Choice Definition and 667 Threads

Homework Statement Which is true about the method find? //Return TreeNode with target value, or null if target not found public static TreeNode find(TreeNode root, Comparable target) { if(root == null) return null; else if(target.compareTo(root.getValue()) == 0)...

I'm having trouble if what course I should take... :cry:... Accountancy or Engineering? Which one?

New here, hello :) Which of following mixtures will be a buffer when dissolved in a liter of water? a. .1 mole of Ba(OH)2 and .2 mole of HBr b. .3 mole of KCl and .3 mole of HCl c. .4 mole of NH3 and .4 mole of HCl d. .2 mole of CH3COOH and .1 mole of NaOH e. .2 mole of HBr and...

Homework Statement Hey guys i was taking some practice excercises and was wondering if someone could give me the answers to the following: 1.The following questions are about this experiment in which a test-mass moves in a horizontal circle at constant speed. What is the direction of the...

Hey guys i was taking some practice excercises and was wondering if someone could give me the answers to the following: 1.The following questions are about this experiment in which a test-mass moves in a horizontal circle at constant speed. What is the direction of the test-mass...

Why did Einstein chose R_ab - 1/2 g_ab R = k T_ab the Right side is basically saying the mass/energy causes the curvature and must be a conserved quantity, but why is the curvature expressed like it is on the LHS i know it is conserved through differentiation but why that and not any other...

A capacitor is first connected to a 6.0 V battery and then disconnected and connected to a 12.0 V battery. How does the charge on one of its plates change: (a) It increases, (b) it decreases, or (c) it 1stays the same? (c) (because the charge on the plate is depending upon...

[SOLVED] Current and Drift Velocity (multiple choice) 1. In a dental X-ray machine, the movement of accelerated electrons is east. The current associated with these electrons is in what direction: (a) east, (b) west, or (c) zero? 3. At first I thought it was B (west) because...

I'll have to take a class next semester as a junior level EE that I'm not really looking forward to. The reason is because of the professor. He is a nice guy to talk to, but as far as teaching, he is the worst. It is one of the most common known facts at my school. I had him for a class this...

Homework Statement A man pushes an 80 N crate a distance of 5.0 m upward along a frictionless slope that makes an angle of 30° with the horizontal. The force he exerts is parallel to the slope. If the speed of the crate is constant, then the work done by the man is: a) 61 J b) 200 J c)...

There is an axiom/lemma from Teichmilles & Tukey that is equivalent to the axiom of choice. It reads, Every family of sets F that is of finite character (http://en.wikipedia.org/wiki/Finite_character) possesses a maximal element. I just want to confirm that here, "maximal set" means a set...

Match the reaction type with the reaction: AnSwErS: A) Synthesis B) Single Replacemet C) Double Replacement D) Combustion E) Decomposition Problems: 1. 2Na + Cl2 2NaCl 2. 4NaF + O2 2Na2O + 2F2 3. 4LiH + AlCl3 3LiCl + LiAlH4 4. 2H2O 2H2 + O2

I need some guidance and hopefully you guys will help me choose on what career I should pursue ... First of all, I dislike English, mostly Shakespeare Second of all, I don't really enjoy chemistry, but I do enjoy physics except for electricity which I HATE with a passion Third of all, I love...

When you see a homeless, destitute person, do you ascribe their poverty mostly to willful choice, or a series of unfortunate events out of their control?

Homework Statement Which one of the following statements is NOT true for a rotating CD undergoing angular acceleration? A) The angular speed is the same at any point on the disk B) The lnear speed is the same at any point on the disk C) The angular accerlation is perpendicular to the...

As In my other thread I am currently a computer engineering student, and in junior standing but currently have not taken any EE classes and am only up to Calc 2 Linear Algebra E & M Programming languages. I am very weak in math and its a really struggle but physics is even harder as the...

