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Ardinus

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I am a college student looking to enhance my science/math skills while providing opinions on social/ethical situations.

  • What causes a rage response?

    Setting: group talk session. The topic of the group was about understanding other individuals.

    Situation: a girl was talking about how it's meaningless to make connections with individuals because relationships ultimately end. An analogy was brought up that life is like swimming - and various people brought up different bodies of water and a natural fear of being attacked by something like sharks. The group was discussing how the ocean is obviously most risky as compared to a kiddie pool... and the one girl mentioned that she wanted to stay where she wouldn't get hurt. I added that I thought it was best to take on the ocean - come prepared, bring a weapon to fight off the predatory animals, oxygen for diving, and swim fins. Bigger risk means greater benefits if you make it. She shot down the analogy, and I took it personally. I reassured her that I didn't think she was weak - and another person reassured her that she cared but each time she got more and more frustrated. She shut everyone down, especially me.

    What would cause someone to respond so harshly? I guessed that it was because maybe in the past, someone said they cared and didn't really mean it and she responded "God no that's... that's not it all just... jeez seriously???" Why would someone respond like that? Isn't the point of group to discuss the problems?

    2 AnswersMental Health8 years ago
  • Convergent Series, is it telescoping and geometric and what are the steps to figuring out why?

    The sum from k=1 to infinity of [1/(5^k) - 1/(k(k+1))]

    The BOOK answer is that it converges to -(3/4). I triple checked it.

    For the first part, I treated it as a geometric series where

    a = 1

    r = 1/5

    and S = (5/4)

    For the second part I did a partial fraction decomposition where A = 1 and B = -1

    I wrote out the terms to see how it would telescope, and ended up with 1 (bc the limit as k approached infinity of -1/(k+1) was 0)

    So my final answer was (5/4) - 1, so S overall was (1/4)

    Why do I have such a drastically different answer?

    1 AnswerEngineering1 decade ago
  • How do you solve a vector addition problem that involves counteracting forces?

    The question reads as follows:

    Two adults and a child want to push a wheeled cart in the x direction. The two adults push with horizontal forces F_1 and F_2.

    |F_1| = 100N @ 60 degrees above the horizontal.

    |F_2| = 140N @ 30 degrees below the horizontal.

    a) FIND: the magnitude and direction of the smallest force that the child should exert. You can ignore the effects of friction.

    b) FIND: If the child exerts the minimum force found in part a, the cart accelerates at 2.0m/s^2 in the +x direction. What is the weight of the cart?

    Answers:

    a) 17N @ 90 degrees below horizontal

    b) 840N

    I am wondering how to think about the problem in order to find the answers given. I triple checked this problem so typos shouldn't be a problem. Please be organized in your explanation so that I may apply your steps to future physics problems.

    So far I have calculated the resultant vector, R to be 171.8N @ 5.54 degrees above the horizon. I am not sure if this is the correct method to solve this problem because I have no idea how to use this!

    1 AnswerPhysics1 decade ago
  • What is the grenades' velocity with respect to the antagonists' car?

    The question reads something like the following:

    In an action-adventure film, the protagonist is supposed to throw a grenade from his car, which is going 87.0 km/h, to his enemy's car, which is going 116 km/h. The enemy's car is 13.2 m in front of the protagonist's when he lets go of the grenade.

    Find: the magnitude of the initial velocity of the grenade if its' initial velocity is at an angle of 45 degrees above the horizon.

    Both vehicles are traveling on a flat, straight road in the same direction. Air resistance can be ignored.

    Also find: the magnitude of the velocity relative to the earth.

    Please label all of your steps and if possible explain in detail how the problem relates to velocity vs. time graphs (x and y). It may also be simple vector addition/subtraction, I don't know. That's why I'm asking you for help :)

    3 AnswersPhysics1 decade ago
  • Is it legal in Allegheny County, PA, for a tow truck driver to take a vehicle when the owner is present?

    1) The vehicle was not obstructing traffic, nor was it on private property.

    2) The vehicle was completely owned by the owner, no debt was owed.

    3) The owner was present just before the tow truck arrived on scene.

    4) The vehicle was movable, but not very drive-able (having just been wrecked).

    5) The owner informed the tow truck driver that another tow truck would be able to tow the vehicle – the car was not going to be left abandoned at any instant.

    6) The tow truck driver refused to tell the owner where the vehicle was being taken, the owner was responsible for investigating where the vehicle was taken.

    7) The tow truck driver refused to use a flatbed truck at the request of the owner, which was necessary to avoid further damage to the vehicle.

    8) The front end of the vehicle was being damaged while the tow truck driver hooked it up to the truck.

    9) The owner was charged $300 for the tow and storage. The car was not in the impound lot for more than a few hours.

    *Note: impound lot does not mean that the vehicle was repossessed. This was simply the towing company’s place of choice.

    I have reason to believe that the tow truck driver behaved in such a way because there was profit to be made. Many parts of the car – including the entire engine – were functional and could be sold for more than the net worth of the vehicle.

    This is probably why the owner was not informed of the location of the vehicle after towing.

    What legal actions would you take following such an instance?

    2 AnswersOther - Cars & Transportation1 decade ago
  • Is it legal for a tow truck to take a vehicle from an objecting owner?

    A tow truck towed a wrecked car while the owner was present - it was clear that the owner objected to the car being towed by the tow truck - and it was not a repo situation. The owner was charged $300 dollars, $25 of that for the storage cost for just a few hours.

    The tow truck driver did not tell the owner where the car was being taken either. He said "I am getting my money".

