Increasing Definition and 449 Threads

Would you please help me with the question: The graph of derivative f'(x)= (1/4)x(x-6) is given. What value is greater f(-2) or f(10)? It is permitted to sketch f(x) using f'(x) graph, but you can not take the integral of f'(x) directly.

Hello all, this is my first post here and I am glad to be a new member of the PhysicsForums community! I have a question which I believe will be a good challenge for the bright minds here: I am trying to create a system of Al-Air batteries to power a motor which will be hooked up to an rc car...

Homework Statement (First of all sorry for my English, I don't know any scientific expressions in English...) A Force given by the type F=5x + 5 (x at metres, F at Newtons) is applied to a body of mass m while it creates (the Force) an angle φ with the horizontal level. The coefficient of...

Newb here with a question. correct me if I've got anything wrong(I'm assuming I've got quite a number of errors here, so be patient) I'm assuming that in a rocket, the energy release in the combustion chamber is directed 2 ways, up and down and the one that provides propulsion is the force...

whats happening so that entropy is increasing?

I am trying to wrap my head around what it would take to bring water vapor to superheated state. It seems that if you had a vapor stream and shot it with continuous laser energy (CO2 or other gas laser) you could instantly create a high quality steam. I am teetering between buying a diode...

In my physics lab , we do our expt. : analysis of HYSTERESIS curve which requires a current of 1-2 A to magnetise the solenoid , now we have a ready made instrument for getting that value of current . So what could i do manually in order to get that magnitude of current from AC mains which...

I'm working on a design for a certain kind of generator. My main issue is that based on how the generator works and the circumstances in which I am designing it for, I end up with the problem of having very little voltage but a whole lot of amps. My theoretical/ideal voltage is .065v, and my...

Hello everybody, I am new to this forum and cosmology in general. My knowledge about cosmology and astro-physics is rudimentary :shy: so guys cut me some slack. From the limited information I know , I feel that phenomenon of gravity leaking might be related to the phenomenon of the...

Homework Statement Let f, f1, f2, f3, ... be continuous real-valued functions on the compact metric space E, with f = lim fn. Prove that if fi ≤ fj whenever i ≤ j, then f1, f2, ... converges uniformly. The attempt at a solution I was trying to reverse engineer the proof, but I'm stuck...

http://dl.getdropbox.com/u/119319/pully-1.jpg the book says the answer is C because 'increasing the diameter of the pully decreases the amount of force required to pull rope A'. I don't understand why increasing the diameter of pully B does not have the same effect (i.e., why D is incorrect.)

Hello Everyone, I am on a FIRST Robotics Team. This year, the game has presented us with a new challenge. The playing surface is made of rough plastic, but the wheels are hard smooth plastic. Basically killing friction, or at least reducing it by 1/6. Now, my question is how do I...

Homework Statement Is f increasing or decreasing on f(x)=2x^3+3x^2-36x+5 on [-1,1] Homework Equations The Attempt at a Solution f'(x)<0 for all x in (a,b), then x,y and x, y in [a,b] implies f(x)>f(y) and f is decreasing

Homework Statement If you increase the temperature of an ideal gas, then a. the average distance a molecule travels between collisions must increase b. the pressure must increase c. the speed of its molecules must increase d. the average time between collisions of its molecule must...

http://img135.imageshack.us/img135/9429/asdaauh6.jpg I'm not too sure about this, I thought as a example function e^x, where I can say as x gets larger then so does e^x and then so does its derivative at those values of x. But what if it was a function where as x increased the function...

Homework Statement Let f : R(real numbers) (arrow) (0,infinity) have the property that f ' (x) = f (x) for all x. Show that f is an increasing functions for all x. Homework Equations The Attempt at a Solution I know that if f ' (x) > 0 , where all of x belongs to a,b (not...

Homework Statement let g(x)=2x^5-10x^3=15x-3. find the intervals on which G is increasing and decreasing. and find the intervals of concavity and the inflection points Homework Equations The Attempt at a Solution i know how to find the increasing and decreasing intervals. i just...

I need some clarification on definition of Entropy. According to the simple example of the egg in the kitchen, the entropy of the whole egg is lower than that of a cracked egg. This, it is said due to the fact that, there are more ways to be broken than a whole egg. But, if one talks of a...

1. What is the pressure needed to increase the melting temperature by 20 centigrade degrees? Given: Molar Volume (solid) at normal melting temp is 18.92 cm^3 Given: Molar Volume (liquid) at normal melting temp is 19.47 cm^3 Homework Equations delta H (s>l) = T(melting point)* delta S(s>l)...

General 3rd degree polynomial always increasing problem? Please Help! What conditions on a, b, and c will make f(x)=ax^3+bx^2+cx+d always increasing? For a function to be always increasing, the first derivative has to be always positive. So, f1(x)=3ax^2+2bx+c>0 I tried finding the...

(A) being a common pivot point for (B) and (C). In relationship to (A), I would like to have (C) move twice the DEGREE OF ANGULAR movement as (B). Any suggestions or thoughts on how I might accomplish this would be GREATLY APPRECIATED!

Hi everyone, In a light bulb, as we increase the temperature of the light bulb, the colour produced by the light bulb changes from red to blue ( intensity vs frequency curve shifts to the left). But if i want to have a red bulb with higher intensity ( i.e. brighter red) without...

If i have a series DC motor and at say X rpm it has a back emf of 11.5v and supply voltage of 12v and i increased the supply voltage (keeping rpm the same) would the back emf stay the same? and if not would the diffrence between back emf and supply increase? Thank you.

I am slightly unsure about how the divergence can be increased by the use of either bi-concave or plano-concave lenses. I understand the general theory behind it but am having trouble putting numbers to it. e.g. if you have a laser beam with a diameter of 2mm and a divergence of 2mrad what...

