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Homework Statement Suppose a power plant delivers energy at 9.7E2 MW using steam turbines. The steam goes into the turbines superheated at 665 K and deposits its unused heat in river water at 298 K. Assume that the turbine operates as an ideal Carnot engine. a. If the river flow rate is...

What are different ways I can increase the chance of getting into the college I want to go to? I'm in grade 11 right now.

Ok, so there were these things I was reading about. Mental chunks of memory. I also remember "five, plus or minus one." How can I work to directly increase the size of my chunks?

Homework Statement How much larger than 2000 is 2184 in percent? 2. The attempt at a solution I'm struggling with understanding what figure should be divided by the other. If I do 2000/2184*100 I get 91.6, obviously not the right answer. If I do 2184/2000*100 I get 109.2, leading me...

me and my friend are having an argument about this. I say that because frictional force is less than or equal to the coefficient of friction times the normal force, and that neither the coefficient of friction nor the normal force can be increased while an engine is running(until it's oil is...

So say, I'm writing a program with an infinite loop, and that I'm trying to write a file that is as large as the disk drive is, in the smallest possible time. What would be the best algorithm to do it? Clearly, such an algorithm would consume as many system resources as it possibly could. So...

a spherical balloon is being inflated. find the rate of increase of the surface area (S=4 pie r squared) with respect to radius r when r is (A) 1 ft, (B) 2 ft, (C) 3ft. Here's what i did i found the derivative of s and i put 4 2R and then i plugged in the numbers in R and i got 8 ft...

Homework Statement A man (weighing 915 N) stands on a long railroad flatcar (weighing 2805 N) as it rolls at 18.0 m/s in the positive direction of an x axis, with negligible friction. Then the man runs along the flatcar in the negative x direction at 40.00 m/s relative to the flatcar. What...

The other day I saw a report indicating that the Saudis have now begun protecting their interests by increasing production, thus moderating the price of crude so as to keep alternative fuels out of reach. I don't recall exactly where I saw this, probably on PBS or a Sunday news show, but I did...

A large aquarium of height 5.00m is filled with fresh water to a depth of 2.00m. One wall of the aquarium consists of thick plastic of 8.00m wide. By how much does the total force on that wall increase if the aquarium is next filled to a depth of 4.00m.

I was explaining the construction of Thomson's apparatus for determination of specific charge for an exam today and suddenly something popped up: Consider 2 oppositely charged plates held using insulated handles (They're not connected to a battery). If an electron moving with a velocity v...

Anybody else noticed the sudden increase in homework help type question posted here. Anybody got any suggestions as to why?

Here's the question: If the pressure of a substance is increased during a boiling process, will the temperature also increase or will it remain constant? It seems like it would increase because boiling is basically the release of pressure to create equilibrium. Is this right? Thanks a lot.

I have a car with a switchable transfercase that will allow me to choose between running FWD and AWD. I'll be putting the car on the dyno shortly, and I was just theorizing drivetrain output differences. Obviously HP numbers should drop roughly 15% because of the increase of mass on the...

I have heard of people using liquid nitrogen to boost their processor speed quadruple. Why? My best guess is because the electrons start to move so fast it makes it harder for them to merge and transfer energy. This may be completely off, I know. :rolleyes:

Everytime I plug something into my laptop USB port it tells me "This device can perform faster". Is that something I can do without replacing any hardware?

i'm looking for help to a question that i have, i have tried every thing to find an answer to it. the qustion is "how would would an increase in fuel burned affect the PV daigram of a given engine. i belief it has to do with changing of the pressure and volume figures on the PV diagram. if...

Homework Statement A motor attached to a 120 V/60 Hz power line draws an 7.60 A current. Its average energy dissipation is 840 W. How much series capacitance needs to be added to increase the power factor to 1.0? (in micro F) Homework Equations Don't know which to use at all. The...

Homework Statement How much work must be done to increase the speed of an electron from rest to 0.52c? Homework Equations I don't know :) The Attempt at a Solution I tried E=Ymc^2 where Y = 1/[1-(v/c)^2]^1/2 and got 3.19821x10^-22 J which translates to 1.998x10^-9 MeV, but I don't...

Here I describe one mechanical engineering situation that is very useful in any kind of mechanical and energy consumed industries.I hope you will try to understand it and use it. If you find any difficulty to understand ,feel free to ask me. we can increase efficiency of rotating shaft...

oic. thanks a lot. y is directly proportional to x2 x is increased by 100% find the percentage increase in y. so, y= k x2 then y= k x2 y=k 4 x2 so 4 x2 is already increased by 100%? then to find k which is y=k 4 x2 k= y/ 4 x2 find the percentage increase in y, so what i...

y is directly proportional to x2. x is increased by 100%. Find the percentage increase in y. so, y=k x2 y= k (100 + x2) then i went to find the k, which is k= y/ (100 + x2) so i put back the k which i found into y= k (100 + x2) which is : y= y/(100 + x2) (100 + x2) them I...

If a spinning ball hits the floor is it possible for it to increase in velocity in the direction it is travelling? If so could you please explain with an example? And what Equations would you use? Thanx.

Hello, I was wondering if anyone knew a calculation or method to determine the amount of current moving through a given material, knowing the resistance of the material, the specific heat and the temperature (while the material is actually being heated by current). Thanks, -scott

Is it possible for a wheels forward velocity to increase when separated from a moving vehicle? If so please describe what makes this possible?

Well the author claims you can vastly increase your intelligence by simply swimming underwater for a couple of weeks. I want to know what you guys think, and if it would even be safe to try: http://www.geniusbydesign.com/other/windocs/guarante/guaran3.shtml My own opinion right now is a...

