Increasing Definition and 449 Threads

I have a tube 1 m long and 1 m wide with an ideal fluid inside with a pressure of 1 bar. I conect that tube of 1*1m with another tube of 1m long and 0.5m wide and this connected to another tube of 1 m and 0.25 m wide and so on So i have a tube in which every 1 m of length the wideness of...

Hi, I'm in need of some help putting together this proof. I'm not sure if it's just harder than it looks, or I need to spend more time learning how to put them together. Homework Statement Show that f(x) = 9x^2 + 3x is strictly increasing on the interval (0, 10] Homework Equations...

What is the effect of increasing the width of a wire on it's resistance, and why? Thanks Neil

Homework Statement Given a circuit with one battery and a single resistor. The circuit has a battery voltage of V, a total current I and resistance R. To increase the current by a factor of 48.0 then by what factor will the voltage need to be increased? A. 12.0 B. 90.0 C. 65.0 D...

Specify the steps of an algorithm that locates an element in a list of increasing integers by successively splitting the list into four sublists of equal (or as close to equal as possible) size, and restricting the search to the appropriate piece. (Hint: see binary search algorithm.) can...

I have been stuck on the question for so long...please can you see if you can help me out.:smile: Is the entropy in the universe increasing? If yes, when did entropy start increasing? if no, what is happening to entropy in the universe? Thank you very much for any help.

If a person drives the same distance twice, and saves 10 mins by driving 5mph more the second time, what is the distance and the speeds?

A function f : A ->R is increasing if f(x) <= f(y) for every x, y in A such that x <= y. Suppose that f : [a, b] -> R is increasing and that a < c < b. i want to shat that : lim f(x) = sup{f(x) | a <= x < c} and x->c- limf(x) = inf{f(x) | c < x <= b}. x->c+ and whether these...

I have no idea whether or not this is a ridiculous question, so I am just going to ask it. My question is based on the concept that energy must be added to ions to get them to form compounds (such as the formation of hydrogen iodide). Typically (or so my chemistry textbook says), the addition...

Increasing comforts - > Decreasing Happiness ? My value education sir gave us this topic for group discussion. He told us that a survey was conducted which showed that Bangladesh was among the happiest rated countries in the world while several developed nations were lower down the rating...

A ball is rolled down a frictionless incline at some angle \theta below the horizontal. If you increase the angle of the incline by a factor of two (make the ramp steeper downward by twice as much), does the ball roll down at double the speed? Here is what I said: No. because of the following...

I'm trying to find the size of pipes that are to carry a certain amount of heat in them, 6000 W. This formula should give me the amount of water needed: m=W/(4200*delta T) Delta T is 20 degrees (the diff between supply and return), but what I don't get is that if I increase the supply and...

Hi If anyone know's something about electromagnets. I was wondering if you could either explane to me, or show me where I could find some information about whether or not icreasing the amount of volt's would have an effect on how strong the electromagnet would be. That would be great!

O2 + 8,3x10^-19 J -> O + O My textbooks says: My question is: Shouldn't that radiation be absorbed increasing O2 kinetic energy? If not, why? Thank you.:approve:

My (high school) physics teacher was telling us about quarks and how the colour force between quarks is responsible for the strong nuclear force among baryons. He also claimed that unlike other forces, this force became stronger over a distance which is why it requires a lot of energy to...

I learned that the distance betwee the Moon and the Earth is increasing but I couldn't find the reason for it, Is it because of the Earth's orbit? I mean that when the distance is minimum , causes the moon to move towards the sun ( Newtonian laws ) and even when the distance becomes maximum the...

Simple statistical question. Lets say that we have set of values: 45 40 30 36 11 10 75 102 113 125 137 140 149 you can see that it has a good tendency to increase (even if we have decrease in the middle). But in set: 68 33 21 31 7 7 13 123 21 33 67 64 29 9 5 87...

We've discussed this before, physicsts aren't the highest paid proffesionals. Well to look at matters more, neither are engineers,programers,technogis or scientests. The average was about 50K for beginners and the highest was 120K fir seniors. WHile higher than the average population not...

Find intervals on which f(x)=-x^3 + 12x +5 , -3<x<3 is increasing and decreasing. Where does the function assume extreme values and what are these values ? does anybody knows how to do this??

hi, thank you for helping For same momentum change if we increase the time of impact by factor ten then force is smaller by factor ten. But why is that? I mean why doesn't a moving object at point of impact give away all of its momentum at the instant it hits something,no matter if that...

Hi there. Im afraid i know very little about electrical engineering:confused: , hence why I am here, but any help / direction / suggested reading would be much appreciated! Like i say, sorry if this is a completely stupid question:blushing: , but if you don't ask you don't get right? and who...

I am currently very pale and try to get as much sun exposure as i can without getting burnt but i never seem to get dark most probably due to my genes as i have blonde hair and blue eyes. Is there anything I can eat which will increase melanin production?

Suppose f:[a,b)->R is such that lim(x->b-)=+inf. Prove that there exists an increasing sequence {x_n} in (a,b) such that f(x_n)>n for all n. I don't know where to start. It would be easy if I can prove that f is strictly increasing after some point. f might not be continuous so I can't simply...

I've been reading a lot lately about how people have vehicles that have a really good fuel economy. Some even seem considerably better than what the normal car can get. It makes me wonder if there are modifications being done to achieve this. I drive a 2000 GMC Sierra Z-71 5.3L truck...

In mutual induction, how can we increase the induced current, not e.m.f.?

