increase Definition and 866 Threads

Hello, As I believe is normal policy, please don't give me the answer to the problem :) I would, however, greatly appreciate a bump in the right direction. Homework Statement Triangle abc: side a=12, side b=15, angle C is increasing at 2 degress/minute. How fast is the length of side...

Homework Statement How much heat energy is needed to heat oxygen, mass=10g which is on temperature t=27°C to make the volume go up by 3 times while pressure is constant, and after that increase the pressure 2 times while volume is constant. Specific heat capacity of oxygen is cp= 908 J/KgK and...

am nt sure if am posting in the right section bcoz this is my 1st post.. please could i get help in understanding how to increase the torque of a dc motor without changing the rpm.. n how are gearboxes designed exactly which increase torque.. i basically want a mechanism 2 deliver higher...

I am working on a project and am combining three laser beams in an effort to make artificial white light out of the end of the fiber. It is currently producing about 1 mw of power. How could I increase the power out of the end of the optical fiber?

Homework Statement We were given an assignment to place corn syrup, dish washing detergent, shampoo, water and olive oil in a beaker, along with 6 non-metal objects, to show how they would separate based on their relative densities. The last problem on the paper states: "Write a hypothesis for...

hi friends i am working on project that is to generate electricity by using turbine which is integrated in the front portion of an electric car to charge the battery in turn which is used to propel the car. may i know how much efficient it is and what are the problems may occur to implement this...

I have noticed that during traumatic events say, car crashes, Although the crash duration is less then a blink of an eye, it feels like takes much longer. I think horizon covered a research of time dilation perception that failed.* Anyway is it possible incredible powers of the crash increase...

Imagine you are in your spacecraft , and within your observable universe there is no other body. As far as you are aware, you are stationary. If you shine a light inside your craft you will measure its speed as 300,000kps, as you also will if you shine a light outside the craft. Nothing...

Homework Statement Linearize the equation y = Ae^{-\frac{b}{2m}t}, so that lny is the x variable and t is the y-variable. What happens to the slope and the intercept if you increase b? The Attempt at a Solution Taking ln of both sides, I get the equation t = -\frac{2m}{b} \ln y +...

I want to make sure I clearly identify myself as a noob. I have taken a speaker wire and spliced it 4 times throughout the length of my house and inserted an 1/8" adapter on each splice. The purpose of this is so no matter where I am at... (usually 1 of the four places) I can plug in...

I had 2 people telling me 2 different things...so I don't know the real answer. Does resistance go up or down with an increase in temperature?

I'm trying to calculate the temperature increase in a filament which a pass a current through. It's a very fine wire, so making direct measurements is difficult. Also, it's stainless steel 310 instead of a standard material. I can adjust the current, but want to correlate how the power...

Hello everyone, Ok so red blood cells break and release haemoglobin. Now I checked a book and it all it showed is that this haemoglobin binds to haptoglobin and goes to liver. Now billirubin is made by reticulocytes in spleen using haem. So does liver break this haemoglobin haptoglobin...

I want a step-by-step logical argument that show that the law of increase of entropy follows necessarily from the second law of thermodynamics . I know that this is found in many textbooks but I see that it is always incomplete.

Homework Statement Helium has the special property that its internal energy is directly proportional to its absolute temperature. Consider a flask of helium with a temperature of 20 C. If it is heated to twice its internal energy, what will its temperature be? 1. 293 C 2. 313 C 3. 40 C 4...

I was reading about resistance and it said that resistors are used to limit the current in a circuit. How does a resistor reduce the current in a series circuit? They lose energy therefore they move slower? Or does it simply prevent electron flow? In addition to that, how does adding more...

Homework Statement By what factor would the rate of a reaction for which the activation energy is 159 kJ be increased by a temperature rise of 10degreesC from 25 to 35degreesC? Homework Equations The Attempt at a Solution

I forgot long time ago the little I knew of VB applied to Excel. Can anyone give a snippet of VB code to get the value in cell C8 to increasing by n every time I click the mouse on cell C9? I recall that being possible but I am clueless now. Gracias for any help.

I'm just getting into physics and know that the entropy of the universe tends to a maximum. So in the long term stars burn out creating a lot of high entropy. However the left overs of dead stars - the dust and bits of left over radiation then can reform under the influence of gravity to...

I have the variation of the ideal gas equation: n = PV/RT Assuming that everything else is equal and only temperature rises that will mean there are more moles than before. Is that right? How can that be? Thanks for clearing it up.

I am currently a sophomore at Rutgers New Brunswick and majoring in Computer Engineering. What should I be doing to increase my chances of getting a job after graduating besides good grades?

Before a few days ago I always thought that when transformers decrease the voltage, the transformers increase the current. Then on another thread at Physics Forums, people have told me that when transformers decrease voltage, they don't increase the current. The PFers told me that the...

Does radiation from electrical devices such as computers, phones, WiFi etc.. have an effect on hair loss? Can't really find a lot of articles on the net about it.

i was just reading an article i got linked to from google, about the North magnetic poles location is moving towards siberia currently at about 45k per year, which has increased over the past 100 years from around 15k per year, it was explained that it was possibly caused by density variations...

Long story short, I'm trying to "easily" increase the bandwidth of a transimpedance amplifier which is limited by the intrinsic capacitance of the feedback resistor, R. The knee frequency is of course given by f = 1/(2*pi*R*Cr), where Cr is the intrinsic capacitance of the resistor. As...