I just want to verify that I have the right mindset here on the subject: p=mv You can increase the momentum as much as you want, but when v reaches the speed of light, it cannot increase any more, but since momentum is still increasing, that means the mass must be the one to increase, for...

Before we start, can you just explain how to start me off? I understand the idea of all limits, just a few tricky ones that were assigned for homework. (note: ALL limits are x --> infinity) Homework Statement lim ^{}\frac{10}{x}lim \frac{x^{2}+a^{2}}{x^{3}+a^{3}}lim (1 - r^{x}) , |r| < 1...

Could someone explain why the R.S. Integral is defined for a monotonically increasing integrator? Can't we use a decreasing fuction anologously?

When describing where $sqrt{x}$ (square root of x) is increasing, it's from zero to infinity. But, do you say (0,inf) or [0, inf) ? (I'm tutoring a student in pre-calc, and this came up. They don't know any calculus.) In a situation like where is $x^2$ inc/dec, we'd say inc: (0, inf)...

i face difficulty in Q where we hav to arrange compounds/aromatic compounds in increasing order of acidity r basicity,please tell me easy way to solve such arranging sequences Q quickly.:confused:

Question: A space shuttle is in an orbit about the Earth. At its apogee, it uses thrusters and increases its velocity by 400 m/sec. What is the new orbit semimajor axis, eccentricity and how much will the next perigee altitude be increased? Known: Original semimajor axis: 7000 km -> a...

If one is trying to reduce Earth mean temperature, why not cover it with aluminum foil? :D

Homework Statement Order the following compounds in order of increasing lattice energy: AlN, BaTe, KCl, Rb2Se Homework Equations The Attempt at a Solution Ok I know that as the distance between the two nuclei decreases and as the charge of the cation and anion increase the lattice energy...

Homework Statement This is probably easy but i can't seem to see how to make it work right now. I am trying to show that if we have a function f:R-->R that is increasing, then for any interval [a,b], it is riemann-integrable. I know it's true because a book I saw refers to another book...

So the function is f(x) = 2 + 3x^{2} - x^{4} Find the intervals of increase + decrease, local max + min value, inflection points (IP), interval the function is concave up + down I know that I need to first find f'(x) to find the increase and decrease, so I solved that: f'(x) = 6x -...

Increasing Row Size... Homework Statement There are 150 rows at a concert hall. Each row you move back there is an increase of 10% in the number of seats. The first row has 100 seats. How many seats are there in the concert hall?Homework Equations I don't know the equation to represent this...

A stereo receives its FM radio reception from a small wire strewn out the back. How do I increase the reception? Would I need a bigger wire, longer wire, or is there some other way to increase its reception? The wire is removable; it clips into a metallic contact built into the stereo

any one know the formula for an ice skater in an increasing spin

Dear peeps, i am currently facing a problem here. i am tasked to place PV cells within an area and maximize the efficiency of PV cell by focusing sunlight on the cell itself. I am wondering if it is possible. I am thinking of placing 3 cells in a U shape. 1 at the bottom facing up and 2 at the...

Just a simple question, there's a mass on an incline surface and if the parallel force is greater than the frictional force would the mass be accelerating at a constant rate or increasing rate?

hi everyone, if a stationary point charge is placed in an increasing magnetic field, is the force on the charge due to the magnetic field = 0? because Fb = qv*B and v=0 then how would I derive the magnitude of the force on the charge due to the magnetic field with the magnetic field...

If the temperature of an organ pipe is increased above room temperature thereby increasing the speed of sound waves in the pipe but not affecting the length of the pipe significantly, what effect does this have in the frequency of the standing waves produced by the pipe? My attempt If the...

What causes the feedback (a noise increasing in intensity and pitch) sometimes heard when people speak through microphones? I'm sure I have enough background to understand an explanation, I've just never thought about it before.

Hello I am quite a physics noob and the following is something I wouldn't bet on but is more of physics concept practice. But if it works, great! Specific questions/problems that I would like an answer to will be denoted by a number and the blue twirling smiley(:smile:), for your convenience...

Homework Statement For the function f(x)=xln(x²), x≠0 The Attempt at a Solution f'(x)=2+ln(x²) For the function to be increasing f'(x)>0 2+ln(x²)>0 ln(x²)>-2 x²>e^(-2) Taking square roots of both sides ±x>±(1/e) How can I find the intervals from this? (Somebody has...

Hi, I took apart my grinder/polisher and adjusted a small pot in there and it lowered the speed right down which will be useful for my car as a paint flatter. Only problem is it lacks torque. I was wondering if it is possible to increase the torque. Access is ok and the project is a realistic...

Cannot remember the name of a curve that begins with a lesser radius and tangents off into an ever increasing radius until it is almost a straight line. Very commonly used in art deco design. Thanks for your help.

If x is positive and increasing at a rate of 2 units per second, at what rate is x^4 increasing when x=4? I don't even know how to start. If you can help me I would be greatful.

Ok. K this equation I am suppose to make has to variables The magnitude is increasing at a certain rate. It is a pattern. I need to find an equation for this pattern Say we have: r^0 r^1 r^3 r^6 r^10 Ok. As you can see, the added magnitude is increasing by 1 everytime. I need to...

Hi, I have only had a personal interest in physics so far and have yet to complete so much as one basic introductory physics course. I'm in second semester calculus, so I'm not hopeless on some fronts of understanding terms or mathematical ideas, but I have yet to understand what a manifold is...

Hi All, I'm building a balloon car and I'm in need of ways to increase the speed of the car. Here's a description: Attach a balloon to a car. Rave the balloon powered car over 3 meters. The car must move on its wheels and the sole source of propulsion must be provided by the balloon...