.kcl.ac.uk/courses/cm334.html
http://www.mth.kcl.ac.uk/courses/cm334/Lectures0910.pdf
from pages 3 and 4
Newton's universal law of gravity is getting modified.
it says using the result, from where this result...
I've read about the class equation on Herstein's abstract algebra but haven't understood it well. Would someone here explain the class equation to me and give a short proof for it and then tell me where it can be used?
Can anyone please explain schuler cycle, please don not start explaining with same old pendulum with the length of radius of Earth stuff.
why is it required ?
what is that all about ?
Homework Statement
Explain why it may be difficult to precisely date ocean crust aged between 85 and 125 million years old using magnetic anomalies on the sea floor. (2 marks)
The Attempt at a Solution
At first I thought about how long it takes for the Earth's magnetic field to...
Homework Statement
I already have the solutions, just don't understand one step
Let (n_k)_{k=1}^{\infty} be a sequence of integers
n_1 < n_2 < n_3 < ...
Then n_k \geq k \forall k = 1,2, ...
In particular n_k \to \infty when k \to \infty
Prove this is true
2. The...
Please Explain this?!
hey, ok so i was going tthrough my textbook and following some examples hwne i cam up to this:
Force of Thrust = Ft/ delta T
= 6N / 3.48s
=1.7 N
but it doesn't say what the equation means. can someone...
Why is a magnetic field "a field-of-force in space" while a gravitiational field is "not a field in space, but a curvature of space itself"? Why can't we describe and explain EM repulsion and attraction the way we explain gravitational attraction? Why don't we say that the presence of a charge...
My idea of explaining time dilation to others (average people) was : see a light wave as the time, person A standing still sees the time (light wave) passing, person B moving sees lesser time passing when going in the direction of the light wave (while "looking" to the light wave) because he is...
So, Shankar in his famous book started to use the propagator a bunch of times in his Simple Problems in One Dimension chapter, and I have been confused to what it is and does.
I'm asking this integral equation (I'm not sure if it's an integral equation or not by it's a problem in my ODE book and because it has an integral in it I called it that way). anyways, this is the problem:
y=\int^{x}_{1}ty(t)dt
I differentiated y with respect to x and I turned that equation...
Finding out about the past (archaeology) always involves digging down?
Does this mean that the planet we live on is actually expanding?
If you think about the programs on the TV!
E.G. Time team, they are always digging down to find our (the planets) past.
Now considering the above,
Can we...
The other day, as I was struggling through my quantum mechanics text, I realized that the only physical laws presented in the text were the four postulates of QM, the last of which is Schrodinger's equation. These are presented around page 150. The first 150 pages establish the background needed...
So I have some unresolved issues with relativity in general (as in both SR and GR) which I would like to bring up and then discuss:
First, Cosmic Limit: It is logical to find that c = maximum velocity, but what is the maximum possible acceleration? No form of non asymptotic acceleration...
This might look a bit stupid but I have just started beams and I can't understand a part in this example it is to do with finding a general equation of the height at any given point on a tapered cantilever beam can someone please explain
Homework Statement
I was helping my sister with her high school geometry homework, and she had to graph the absolute value function y=lx+6l using two linear equations. The way i did it was different than the way her book showed. Basically, I told her that when removing the absolute value you...
A double slit experiment which has two stages: first the experimenter marks through which slit each photon went, without disturbing their movement, and demonstrates that the interference pattern is destroyed. This stage shows that it is the existence of the "which-path" information which causes...
Dear Marcus:
Many thanks for your very informative messages.
Please write one more on a simple LAYMAN's question.
How do we know FOR SURE what is going on NOW in the far distant places of the Universe as the light from there had originated long AGO?
Why there are no chances that NOW...
http://books.google.com/books?id=Ey94E3sOMA0C&lpg=PP1&pg=PA190#v=onepage&q&f=false"
Aristotle's Logic
I want to know whether I have understood this right.
We shouldn't be saying , "All Greeks are men,all greeks are white,therefore some men are white".
So we should be saying "there are...
Indicate why we can impose only n initial conditions on a solution of nth order linear differential equation.
A) Given the equation y'' + py'+ qy = 0
explain why the value of y''(a) is determined by the values of y(a) and y'(a).
B) Prove that the equation y'' - 2y' -5y =0
has the...
Homework Statement
Homework Equations
V=IR, Nodal Analysis
The Attempt at a Solution
1 and 2 in the diagram are the nodal equations. Considering that the left node is V1 and that the right node is V2. I don't know how to get from the nodal equations to step 3. I know that you go...
Homework Statement
Homework Equations
V=IR, Nodal Analysis
The Attempt at a Solution
1 and 2 in the diagram are the nodal equations. Considering that the left node is V1 and that the right node is V2. I don't know how to get from the nodal equations to step 3. I know that you go from step...
Let's say I have an equation E=iE0cos(kz-wt)-jE0cos(kz-wt), how do I look at this and know, this is linearly polarized? or what if it changes and the kz is negative? or its a sin function with with (wt-kz-pi/4) in it. I just don't understand what this equation is supposed to be telling me and...
I just pulled a paragraph that's giving me a headache atm.
http://img31.imageshack.us/img31/8697/unledwjt.png
The LOP (Figure 2.1) they refer to is
[PLAIN][PLAIN]http://img600.imageshack.us/img600/9787/unledylv.png
How on Earth did they show that this feasible set is bounded? Yes I...
