increase Definition and 843 Threads

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...

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 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...

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...

HI, My question as per above. A quick check with Physicsclassroom.com reveals that a (perhaps too simplistic) reason is that more and more air molecules are hitting the body as the body falls through the air. But i am confused. I thought when the body first falls through the air fluid...

I would like to increase the maximum current that a PWM signal from a microcontroller can source/sink from +-25mA to +-500mA. The output should have the same peak-to-peak voltage (0 to 3.3V) and should not be inverted (i.e. follows the input). The PWM frequency is ~30kHz. I have looked...

Hello everyone, In anameia related to iron, plasma tranferring increases and iron decreases. How does this increase the total iron binding capacity of the enzyme. If I draw a sample of blood, there would be some transferrin enzymes in excess lowering iron binding capacity right? Thanks :smile:

Will the velocity V2 be greater than or less than velocity V1 in the attached sketch? Yes and why or No and why not.

The radius of a circular ink spot, t seconds after it first appears, is given by: r=\frac{1+4t}{2+t} Find the rate of increase (in cm/s) at the time when th radius as doubled from its initial value. I have attached my working; however, the answer is 7/9cm/s and I keep getting...

If electromagnetic waves loose energy as the increase their distance, is there an equation that reflects the loss of energy?

Increase reflector output? Greetings, I have been workings on a Solar Tracker. I have some small TV sat dishes that I am planning to cover with Mylar to create the reflector. After viewing some videos on YouTube I noticed that a larger dish produces more heat. Would adding a lens increase...

Hello; According to the GPE formula you gain gravitational potential energy as you go higher up (further from the centre of gravitation). Does this mean that your mass increases with distance? Thanks.

Hello, I was hoping someone could answer my question. So i am wondering ..lets say i have a p-n diode. What happens if i increase the dose of the p-side of this junction . What happens to the reverse breakdown of this diode? People say that the reverse breakdown decreases when you increase...

Until now, I always that that a relativistic mass increase was literally just the increase in the mass of an object. Today I googled it, and a couple sources say that it is just an increase in energy, not mass. Can anyone confirm this? At first I thought if the mass increased, then it would...

(In college) It seems possible that to have 4.0's and 3.0's , that it's logical to deliberately not take teachers who don't grade fairly? (For example particular teacher who assigns homework and then all of his exams look NOTHING like the homework. )

Homework Statement A clock is placed on a floor covered with lead density \rho and thickness d. Use dimensional analysis to show that increase in gravitational field strength at the clock dueo to the layer of lead is proportional to Gd\rhoHomework Equations The Attempt at a Solution to show...

Homework Statement An Earth (mass M) satellite of mass m is in a circular orbit of radius r1. It is moved to an orbit with a larger radius r2 by way of an intermediate elliptical orbit. This is achieved by firing rockets for a short period when it is in the inner orbit, and then firing the...

Hi, I was wondering... if by heightening a sofa (150cm in length approx) from floor level by about 20-30 centimeters, would increase, or could potentially increase the strain in the centre of a sofa when people sit on it? I have a long sofa, that was raised and I notice that my sofa is sagging...

Hello everyone, I always though when reactants are heated up, there are more collisions and more like a reaction is to take place. However this is not the case for spontaneous reaction according to Gibbs equation. Why is that? Thanks :smile:

I want to make a testing system to test a high pressure water pumps. I need to know how much is the flow in a certain pressure. I bought a flow meter to measure the flow but I couldn't simulate the pressure I need. I DON'T know if there is a kind of valve that can increase the pressure to make...

Wikipedia says that the core temperature of our Sun is 15.7×10^6 Kelvins. I don't know what that means in terms of protons' velocities inside the core, but I bet they move pretty fast. Could they move that fast that they have a noticeable increase in mass due to their relativistic speed...

I recently attended a lab at uni where we were required to examine the conservation of energy for a fluid steadily flowing through a pipe with a series of obstructions. The actual setup was quite simple; A pipe of length ~4m ran horizontally (no change in elevation throughout the whole flow)...