Recent content by Perses

Homework Statement Hello everyone, I'm a bit stuck on this particular problem and i was hoping somebody could give me a couple tips or hints! "consider a linear monoatomic chain where all atoms have a mass M except one which has a small mass m. The force constant is C." First I'm asked...

Try looking at it again from the beginning. Q = (integral from Ti to Tf)mcdT What does this mean? What are you interested in finding and how can this help you? I'll tell you that what you've done for calculating heat won't be very helpful. So scrap that, you have the right idea to look...

Here is the formula for work W = -(integral)PdV This refers to the external work done on the system, not the work done by the system(this is what used to confuse me). If the work is positive, this means that the external environment is doing work on the system. When the work is...

(delta)Mg(zb-za) is supposed to be the potential energy component of the system. And (delta)Ub is the increase in internal energy of the gas in the fixed volume What i thought is that i could let W and Q go to zero and that the system stops flowing when the pressure in the cylinder equals...

Hello; I'm having a bit of difficulty with a problem here; Compressed helium, supplied through a throttle at a pressure of 10 bar and a temperature of 350K, is used to charge a 5 litre gas cylinder. Initially the cylinder contains helium at pressure of 2 bar and a temperature of 290K. Given...

You need to show if it is independent or not to find the basis and consequently the dimension. The first equation is ae^x + be^2x = 0; which you know. To find another, try differentiating the equation and then manipulating these equations to isolate for one of the two terms(ie, e^x or e^2x)...

Ah, yes! thank you very much. What a dumb mistake! Anyways; i was wondering if anyone could give me a starting point with this next problem! This is the question that the problem i'mhaving trouble with refers to. I can do this one easily: two cylinders, each containing an ideal...

Hello; I'm having some difficulties with a thermo question of mine. at low density water vapor conforms well to the ideal gas equation provided the temp is higher than about 320K, but the heat capacity is a function of temperature. The following formula gives the specific heat capacity at...

any help anyone could offer would be appreciated, thnx

I'm having a bit of trouble finding a place to start in one of my optics questions. I have to find Bessel's method for focal length of a lens. Any pointers on where to begin or a general direction, that would be greatly appreciated! Here's the question: A thin lens is moved along the...

Thnx alot I'm having a bit of trouble with another problem To determine the refractive index of a transparent plate of glass, a microscope is first focused on a tiny scratch in the upper surface, and the barrel position is recoreded. Upon further lowering the microscope barrel by 1.87mm, a...

I'm having some trouble with a couple of Optics questions, any hints would be much appreciated! THe first quetion states that a concave mirror forms an image on a screen twice as large as the object. The object and the screen are then moved such that the new image produced is 3x's the size...

Ah, thank you guys very much. I had thought that the moles had changed, but i didn't think about taking the integral; i was instead trying to find dQ.. how stupid of me. Thanks again!

Hello, I was searching the web to find some information to help me solve a problem and i came across this forum. I was wondering if anyone would be able to help me with a homework problem I'm having. On a cold day, where the outside temperature is 10degreesC, a room in a house is being...