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.
Hello folks,
I was born in West Africa, Sierra Leone of non African parents but environmentally I'm African. I've been living there all my life. I was in the best school in the country and when I took the London A Levels at age 17 I was first in the whole country in the science stream. That was...
Homework Statement
see attached file
Homework Equations
The Attempt at a Solution
ok so I get that the answer is B
but is it because they have the same q/m ratio?
This comes from Greene's Fabric of the Cosmos:
Wheeler imagines a cosmic version of the delayed choice experiment in which the light source is not a laboratory laser but instead, a powerful quasar in deep space. The beam splitter is not a laboratory variety, either, but is an intervening...
Hi, I just purchased a Book on physics from amazon. What do you think of it?
My criteria was:
Fundamentals
High end theory's
Mathematical/Theoretical explanation
Mathematical overviews
Do you think the book matches?
https://www.amazon.com/dp/0321501217/?tag=pfamazon01-20
Do you think...
hello,
I really need some advice on my study
I am actually at a cross road to choose my course for my undergraduate study. But , I can't seems to make up my mind .
I love mathematics and physics , but would prefer to do more calculations than physics question, love chemistry too. However...
Homework Statement
If you step up the voltage in a wire by a factor of 100, how is heat affected?
A. No change
B. Heat loss increases by a factor of 10000
C. Heat loss decreases by a factor of 10000
D. Not enough information to tell
Answer: "C, heat loss decreases by a factor of 10000...
5. A force of 12 N is applied tangentially to the rim of a wheel with radius 0.70 m and rotational inertia 3.0 kg-m2. What angular acceleration results?
a) 2.6 rad/s2 b) 2.8 rad/s2 c) 3.2 rad/s2 d) 3.4 rad/s2 e) none of these
____6. If the force in question #5 acts for 20 s, what will be the...
In solving the two body problem we choose the center of mass of the system as the origin.
But is the frame of reference we are setting up inertial? I don't think so.
Suppose the central force is gravitation, A has mass 4kg and B has mass 1kg.
If we put an object at the center of mass...
Good evening,
I am unsure as to whether or not I am posting this question in the apropraite section of the this forum and apologize if I am not. With that said I will let you in on the question that I have for you tonight.
I am currently a fourth year undergraduate student pursuing a...
Homework Statement
Suppose f: A → B is a function. Show that f is surjective if and only if there exists g: B→A such that fog=iB, where i is the identity function.The Attempt at a Solution
Well, I believe for a rigorous proof we need to use the axiom of choice, but because I have never worked...
It is claimed that DCQE is equivalent to a single-photon double-slit setup. However, In this experiment, the 351.1nm Argon ion pump laser beam is divided by a double-slit, which means the actual photon rate is 1013 times higher than in a single-photon setup.
Consequently, it makes it possible...
Can someone list the different interpretations of QM and how they differ in their predictions on the nature of reality, and what wave function collapse really is?
I keep flip flopping between thinking the weirdness in QM is just our human minds not comprehending reality correctly and...
Hello, the delayed choice quantum erasure experiment seems really intriguing and although many sources seem to state that the results are what has been predicted by quantum mechanics, I'm having a very hard time understanding the results conceptually. What is exactly happening that causes there...
I need help with all of these. I am so lost on all of them and have been working for hours. Anything is so appreciated.
_____1. A rock is dropped off a cliff and falls the first half of the distance to the ground in t1 seconds. It falls the second half of the distance in t2 seconds. What...
Hello all, I have a choice to make, and it is a pretty hard one, I need to choose a degree. First off let me tell you what I like and what I expect from a degree. Well I consider myself a creative and inventive person, since I was little I was attracted to...
Hello all. It's been awhile since I took a circuits class, so any help would be greatly appreciated. Thanks in advance.
Homework Statement
See attachment for circuit drawing and question.
Homework Equations
OHM's law? V=IR
Idiode = Io - id
The Attempt at a Solution
I've tried...
