A choice is the range of different things from which you can choose. The arrival at a choice may incorporate motivators and models. For example, a traveler might choose a route for a journey based on the preference of arriving at a given destination at a specified time. The preferred (and therefore chosen) route can then account for information such as the length of each of the possible routes, the amount of fuel in the vehicle, traffic conditions, etc.
Simple choices might include what to eat for dinner or what to wear on a Saturday morning – choices that have relatively low-impact on the chooser's life overall. More complex choices might involve (for example) what candidate to vote for in an election, what profession to pursue, a life partner, etc. – choices based on multiple influences and having larger ramifications.
Freedom of choice is generally cherished, whereas a severely limited or artificially restricted choice can lead to discomfort with choosing, and possibly an unsatisfactory outcome. In contrast, a choice with excessively numerous options may lead to confusion, reduced satisfaction, regret of the alternatives not taken, and indifference in an unstructured existence;
and the illusion that choosing an object or a course, necessarily leads to the control of that object or course, can cause psychological problems.
Homework Statement
A cord with a mass of 40g is tied between two supports with a tension of 19.2N. The natural frequency of the cord is 10Hz. Find the length of the cord
a.1.2m b.2m c.289m d.34cm
Using your answer from Question 3, how long does the wave take to travel from one end of the...
I am working on a project that involves using an op-amp (among other ic's) to collect EMG signals from arm muscles.
I couldn't get my hands on TL072. Will IC 741 be a decent substitute?
TL072 -> http://www.ti.com/product/tl072
IC 741 -> http://www.ti.com/lit/ds/symlink/lm741.pdf...
Hello I was wondering if some one can give me advice on how to approach these types of problems. I do horrible on these types of questions but do well on all other, any strategy helps.
Homework Statement
This is an example problem:
Oxygen molecules are 16 times more massive than...
Homework Statement
Which of the following is NOT true about an object having constant velocity?
Select one:
a. It has constant speed
b. It is moving in a steady/fixed direction
c. It has constant acceleration
d. It might be at rest
e. It might have a fixed position
Homework...
Your choice of least "facepalm-able" space travel mechanism
If I may use the "facepalm" meter of Sci-Fi hardness.
Examples
The film Gravity, in which only the astronauts in your audience would complain loudly about technical details such as how quickly Sandra took off her space suit, has an...
I am currently in my third year of a physics and mathematics double major. I've taken almost enough mathematics to fulfill the mathematics degree requirements. I plan on becoming a theoretical physicist and attending graduate school. I've listed the courses I've done, and registered for, and...
Hello,
What "choice" does the Axiom of Choice permit us to make? I've searched high and low and not found a satisfactory answer. To me it seems to add no new information to its hypotheses: Given an arbitrary collection of non-empty sets, isn't it true, without assuming anything and just by...
Hey everyone, it's been a while since I posted on here, but I'm having some conflicting thoughts about my upcoming semester. I am hoping to get some outside opinions to make sure I'm not just beating myself up for nothing.
So, here is the situation. I graduated high school in 2010, I was the...
Hello,
I live in England, and in the future I would like to study physics or neuroscience at university. I am currently taking my GCSEs, and I have a dilemma with some of the courses I am taking:
I'm taking a Science GCSE course which includes Biology, Chemistry and Physics, and I am also...
Given a plane with three points, (0,−1), (2,0), and (0,1) with x-axis and y-axis connecting three points to make a triangle. Suppose this triangle represents the support for a joint continuous probability density Pick one of the following:
The marginal density f(y), defined as ∫f(x,y)dx...
I am now going to do my BSc in engineering in EEE or CSE... Now my question is what will be best for me... I have a good understanding of basic maths i.e. algebra,calculus,geometry especially combinatorics etc... To tell the truth combi has always been my favourite...
But I find Physics to be...
Hello I am really interested in technology and inventions and I am thinking about doing physics and engineering. I don't know that much about the academic levels and what opportunities they create so I am not sure If I should get a masters, a phd, or just a ba. I think that I should proobly go...
Homework Statement
What is the direction of the moment?
A) along +x
B) along −x
C) along +y
D) along −y
E) into the page
F) Out of the page
Homework Equations
T=rf
The Attempt at a Solution
I said out of the page because when I use the right hand rule, my...