Is it worth it, one seems to miss out on everything, ok i get paid buckets of money, but i never have time to spend it, but then i am almost my own boss and do not have to put up with the day to day triva, just the c--p that the day shift leaves me with, stuff that they say they had no time to...

the axiom of choice. Help! well i am having trouble understanding why we need the axiom of choice. So could anybody post here some problems, and their solutions, that include the axiom of choice, and explain how it works, so how it is used in solving problems, and explain why we actually need...

Kinematics Question (Speed, velocity and acceleration) Homework Statement For each of the following situations below circle the appropriate signs for each quantity listed. Assume east is + and west is - (see photo below) Homework Equations None I believe The Attempt at a...

does the lagrangian depend upon upon my choice of generalized coordinates

In ZF, AC implies the ultrafilter theorem (every Boolean algebra has a free ultrafilter). Is the converse known to be false? That is, is there a model of ZF where the ultrafilter theorem is true and AC is false? Does some weaker version of AC (countable choice, for example) imply the...

Homework Statement Two small light bulbs are placed close together to try and create an interference pattern. This pattern would not be visible due to the: a. random phase differences between the light waves from the two sources b. very high speed of the light waves c. diffraction of the...

Hello ! here is a link towards an article describing an experiment that is a realisation of Wheeler's delayed choice gedanken experiment : http://arxiv.org/abs/quant-ph/0610241 the conclusion is quite interesting : "Our realization of Wheeler’s delayed choice GedankenExperiment...

Embry-Riddle. Bad choice?? Hello All. I just finished my senior year of high school and I have sold my soul to Embry-Riddle Aeronautical University for 32,000 a year. Actually I got the cost cut down to about 15 thousand a year but still that's a fortune for my family. (My father makes about...

Well I like the maths and physics a lot so I am going to study an engineering, at this moment I am considering 3: aerospace engineering, civil engineering or mechanical engineering. I like the three, that's why i need your help to make a better choice. the diferences, etc.

Homework Statement If f is a continuous real valued function, then the def integral from 0 to 1 of f(x)dx = a. limit as n-> + infinity of 1/n * the sumation from k=0 to n-1 of f(k/n) b. limit as n-> + infinity of the sumation from k=1 to n of (1/k)*f(k/n) c. limit as n-> + infinity of...

I need to choose the best schedule for next year (I'm going to be a Junior in High school). Please help me decide which option I should go with. Thanks! 1st choice: (7 Classes) AP Calculus APUSH AP Biology AP Enviornmental science English 11 H (Highest English 11 class in our school)...

Hey, I will be completing my course in Electronic and Computer Engineering in May of this year. My course has covered a broad range of topics from Analogue Circuit Design to Development of Embedded Systems to Object Orientated Programming in Java and C++. I now have to decide which path to go...

Is ther a mass loss at the time of death? Can brain states be frozen? [9] arXiv:0704.1054 [ps, pdf, other] : Title: Geometry of Time, Axiom of Choice and Neuro-Biological Quantum Zeno Effect Authors: Moninder Singh Modgil Comments: 13 pages Role of axiom of choice in quantum...

Here are some muliple choice questions I am stuck on. Thanks in advance for help anyone can give me. 1) A falling object that has reached its terminal speed continues to gain? a.speed b.both speed and acceleration c.acceleration d.neither speed nor acceleration. I think the answer is D...

Homework Statement A rocket moves through empty space in a straight line with constant speed. It is far from the gravitational effect of any star or planet. Under these conditions, the force that must be applied to the rocket in order to sustain its motion is ? The Attempt at a Solution I...

I had thought up this situation where faster than light data transfer could occur, which turn out to have been thought of before. It is something called the Delayed Choice Quantum Erasure. http://en.wikipedia.org/wiki/Delayed_choice_quantum_eraser "...Even more surprising was that, if you...

[SIZE="3"][FONT="Georgia"]Hey, I have to answer the following multiple choice questions ... its relevant to my exam which is day after tomorrow. Can anyone please tell which options should be the answers and why... I don't have any clue about these. So please don't delete this post ... instead...