Im not sure if anyone can help me with this, I haven't seen a question like this I am guessing its easy. I tried just taking the integral and evaluating, bu tthat gave me a wrong answer. Q:The marginal cost of producing x units of a certain product is 74+1.1x-0.002x^2+0.00004x^3. Find the...

Hi everyone, I'm given a graph of the object's displacement and frequency and the object is executing SHM. The question asks what would the graph look like when the mass of the object is increased to lower the amplitude of the oscillation. Personally I think that the natural frequency...

Im having a problem with curve sketching i can't figure out how to do this problem. I am confused. Heres the question 1. For the following curve find: a)the domain b)the intercepts c)the asymptotes d)intervals of increase or decrease: local maximum and minimum e)concavity and the...

Sir, 1)When one of the prongs of a tuning fork is cut, why does its frequency increase? Is it because the damping forces exerted by the prongs on each other decreases? 2)When an incident wave and its reflected wave superimpose, it is said that both standing waves and progressive...

A water trough is 6 m long and has a cross-section in the shape of an isosceles trapezoid (dimension shown in the diagram.) Water is being pumped into the trough at a rate of 0.5 m^3/min. How fast is the water level rising when it is 0.5 m deep. AFAIK the volume of a trapazoid like this should...

Sir, The diameter of a metal ring is D and the coefficient of linear expansion is y. The temperature of the ring is increased by 1 degree Celsius. What is the increase in area of the ring? I solved it the following way: Coefficient of superficial expansion = 2y Initial area of the...

A dipole lies on the X axis , with the positive charge q at x=d/2 and negative charge -q at x=-d/2 .i know that the electric flux through the surface in YZ plane (midway between the charges) will be zero .now this surface is rotated so that the normal to the surface is no longer parallel to the...

In an experiment I heated a room and logged the temp change as it went up. One of the walls in the room is made of plywood. I also logged the temp on this surface (on the heated side). When I looked at the graph after the experiment I noticed that as the air temp of the room went up, the surface...

Supposing I started off with a particle, which I know exactly the state it is in, hence, it is in a pure state. And hence also, its entropy is zero. Now, suppose we throw the particle into the black hole and be sucked in, then, then the area of the black hole increases and hence, the entropy of...

hey guys, just wondering if i did this correctly a spherical balloon is to be filled with water so that there is a constant increase in the rate of its surface area of 3cm2/sec . a) Find the rate of increase in the radius when the radius is 3cm. b) Find the volume when the volume is...

I have conducted an experiment in school I have some problem with it . I connect a resistor 6600 ohm to a 6V direct current and I read the miliammeter and it show about 0.9 mA . But after I connect a capacitor 3300 F parallel to the resistor , the miliammeter increase to more than 1 mA.Why the...

So in the case where the wave source is moving towards a stationary observer, the observer will observe a frequency f' where f'=f(v/(v-v[SIZE="1"]s)) f= frequency of wave v=velocity of wave v[SIZE="1"]s=velocity of source moving towards observer I understand that the increase in observed...

i have 3 questions that i need help with Consider 180 g of neon gas. How much energy would it have to absorb to experience a temperature increase of 12 K? Construct a PV diagram for each of the following. (a) A gas begins with a volume of 14 L under pressure of 3 atm. The gas first...

hi everybody how are you?:smile: this is the first time i write here , i hope i be good frind for you , & I'm sorry about my language , but i think I'm not very bad:wink: :smile: . i have a quetion about the special theory of relativity? Einstein sied" when the speed is increase the...

Driving along a crowded freeway, you notice that it takes a time t to go from one mile marker to the next. When you increase your speed by 4.0 mi/h, the time to go one mile decreases by 9 s. What was your original speed in mi/h? (this is from chapter 1 in my physics book, but it's been a long...

OK, I'll admit...I am only a beginner, if even. I understand why time and length are effected by speed. But I've never understood why mass increases. Would someone kindly show me how and why mass increases the faster an object goes (using mathematical language understandable by someone who...

hi, i was just wondering as the mass of the black hole keeps increasing due to increased mass getting deposited on it does its event horizon increase because of this? does the black hole have infinite density? -Benzun

http://news.yahoo.com/s/ap/20051125/ap_on_sc/greenhouse_gas http://www.abc.net.au/science/news/stories/s1516607.htm http://www.newscientist.com/article.ns?id=dn8369&print=true

Hello All I have this problem that I have no idea how to do. F = flux or the volume of blood to flow past a point R = radius F=kR^4 Show that the relative change in F is about four times the relative change in R. How will a 5% increase in radius affect the flow of Blood?? How...

Can someone explain to me the following: If a number increases from 108,7 to 113,7 how much in percent has it increased? First I tried to do 108,7 / 113,7 = 0,956. 1 - 0,956 = 0,0439. In other words, an increase of 4,39%. This turns out to be wrong. 113,7 / 108,7 = 1,0459 -> an increase of...

When two electrons move away from each other, does the potential energy of the system increase or decrease?

www.mybiopro.com/savefuel ... can anyone tell me if you can actually increase fuel efficiency by resonating gas, and can someone maybe send me some links (if you know any) that explain how these things actually resonate the fuel without any external power source. AND if they don't have a power...

Is it possible to have an INCREASING speed AND have the MAGNITUDE of acceleration decreasing? If so please give examples. I asked my TA this question today and she did not know the answer...? Help!

I *think* I remember hearing something about a study that showed just thinking about working out was able to increase muscle mass.. was this true?