I understand that at a branch-point a function is multi-valued in a neighborhood of that point and hence will be discontinuous across the branch-cut. However, the choice of branch cut is arbitrary, and I believe should have an affect on the value of the function at various points, not just at...
1. Two blocks of equal mass are each pushed (from rest) along a frictionless surface a distance d. The force applied to block B is four times that applied to block A. What is the velocity of block B, relative to that of block A, vA?
a) 4 vA
b) 2 vA
c) vA
d) vA/2
e) vA/4
2. What is the...
I've just started working through Rudin's Principles of Mathematical analysis. In my opinion, the choice of symbols doesn't promote "rigour" and encourages us to make needless assumptions.
For example, when defining an ordered field, the fourth axiom for addition states:
To every x...
This is probably going to be a very simple question, i just need justification for a seemingly simple step in a proof.
The statement is as follows:
An endomorphism T of an inner product space is {0} if and only if \langle b|T|a\rangle = 0 for all |a\rangle and |b\rangle.
Now it is obvious if...
Homework Statement
In a standing wave on a string
(a)In one time period all the particles are simultaneously at rest.
(b)All the particles must be at their positive extremes simultaneously once in time period.
(c)All the particles may be at their positive extremes simultaneously once in time...
Hello, all.
Perhaps this is the wrong place to post, considering the descriptor for this subforum is "Grad school and PhD help", but I couldn't see an alternative for advice about undergraduate study, so I hope you'll forgive me if this is the wrong place! This is the first forum I've come...
The Axiom of Dependent Choice, a weaker version of the Axiom of Choice, states that for any nonempty set X and any entire binary relation R on X, there is a sequence (x_n) in X such that x_n R x_n+1 for each n in N.
My question is, what would happen if you restricted the relations to...
The investigators suspect that military men may not tell the truth about visiting a CSW. Some may say they did visit a CSW when they actually did not; others will say they did not visit a CSW when they actually did. Is this:
A. Nondifferential misclassification of exposure
B. Nondifferential...
Hi, I am having a problem on career choice. I like astrophysics, but I am also interested in atomic physics. What do atomic physicists do as their job, can they get employment in industries?
Hi, I'll start off with some background information. I am a student at UIowa, going to be a junior, and I was pursuing a pre-med degree. After taking Phys 1, I discovered a newly found passion for the subject. I decided to pursue a PhD in physics. I had a considerable amount of time to verify...
Homework Statement
While solving problems in electrostatics we assign zero of potential to infinity .But we also assign zero to ground as well.
Now there are electrostatics problems where we use both ground and infinity as zero potential .How is that we have two zero potentials within a same...
I have seen many programs on Quantum Physics suggesting that we are the Observer that causes the collapse of the wave function. When I look into the experiments it seems more like the thing that causes the collapse of the wave function is other waves smashing into them. For instance in the...
Hello!
I am a senior high school student and althought I am planning to make an earl application for college I am still not sure about my college major.I am between Aerospace engineering, Naval architecture and maybe architecture. I am in Turkey and when I looked at the recommended high school...
According to a result of Paul Cohen in a mathematical model without the axiom of choice there exists an infinite set of real numbers without a countable subset. The proof that every infinite set has a countable subset (http://www.proofwiki.org/wiki/Infinite_Set_has_Countably_Infinite_Subset) is...
The axiom of choice on a finite family of sets.
I just been doing some casual reading on the Axiom of CHoice and my understanding of the is that it assert the existence of a choice function when one is not constructable. So if we have a finite family of nonempty sets is it fair to say we can...
I've an impeller choice to make for a stirred tank reactor and would love some opinions. Essentially, I've a three level agitator as shown in the sketch I made. RPM is fixed (~85 rpm).
My real choice is only what combination of the two impeller designs I choose. Would you go for a pitched...
I've asked many people about the incredible conclusion of this riddle, whose solution applies the axiom of choice, and have yet to find a satisfying response.
I understand the solution, but I would like to know why the axiom of choice leads to such a bizarre result, while being so compatible...
I am currently enrolling on a BSc Natural Sciences: Physics Pathway with the Open University in the UK and am a UK resident.
Just discovered that they have another degree: BSc Mathematics and Physics.
In respect to future opportunities which degree should I study? Shall I stick with the...
Is the following a theorem from ZFC?
Given a collection C of non-empty sets that includes at least one infinite set, the cardinality of the collection of distinct choice functions on C (as defined in AC) equals the cardinality of the largest element of C.