I love astronomy, physics, and mathematics. For the past couple years I have been set on becoming an astrophysicist, but as of late I have been questioning the exact field of physics I would like to get into. I will preface by saying I have no prior physics classes under my belt, but understand...
In Theorem 26.7 of Munkres' Topology, it is proved that a product of two compact spaces is compact, and I think the author seems to (rather sneakily) use the choice axiom without mentioning it... Could anyone tell me if this is indeed the case? I don't have a problem with the choice axiom, but...
Good choice of books for my linear algebra syllabus
Hello guys, I am looking for some good books for linear algebra.
I have got Linear algebra by, David Lay and Anton .
However I am studying Linear algebra in another language than English
and our syllabus is a bit different from...
My claim is simple: people enjoy many arbitrary activities due to their own subconscious baggage which we've acquired as a result of an overly unnatural (another side to this is the diabetes epidemic), unminimalistic lifestyle. And ultimately, everything is the same. It's the same core...
Hi,
I have been assuming something I never took the time to prove because it is beyond my scope so to speak. But I am on the path, rest assured.
My question is, is it possible to describe correctly say, the color force, using a different gauge group, regardless of the difficulty? That is...
I have a few questions regarding how the future looks like for a few master degrees I'm thinking about to choose in a few years. I might be out pretty early because it's 3,5 years left until I'm going to have my masters degree, but I like to plan ahead and know what is waiting for me.
First...
Hi everybody, I have a question: I have this guy I want to do Fe-based superconductor research for. He is uncommitted to a family, manages to keep out of administrative things in my physics department, and for it has managed to publish six things in a year. He also has a personality similar to...
I'm working on some topology in \mathbb{R}^n problem, and I run across this:
Given \{F_n\} a family of subsets of \mathbb{R}^n , then if x is a point in the clausure of the union of the family, then
x \in \overline{\cup F_n}
wich means that for every \delta > 0 one has
B(x,\delta) \cap...
Hi, I'm in desperate search of an article related to Interaction Free Measuremnt and Measurement Theory:
John Archibald Wheeler, "The 'Past' and the 'Delayed-Choice Double-Slit Experiment'," pp 9–48, in A.R. Marlow, editor, Mathematical Foundations of Quantum Theory, Academic Press (1978)...
You attend a multiple choice question exam, and you have n (say 10) questions whose answers you don't know at all.
There are 4 choices in each question.
A correct answer yeilds 1 marks.
An incorrect answer has penalty of -0.25 marks.
Is it wise to attempt all the questions in random? It...
Homework Statement
Question:
Rank the paths according to the corresponding change in the gravitational potential energy of the rocket–moon system, greatest first.
A. 1 > 3 > 5 > 2 = 4 = 6
B. 2 = 4 = 6 > 5 > 3 > 1
C. 1 = 2 = 3 = 4 = 5 = 6
D. 1 > 2 = 4 = 6 > 3 > 5
The Attempt at a Solution...
Homework Statement
In a collision between two unequal masses, how does the impulse imparted to the smaller mass by the larger mass compare with the impulse imparted to the larger mass by the smaller one?
A) It is smaller.
B) The answer depends on how fast they are moving.
C) They are...
Homework Statement
Find the power of set of all choice functions for P(N) - {0}.
The Attempt at a Solution
I really don't know how to start with that. Hope you will give some clues.
Homework Statement
An alternating voltage is given by v = 30\sin(314t).The time taken by the voltage to reach 30V for the first time is:
A. 0.02s
B. 0.03s
C. 0.1s
D. 0.015s
Homework Equations
google for equation for instantaneaous current and voltage
The Attempt at a Solution
30 = 30sin(314t)...
Homework Statement
which are properties of all Electromagnetic radiation
I the travel at the speed of light in space
II they propagate through the creation of mutually perpendicular electric and magnetic fields
III they are constant and do not vary with time
IV they have the same frequency and...
OK. I'm a high school student in Ontario, soon to be applying for university. I have a couple of questions.
First, I want details on the differences between theoretical physics, and regular physics. I seem to have a much heavier inclination towards theoretical physics, but it seems that...