CAN SOMEONE PLEASE explain the "this." keyword in java to me?!
"the this keyword can be used to refer to the calling object or used inside one constructor to invoke another in its own class.
I understand how it invokes another constructor. But i do not understand why i keep seeing this code...
Hello all,
New member here, I am in need of someone familiar with Physics to explain something to me.
Its 9-11 conspiracy related so apologies to anyone who is sick of that subject but a someone has posted a stack of formula in response to a comment of mine and I would like someone who...
can i use cvt to act like the resistance load in the generator?
to analyse if the output power is increase or decrease...
its about my degree project...
The question was, Explain instantaneous velocity.
My answer:
Limit as delta(t) approaches zero of average velocity is inst. velocity. Or as delta(t) approaches zero, average velocity approaches inst. velocity.
inst. velocity is the slope of the tangent line at a given point...
Then I...
Homework Statement
Consider two points located at r1 and r2, separated by distance r=(r1-r2). Find a vector A from the origin to a point on the line between
r1 and r2 at distance xr from the point at r1, where x is some number
Homework Equations
The Attempt at a Solution
I have no...
Homework Statement
I have a question that states "Explain quantitatively why BLAH is true". What does "Explain quantitatively" mean?
Homework Equations
None
The Attempt at a Solution
I think it means give an outline of the argument, however the word quantity makes me think it...
Homework Statement
For drawing purposes, I'm just going to state the locations of the 2 points. Cable AB carries a tension of 12 kN. Point A=(0,0,70) m and point B=(35,-25,10) m.
Find the corresponding force on point B as a vector.
okay now this part has me confused. I'm trying to...
From the wikipedia page on his "The Structure of Scientific Revolutions"
Can somebody explain what is meant? The way I see it, it seems so obviously wrong: I don't see any reason why two opposing paradigms can't be tested by the same experiment... For example you had the Phlogiston theory...
\frac{1}{|\partial B(x,r)|}\int_{\partial B(x,r)}u(y)\,dS(y)=\frac{1}{|\partial B(0,1)|}\int_{\partial B(0,1)} u(x+rz)\,dS(z)
Why does dS(y)\to dS(z) and not dS(y)\to dS(x+rz)?
If you want more information, it comes from http://www.stanford.edu/class/math220b/handouts/laplace.pdf on page 8...
Given that the Lorentz force on a current when E=0 exists only at right angles to the current, such would not change the speed of the current, but only its direction. Also, when the current is parallel to a magnetic field line, no deflection of the current by the magnetic field occurs.
A magnet...
A sample of liquid is heated from room temperature to just below the boiling point. The overall change in temperature is 75°C. Express this temperature change in kelvins.
The book has the answer as 75K. How did they arrive at that answer? I don't think I understand the problem. I rather...
Homework Statement
Ok so my book says that the volume of a parallelepiped is:
V= |b cross c||a||cos(theta)| = |a dot (b cross c)|, where a, b, and c are vectors
I get the "|b cross c||a||cos(theta)|" part because I can see the geometry but I don't get how they get from that to |a dot...
I'm taking AP Bio and we're covering basic chemistry needed for it. I've not had chemistry yet, so I'm left wondering about the interesting stuff, like electronegativity.
Basically, what I'm interested in, is: why is H2O polar? What is it about O that makes it magnetically attract H...
I was looking in my old physics text in connection with another thread and the text said high speed electron collisions and slow speed drift of electrons with an applied electric field don't explain resistivity very well...yielding resistivities 100 times or more than observed.
For a plain...
Hi All,
I wonder if the modulation of RF waves (Amplitude Modulation, Frequency Modulation, and Phase Modulation) can be explained in terms of photons.
Thanks,
Srini
Now, from what I understand, Bohr's model of the atom is outdated and flawed. But whenever I imagine energy levels, it is the Bohr's model that comes to mind. Do electrons really orbit around the nucleus? I would assume because of classical physics, even though the electron can be on any portion...
Too few examples to explain "The principles of quantum mechanics" by dirac.
Hi!
I studied my first course of quantum physics without a technical formalism (I'm studying physics engineering).
I find some hindrances in paragraph 20.
It says (I'm translating from Italian):
After a few...
Regarding the problem of the low entropy state at the big bang, people like Penrose, Page, Carroll etc. do not think that inflation solves the problem.
I recently read and listen to Seth Lloyd and his explanations about the beginning of the universe from the point of view of entropy as...
Hi Guys,
I have a question.
Can we attempt to explain the phase change of a carrier wave in terms of photons?
For example consider GPS signal. It is BPSK modulated, in which phase change of 180 degrees happens for multiple of 1540 cycles of the carrier.
How is the phase information...
Was Super String theory (theory that attempts to unite General Relativity and the Standard Model of particle physics) specifically designed to explain singularities; ie: phenomena such as black holes and the big bang? Does all other phenomena obey, and can be explained, by either classical...
[b]1. Homework Statement [/
Using the approximation, explain why the second derivative test works
approximation=f(x0+delta x, y0+delta y)
delta x and delta y are small...
Homework Equations
f(x0+delta x,y0+delta y)
The Attempt at a Solution
ok so i know the first derivative...