My feeling that this is true is...
Hi all,
Okay, I'm writing this post keeping in mind that FTL communication (or even backward in time communication) are impossible. However, I fail to understand why this would be impossible using the delayed choice quantum eraser, so my question is: where is the error in my logic here...
Suppose we are given two boxes and we are told that there is a ball in either one of them.
We are free to pickup anyone of the boxes - but only one.
Then we are allowed to measure or check what is in the picked box and the other one.
Normally we would have 50% chance of finding the ball in...
I'm looking for some really good an thorough multiple choice practice finals for my Electricity and Magnetism class. anyone have any recommendations? My goal is to get an A on this final and that is going to be very difficult so i need some really good practice. thank you for you help.
Hi, Iam currently 18 years old. I've always craved knowledge, and as a 12 year old I discovered physics in the light that I see it today. Iam taking courses in math and physics because I really want to work as a scientist.
But Iam not sure if that's what I want in the end, Iam really interested...
I've looked at the DCQE paper by Kim, et al (arXiv:quant-ph/9903047) but I was not able to follow the math leading to the calculation of the patterns R_01, R_02, R_03, and R_04. Specifically, I was hoping to understand the source of the pi phase shift between R_01 and R_02. Is there a property...
Question: http://gyazo.com/54547a60ab590e355a4dc9a6af54650a
part (b), I've found the "u" as the question has labelled it
I have a question when trying to find a position vector that the line passes through:
we have 2x + 2y - z = 9 and x - 2y = 7
would it be OK to let z = 0 and then...
This past Monday I took an exam and got a 99, woot woot! But I can't seem to understand why I got the following question wrong:
Complete the following statement: A simple series circuit contains a resistance R and an ideal battery. If a second resistor is connected in parallel with R,
A) the...
Homework Statement
1. Positive charge Q is placed on a conducting spherical shell with inner radius R1 and outer
radius R2. A point charge q is placed at the center of the cavity. The magnitude of the electric
field produced by the charge on the inner surface at a point in the interior of...
Hello forum,
I am concerned with choosing the correct area of specialization within the electrical engineering masters program I will be starting this Fall; I hope to choose a research area that will prepare me the most for working in the space technology industry. My ideal career would be...
Homework Statement
1. A cylinder of radius R = 6.0 cm is on a rough horizontal surface. The coefficient of kinetic
friction between the cylinder and the surface is 0.30 and the rotational inertia for rotation
about the axis is given by MR2/2, where M is its mass. Initially it is not...
Planck team published several sets of of basic cosmic parameters in their report
http://arxiv.org/pdf/1303.5076v1.pdf
see for example Table 5 on page 22.
The rightmost column of Table 5 is labeled "Planck+WP+highL+BAO".
That seems to be the set of numbers that Ned Wright chooses to report, for...
As a high school senior, I have just heard back from all of my schools and now must make my decision. I plan on majoring in physics tracking myself towards graduate school, and eventually a research position, so naturally I want to be involved with undergrad research as soon as possible...
Hi, I don't quite understand when finding eigenvectors there is usually a free choice of variables to pick, and you can sub in any number to find an eigenvector. Could anyone please explain how this works (and why you can sub in any number), as this usually comes up in vector problems with 3...
How accurate is this statement:
After the photon passes through the detector, it then passes through the eraser. The eraser is an electronic device that alters the wave-function of the photon, just like the detector is an electronic device that alters the wave-function of the photon.
This guy...
To find the closest point to b in the space spanned by the columns of A we have:
\mathbb{\hat{x}}=(A^TA)^{-1}A^T\mathbb{b}
My question is, shouldn't this solution ##\hat{x}## depend on the choice of distance function over the vector space? Choosing two different distance functions might give...
I am learning interesting topics in set theory class. I believe that there is a straight proof of Axiom of Choice II by Axiom of Choice I.
If you don't know the axioms, see below:
Axiom of Choice I states that for any relation R, there is a function F\subseteq R with dom(F) = dom(R)...
When I read the AC, "that the ∏ of a coll. of non-∅ sets is itself non-∅" I understand its meaning, yet I come short from understanding its cardinal importance in Axiomatic set theory.
I have no exposure "yet" in ZFC but I was hoping if someone could clarify to me why is it that AC is such...