I am dealing with a problem,which can be formulated Ax=B,in the first place I wanted to solve it with conjugate gradient method.BUt A is not positive definite.Which are the other iterative options in this case?
Homework Statement
Charge Q is located at the (x,y) origin. q is a distance r in the +x direction from Q. 2q is a distance 2r in the +x direction from Q. Which of q or 2q is at a higher potential? q, 2q, or same.
The Attempt at a Solution
I am thinking that it would depend on Q. Q=0, then...
Hi there,
I need some advice as to improve my sleep quality. I have not been able to sleep very well and usually wake up with a stiff neck and headache sometimes in the morning. My neck is relatively long and I don't feel that my uncomfortable pillow is doing what it should.
Can you...
"I was convinced that light must be causing the collapse of wave function, but Wheelers Delayed Choice Experiment seems to have confirmed otherwise. We can determine the state of a particle (ie wave or point) by choosing to observe, even if the decision about whether or not to observe is made...
Homework Statement
You have a pair of inclined planes such that a block that slides down one can slide up
the other without losing any energy in the transition. The inclined planes are both at an
angle θ from the horizontal, as shown in the diagram. The inclined plane on the left is...
Problems related to conservation of momentum/energy can be solved by taking reference frame which is stationary to center of mass or which is stationary to ground/observer. So when to use what frame or which frame is beneficial in which case/type of problems? I m confused !:confused:
Hello!
I'm trying to write an essay on RQM. The problem I have encountered is the diffrent choices of matrices for the dirac equation.
The two choices that I´m mixing up in my equations are:
\begin{eqnarray}
\gamma^0 = \left( \begin{array}{cc}
I & 0 \\
0 & -I \end{array} \right), \quad...
Two students are taking a 10 question test. Each question has 4 different answers. How many ways can each student answer the test? What is the probability that these two students get the same answers?
I know that to get the number of ways to answer, the number of students is irrelevant.
nk...
Hi guys,
I'm really struggling with the beginning of my PhD project and could use some opinions how I should proceed. And also just to express my feelings in a written form.
So in a few weeks I'm about to officially become a full-time PhD student working in a research group where I have...
Theoretical Physics and Mathematics?
By doing the joint would I miss out on valuable theoretical physics and be less able to specialise...?
I mean a Theoretical Physics degree involves a lot of mathematics anyway right?
Thanks for any advice :) !
So, I have to take 3 extra electives for NINTH grade. I was talking on the phone at school and my choices were immediate. I'm wondering if I took the right courses (which business/computer classes). If it helps, I prefer business and computer classes.
Files attached
P.S. I am definitely...
I'm starting the natural sciences course at Cambridge in 2 weeks time.
The modules I'll study in the first year are maths, physics, materials and chemistry and I'll specialise in physics after that.
I applied for theoretical physics for my other uni choices but had no problems picking...
Hello physicsforums, I'm currently an Engineering and Science student (3rd year at university), currently having doubts about just what I want to do with myself.
I'm currently studying chemistry, but have really only been making sense of the physical stuff. I got into QM, didn't like organic or...
Hello I am a sophomore at Penn State currently in Aerospace engineering. I am stuck between engineering and physics like so many people out there. I have taken engineering classes and it seems a little boring. At least at my school engineering has been displayed as the conceptual development of...
I'm not sure if this question has any sense. Either way, hopefully someone can help me see either the right question or the right way of thinking about this. I don't have any special background in set theory, myself.
A set is countably infinite if there is a bijection between it and the...
Do you think Independents are the more mature choice? I mean I don't know of an 18 year old who is independent. Or doubt there are many young people in the Independent camp.
Further, they don't seem to be clouded by any closed ideas or principles nor too open to overwhelming change. They seem...
Hello!
Well, I am 16 years old and when I graduate high school I want to study theoretical physics. I have some question about that.
I live in Bulgaria. Here the level of education at that sphere is not well developed, so I would prefer studying abroad in countries like Germany or the UK...