    8 AnswersLaw & Ethics1 decade ago
  • Why is this not a unit vector?

    i(hat) + j(hat) + k(hat)

    1 AnswerPhysics1 decade ago
  • 2 inch patch of itchy red skin near nipple, what could it be?

    I poked it and there is a small hard spot under the skin that hurts, but only when I poke it. There is no discharge. I am sexually active and have been looking at many possibilities - including cancer. I have not found anything very helpful online and cannot go to the doctor because I have a hectic work schedule. I am starting to get very frustrated. Does anyone have any idea what this could be?

    1 AnswerSkin Conditions1 decade ago
  • What is the structure of patchouli oil?

    Or is it more complicated than that?

    I have a little bottle of patchouli oil that I bought a year ago. It is supposed to smell like really rich dirt but now resembles tequila. I am wondering if perhaps it was oxidized to form an alcohol - are there any parts of the molecule that would be prone to this?

    1 AnswerChemistry1 decade ago
  • Curiosity: do the trapped miners get paid for the time they are trapped?

    I think they need OT for all that stress.

    5 AnswersCurrent Events1 decade ago
  • Has anyone had personal experience with this eye problem?

    I was walking to one of my classes when all of a sudden I had double vision. It wasn't blurry, just one image poorly superimposed on the other. I felt kind of a light burning behind my nose for a moment. I had to grab onto a railing and stare at a number pad and then close my eyes really tight and rub them a little to make it finally go away... even then as I walked away there were some residual effects.

    I looked at WebMD and it said it could be a thyroid problem - like Grave's disease, or it could be shingles. I'm not sure what to narrow it down to exactly. Any advice/suggestions?

    Also - I do not wear contacts or glasses.

    1 AnswerOptical1 decade ago
  • Are you good at derivatives - 1st and 2nd, quotient rule and lots of simplifying?

    This is part of one of those giant graphing problems. I think the part I'm messing up is the part where I have to find the derivatives of this:

    f(x) = x/(x^2 - 4)

    I need f '(x) & f "(x) in their simplest forms, please do not worry about explaining much unless you do something totally alien to the thing.

    Here are my results after simplifying:

    f '(x) = (-x^2 - 4)/(x^4 - 8x^2 + 16)^2

    f "(x) = (6x^5 - 48x^3 + 96x)/(x^4-8x^2+16)^3

    I had to use my calculator to find the zeroes/factors, which were 2 and -2. There is supposed to be one at 0 I think - according to the graph of the original function? It's a mess :(

    1 AnswerMathematics1 decade ago
  • Do you know L'Hopital's rule? (5)?

    Now for some trig!

    I have written this problem in at least 3 different ways:

    lim(as x approaches +infinity) xsin(pie/x)

    and none of them yield the infinity/infintiy or 0/0 necessary for L'hopital's rule. (Always infinity/0)

    The answer is supposed to be: pie

    4 AnswersMathematics1 decade ago
  • Do you know L'Hopital's rule? (4)?

    lim(as x approaches +infinity) {((1-3)/x)^x)}

    I applied log properties so I get:

    Lny = xLn((1-3)/x)

    But I am stuck because negative numbers are not in the domain of the natural log fxn - so I cannot split this up and take Ln(1-3)/Lnx or Ln(1-3)-Lnx

    The answer is supposed to be e^(-3)

    3 AnswersMathematics1 decade ago
  • Do you know L'hopital's rule? (3)?

    lim(as x approaches 1) {(2-x)^tan[(pie/2)x]}

    I took the natural log of both sides

    Lny = (tan[pie\2]x)(ln(2-x)) and that yields 0X0

    I cannot simplify by tanx=sinx/cosx because then I would have (0X0)/1

    The answer is supposed to be e^(2\pie)

    1 AnswerMathematics1 decade ago
  • Are you familiar with L'hopital's rule?

    I am in Calculus 1.

    The problem is that I need to know how to make this into a form that is acceptable by L'hopital's rule:

    lim(as x approaches positive infinity) [x-Ln(x^2+1)]

    The answer is supposed to be positive infinity, but I do not know how.

    1 AnswerMathematics1 decade ago
  • My mom wants to know my conversation with another person, what should I do?

    It starts when I moved out of my parents house. I ran into one of mom's friends who was curious why I disappeared. I told her a couple little tidbits of information about mom that I probably shouldn't have, but I did.

    A year later, I moved back in with my parents. My mom knows that I saw her friend and wants to know what I said to her in person and email. It's not enough for me to tell her, she wants to see hard evidence of what was said. ( I haven't told her yet, but I know if I do she will only ask for more).

    I told my mom that I am not going to show her the emails because that was between me and her friend - and her friend didn't seem comfortable with me sharing the information. I know that if I show mom, she will corner her friend because she does that kind of stuff to me all the time - maybe without realizing it.

    I am wondering what you would do in this situation. Would you email her friend and explain the situation? (I don't want her to feel like she can't say no). Would you tell mom off with the idea that mom needs to solve her differences with her friends and should confront her on her own? Would you just let it go and let time do the rest? Or anything else. I can't think of any other options and the three I presented seem equal.

    1 AnswerFriends1 decade ago
  • Who here is in support of Obama?

    Yes or no. Easy as pie.

    11 AnswersElections1 decade ago
  • what are your opinions on joining the military?

    Do they pay for schooling, how long do you have to go... any horror stories or otherwise? Decisions decisions...

    9 AnswersMilitary1 decade ago
  • Internet browser preference?

    Have you ever opened several internet browsers at once, then tried going to different sites?

    If you have - you've probably experienced that annoying moment when one browser loads while you're typing in another... then it pops up in place of the one you were just typing in. You're still typing a little so you're hitting shortcut keys for the newly loaded page - which screws other things up.

    Meanwhile, the browser you were just in is sitting there... partially filled with a query or address.

    Is there any way to change this? (So that loaded pages do not dominate the computer)

    I've tried looking through internet setting options but have found nothing.

    15 AnswersOther - Internet1 decade ago