Question: What would happen if this was delayed even further? We are talking nanoseconds here, but what if the particle was slowed or sent far away, before being reflected back? What I'm getting at is... What if the delay wasn't nanoseconds, but seconds? What if it was minutes? What if it was...

axiom of choice do you need to invoke the axiom of choice to choose a point from a collection of sets if the sets are single-point sets? for example, suppose f:A->B is injective. to create a left inverse g:f(A)->A, we need to "choose" a point from the preimage of b for all b in f(A) and...

i have this question: if: X=U X_i for every i in I, where X_i's are non empty and are disjoint, then |X|>=|I|. obvously there's the one to one function from I to X, which is g(i)=X_i, but my question is according to my text i need to use here the axiom of choice, i don't think i used here the...

Did you ever think that on going back to a choice made in the past and choosing the opposite, the results to your life would have been different ? Somewhere in your life can you pinpoint an event which defined you and your destiny depending on which path you chose to follow ? Or in spite of...

Newsweek had an article earlier this month (10 November) about a conference on Science and Religion attended by many top scientists including Nobel laureate physicist Steven Weinberg. Weinberg said something that was both poignant and apt. I never heard anyone use this figure of speech...

Hey Folks! I'm 23, currently a 1st-year Physics Major (started a little late), and I'm having a really enjoyable, yet frustrating problem. I have to many interests and have no idea what I want to eventually go into. Currently my interests are Quantum Computers, Physics of Neurscience...

I'm wondering if there is a version of Zorn's lemma that applies to collections that are "small" in a sense I'll describe below, and which true independent of the axiom of choice. Specifically, say I have a collection of sets such that each set in it is countable, but the collection as a whole...

Hello everyone, I'm confused on what the answer is here, it looks like he circled every answer but i don't see how that's possible. So maybe he cirlced c and b and marked a and b wrong. http://suprfile.com/src/1/3pyqpub/lastscan.jpg How would I test to verify that c and d are correct? if b1 =...

What is the answer to this question(see attachment) ? i thought the answer was (B) but it is (C)

If people are "biomachines" and every action that we make is determined by physical law (quauntum mechanics is still physical law) then how can we have free choice? If we don't have free choice then what's the value of any scientific theory or philosophical argument - the person that said it...

Delayed Erasure Demystified Delayed choice quantum erasure experiments claim to produce a 2-slit interference pattern in a beam by 'erasing' the which-path information contained in an entangled beam. There's an implication that the erasure happens after the interference is measured, and that...

Does the choice function let me choose exactly one element from a set? The set which I am choosing from must be the domain of the choice function, correct? Also, if I have a finite set, say something like X = \{a,b,c\} where a, b, c are distinct non-empty sets, then can I construct a choice...

i read that there are some logicians who do not use the axiom of choice in their axioms systems. i wonder what is the math that isn't using the axiom of choice, or what theories do not use it?

I have a question about the delayed choice quantum eraser with the double split experiment. Forgive me if this is a silly question.I have seen the following: TEST 1 1. shoot the particles & measure the result 2. erase the result 3. check the wall (whatever you shot the particle at) = wall...

Ok i am studing and the book doesn't give answers. Here are a few questions i gave. What do you think. I will list pictures and test. For pic/question 1 - Will the answer be d - roatating the loop 90 degree ? Would it make sense that since the magnetic field is going into the paper i...

question In a particular experiment a long length of copper wire of very low resistance is rotated by two students. The ends of the wire are connected to a galvanometer, G, and a current is detected. Which of the following is LEAST likely to affect the amount of current produced? (A) The...

i'm currently attending a community college in california, I'm a physics major, and i will apply to transfer to universities this fall. by looking through a lot of the threads here, i realized that prestigious universities probably have bad undergrad programs. so now I'm really looking towards...