Homework Statement A rectangular plate has an area of 76 cm2. If the temperature increases by 199 ◦C, calculate the increase in the area. Use 2 × 10−6 (◦C)−1 as an average coefficient of linear expansion. Ignore terms of second or- der. Answer in units of cm2. Homework Equations...

How to specify a lens to increase angular responsivity of optical sensor? Sensor I presently use has angular responsivity +/-60 degrees at 50% level and I would like to increase it to +/- 80 degrees at 50% level or more. Which lens should I use? Please advice on design guidance for this...

does friction in any way increase when the surfaces get very smooth ...? a teacher told us that it can increase due to electromagnetism...is it true...i searched the net but couldn't get any useful info...

I have the Thrust Specific Fuel consumption plot for a turbofan engine versus the Mach Number. Until Mach = 1, the TSFC increases steadily for different flight altitude conditions (0 km...10 km, with the 0 km line on top and then 2km, 4 km etc). Can anyone tell me why TSFC increases with the...

Hello, I have a problem with my code, it uses too much memory. Aside from optimisation of the code (which I am constantly working on), how can I increase the memory which is available to MATLAB? >> memory Maximum possible array: 435 MB (4.564e+008 bytes) * Memory available...

Homework Statement A massless spring hangs from the ceiling. How much does its potential energy increase, if a 28.8 kg mass is attached to it? The spring constant is 4800 N/m. The Attempt at a Solution I set 0.5Kx^2=mg. I then divided the spring constant by mg. I got 17 J. This...

Homework Statement A gas is contained in a metallic cylinder fitted with a piston. The piston is suddenly moved into compress the gas and is maintained at this position. As the time passes the pressure of the gas in the cylinder- a)Increases b)Decreases c)remains constant d)increases...

Homework Statement http://img694.imageshack.us/img694/9990/fig24a.jpg" The scenario is, the water in the beaker = system 1. Everything else, including walls = system 2. The bunsen burner heats the water in the beaker. dU or the change in internal energy of system 2 decreases. dT or the...

Homework Statement Find the unit vector e at P=(0,0,1) pointing in the direction along which f(x,y,z)=xz+e-x2+y increases most rapidly. The Attempt at a Solution In order to find the direction where f increases most rapidly, I found the second derivative of f. I don't know how to put the...

I understand that as temperature increases the volume of the container will also rise. Due to the particles having more KE and coming in contact with the container walls more frequently and with more force. My question is.. why isn't the inverse true? When you decrease the volume of the...

Homework Statement Given an array with random real elements, find the indices pair (i, j) where j>i s.t a[j] - a[i] is maximised in O(n ln n) time I tried sorting the array of (value, index) pair with O(n ln n) sort, and then inspect the index array. However it does not suggest me any...

Dear colleagues My code in Fortran passes all data in one large vector. I increased the size of this vector for the maximum that the compiler accepts but still need more positions allocable to it. Is there any way I can increase the memory allocation of the compiler? Thank's

2) The point in the middle of the string is the maximum speed, at this point occurs when the point passes through its equilibrium position (the position it occupies when the string is perfectly flat). To increase the maximum speed of this point which of the following would you change? Select all...

pressure=p(x,t)=BkAsin(kx-ωt) http://www.physics.unomaha.edu/Sowell/phys2120/Lectures/Sound/Sound.pdf Surely, when loudness-intensity-pressure increases, so does the maximum displacement A of the speaker. Wrong thread title. My question is: Why increasing the maximum molecule...

I did an equilibrium calculation with some chem software that I have and it told me that a syngas reaction CH4+0.5O2\rightarrow 2H_{2}+CO which is an exothermic reaction will proceed to completion at high temperature. If you increase temperature, that should drive the reaction backwards...

Surely, its maximum displacement A increases. But what about its speed? Increases, decreases, remains the same? And what about the number of the vibrations of its maximum displacement per sec? They increase or decrease or remain the same? This number is the frequency of the music f, or...

Hi! Hope someone can help, I am currently studying an Open University course and I am a little confused by a statement in one of the textbooks. It says that the value of the fine structure constant increases with collision energy (in Electron/Positron annihilation). I am probably being...

the function is: x/(x^2 - 9) i have found the horizontal asymptote(y=0) and vertical asymptote (x=3, x=-3) the first derivative is giving me problems =(

I read that lifting an object higher increases its potential energy. Is this true? I can't see how, considering: Ep = mgh F = mg so Ep = Fh F = (G x m1 x m2)/ d2 so Ep = (G x m1 x m2 x d)/ d2 so Ep = (G x m1 x m2)/ d So the greater the distance between the object and the...

By way of clarification, this post is intended as a question, not as some thinly disguised alternative theory. So, as possibly an uninformed generalisation, it seems that the verification of most cosmological models must ultimately depend on observations that are predicated on the detection of...

Hi folks, I'm brand new here... never been a part of a physics forum before and I'm just an amateur I have no professional or academic background hah most is a grade 10 "science" course (a unit on bio, unit on chem, unit on physics not even specified and barely touched physics). Anyways...

How are IGE antibodies related to an increase of allergies in the world?

Hi I was just wondering if anyone could please help me, I was just wondering what would happen to the supply curve if; 1. There was a recession. 2. And if oil prices increases. what would cause the supply curve to shift? thanks heaps for your help Mel

when approaching C the mass of your craft increases. If the mass of your fuel increases also wouldn't that mean the faster you go the more fuel youll have?

Homework Statement A simple pendulum consists of a small object of mass 2.4 kg hanging at the end of a 2.0 m long light string that is connected to a pivot point. (a) Calculate the magnitude of the torque (due to the force of gravity) about this pivot point when the string makes a 3.0° angle...