For diffraction by a single slit, what is the effect of increasing (a) the slit width, and (b) the wavelength? It was a problem on my daughter's final and I never seemed to be able to answer it for her. :confused:

I don't know what would happen.. Fm = qvBsin(theta) If B is increasing, will velocity of a charge increase? Or will only its radius decrease? Or both? Fc = Fm mv^2/R = qvB mv/qR = B anyone know? *acceleration was a bad choice of wording :) I mean will velocity increase..

Hey. I was doing a question and it asked what would be the graph of an AC motor if the speed was doubled. (the previous period was 10 ms). I think that the frequency would be doubled but would anything happen to the amplitude?

A hypothetical question: Say that Newton's constant G is increased a bit during the period between weak interaction decoupling and the time when photodisintegration becomes ineffective, and the helium is formed. (I.e. during the period when neutrons just decay). Would that give a larger or...

If you have air moving at 10-20 meters/second through a very small (8mm3 volume) metal box open on both ends and you want to increase its temperature by around 1.3 times as it passes through the box, what is the most efficient way to do it taking into account the heat lost to the box...

I usually employ a Toshiba portable computer of 2.8Ghz and 500MB RAM to make heavy calculations of Computational Fluid Dynamics. It runs under Windows XP Home. I was wondering how can I improve the capacity of dealing with data of my computer. The fact is I use mainly Matlab v6.5...

Hello all y = \frac {1}{4} x^4 - \frac {2}{3}x^3 + \frac {1}{2}x^2 - 3 Find the exact intervals in which the function is (a) increasing (b) decreasing (c) concave up (d) concave down Then find (e) local extrema (f) inflection points So I found \frac {dy}{dx} = x^3 -...

Hello all If you are given the function y = x - 3e^-x^2 and you want to find the intervals where the function is increasing and decreasing, concavity, inflection points and any local extreme values, would I first find the derivative? My work If f(x) = x - 3e^-x^2 then f'(x) =...

Let say we have a sliding box. The box is sliding because of an constant force perpendicular to the box. There is no friction and no air restistance. Does the speed of the box increase or is it constant. ?

Folks, This is the solution I have for a problem in my textbook regarding sequences. I just need to know whether I have the right idea in mind. Thank you very much! We can use an analogus function to show that the sequence given by a_{n+1} = \sqrt{2+a_n} \quad a_1 = \sqrt{2}...

I partitioned my hard drive into two sectors (I installed windows on one).. it turns out to be too small (sp2 makes a backup of the whole system :rolleyes:).. I'm at a loss how to redistribute the size though :rolleyes: Anyone a clue? I'm running Windows XP (I guess I need to go into BIOS at...

As a neutron star collapses further and neutron degeneracy pressure causes neutrons to increase in mass (by virtue of high speeds), if that mass increase weakens the force of gravity it could stop a singularity from forming.Is there any evidence that particles with large mass increases due...

I'm having trouble getting the answer without doing a guess and check. Q: Find the maximum angle a projectile can be shot so that it's distance from the origin is always increasing. Air resistance negleced. So there is the x and y position based on initial velocity, angle, and time, but I...

This has to do with global warming, and a new solution to cooling buildings in Toronto. I read today where the near freezing water from the bottom of Lake Ontario will be channeled into large buildings in Toronto to cool them, thereby decreasing the need for traditional, air conditioning, and a...

I'm furious with Matlab. when I reach a 1*10.000 array or similar figures it says to me: "out of memory". Does anybody know how I can do larger the virtual memory dedicated to this programe?. I have a 40 GB and 500Mb RAM computer, so it would be enough for eating anything!.

if you take a laser and shine it into another set of mirrors so that the light shoots out of the opposite end through which the laser first went into the second set of mirrors, would it be more powerful than when it started (the second set of mirrors would have a lasing medium)? if so, could you...

hey guys what's up? just recently I've been working on this potato battery thingy in chemistry class and the highest i can get it is 15 volts. i knwo there are a lot of variables involved but are there any suggestions that you might think would help achieve a higher voltage? i was thinkin of...

Every time a measurement is made – the methane level rises. Most people on this Forum think I’m a loon. I’m a loon that gets it right an awful lot of the time; From the below Physics link; https://www.physicsforums.com/showthread.php?t=16799 Check wrote; “Anyone want to take a guess?”...

The first of my two questions concerns the aspect of SR that deals with the mass of an object increasing as is moves faster and faster (or more appropriately, as the energy gets larger and larger). I'm a novice when it comes to higher level physics, and everything I know comes from reading books...

According to the best current data available to cosmologists today, the universe is not only expanding, but the speed of which it does so is increasing. This is well-known but the cause for it is not. There are many different theories, from dark matter and dark energy to ideas revolving...

Is there an equation that predicts the increasing values of mass of a spinning top that is increasing its velocity steadily towards " c ".

The number of registered cases of whooping cough in the United States has increased significantly. Especially children under the age of 5 months are at the most risk, since they haven't been fully vaccinated against the disease. The number of cases was 19,798 in the '90s, an increase of 49%...

The Graph above shows the speed of a car traveling in a straight line as a function of time. (Sorry no graph) The car accelerates uniformly and reaches a speed Vb of 3.20 m/s in 8.00 seconds. Calculate the distance traveled by the car from a time of 1.80 to 3.60 seconds. Im not sure what...

Let's say that there is a spoked wheel but the spokes are tubes with freely moving masses inside and that there is no friction. Given a certain fixed angular velocity, what I want to find is the final radius after a certain angle of rotation (assume 270 degrees). An assumption is made that the...