Generation Definition and 340 Threads

Calculate the time it will take to increase the cell number from 10^4 CFU/ml to 10^8 CFU/ml assuming a generation time of 1.5 hr. 2=e^ut where t is the generation time...solve for u. x=xo*e^ut where t is time For the 1st equation: ln2=lne(ut) ln2/t=u ln2/1.5=u u=0.46 l/hr For...

Hello everyone! So I'm working on constructing a simple mass balance for a cake. I didn't have any problems doing that, but I was asked about waste that is generated in the process of making the cake. Is there really a waste generated in this kind of process? I've also been asked to...

here I come with a question, maybe stupid. everyone knows about electrons, muons, taus. Is a heavier charged lepton impossible to exist? why does SM deal with three generation of particles (each consisting in a charged lepton, a neutrino plus two quarks), and not more? thanks everyone.

This came to me last night in a dream. I was wondering if anyone here can validate whether or not this idea is realistic or just nothing more than a dream? It may not be new but I haven't seen it anywhere else. I put together a simple drawing to explain it. See the link below. If anyone else has...

Hi, What crystal do I need to generate polarization entangled photons? I read BBO (beta-BaB2O4) crystal are needed but when I call the engineers at commercial companies and mention the term "entangled photons" it goes way over their heads and they just say they don't make this crystal. I...

Homework Statement Does a torsion module M imply M is cyclic? Or does it imply M is finitely generated? I think cyclic implies torsion module. What about the reverse? The Attempt at a Solution I think there is a connection but don't see it.

Homework Statement In Figure 30-52 (see attached), a metal rod is forced to move with constant velocity v along two parallel metal rails, connected with a strip of metal at one end. A magnetic field B = 0.370 T points out of the page. (a) If the rails are separated by 26.0 cm and the...

Hi, You can be sure that the method that I'm going to propose is of no commercial significance. Anyway, I'd like to know why. Set up(regardless of dimensions):- place two permanent magnets with like their like poles closest to each other in a linear tube and at the end of the tube...

Can anyone please suggest a comparative pro/con review of the various fusion approaches for power generation? In those approaches I'd include: tokamaks, stellarators, spheromaks, pinches (Z, focus, etc) -ICF laser, ion beam -Other inertial electrostatic Beam-beam FRC ? Obviously the available...

Homework Statement "Discuss the evidence for the law of conservation of lepton generation number. What is the evidence that neutrinos of different generations are distinct?" [8 marks] Homework Equations N/A The Attempt at a Solution I understand the concept of lepton generation...

I think I may have posted this in the wrong forum earlier :\ Homework Statement An insulated and initially empty 0.7m^3 tank is connected by a valve to a line flowing air at 50degreesC and 200kPa. The valve is opened until the tank is filled, and then the valve is closed. The insulation is...

Homework Statement An insulated and initially empty 0.7m^3 tank is connected by a valve to a line flowing air at 50degreesC and 200kPa. The valve is opened until the tank is filled, and then the valve is closed. The insulation is then removed from the tank, and a 20degreeC heat sink cools the...

Ok, doing a project at the moment and this is one of the issues I have to overcome; The information I have researched is as follows: If this is the case then a 88m diameter rotor should generate 2400kW? But the below diagram from the same page shows a 80m diameter rotor generates 2500kW...

Hi, Does anyone know of any free IDE that can generate C++ code from "drawing" in UML?

"Generation" of gold, silver, copper elements Since gold, and silver, and copper are all elements, I am a little confused - are they generated, or is there already only so much of each in the Earth, period? I know I found some data on Wikipedia that indicated that the various elements can be...

Are they really fundamental? I am under the impression a fundamental particle would be "Stable", i.e first generation fermions. Could second and third generation fermions be composite particles of first generation fermions? Specifically, since the 2nd gen lepton- muon decomposes rapidly into...

I always wondered what would happen if the sun suddenly stopped doing energy generation. i know that it would us 8.5 minutes to find as limited by the speed of light. or perhaps 10 million years to find out as that is how long it would take a photon to travel from the core to the surface...

Hello, I'm not an expert, hardly a novice, in physics but still had some thoughts which might be worth shooting at. The stable matter of our universe consists mostly of matter made of electrons and up/down quark based particles (generation 2), which is described in the standard model. The...

New Nuclear Power Generation in the US Announced! I posted about this in the Nuclear Engineering Forum, but this may signal the "Nuclear Rennaisance" in the US, so I'm repeating here for discussions on energy policy rather than technology...

hi, the way that sun generates energy is really impressive. as human we are trying to simulate the similar process, however there are two vital problems we have to overcome: 1: the necessary temperature for fussion: about 40,000,000 k! 2: the containment of the plasma.what do you think, could...

1.with the hot and cold fusion under experiment level now, would power from sound fusion provides equal or more power and economic value if it has been successfully researched? 2. what is the difficulty faced in building a commercial sound fusion generator? 3. Future of sound fusion...

i'm a lil confused bout whether we need the voltage and current to be out of phase or its something we just can't avoid..?

Rather than clutter the FEG thread, here's different idea along the same lines of renewable electrical power generation. Featured on "Discoveries This Week" on Discovery channel, the reps from this firm claim they can generate the power needs of CA from a 100 sq mile installation offshore, and...

Right now, my parents are angry at me because I won't eat with them. I'm just not hungry. I had a big breakfast and I haven't done any physical activity all day, so I have no need to eat more at this time. That doesn't matter though, they're still angry and being dramatic because I won't eat...

I am looking to design a few ‘wind powered’ gadgets, on a very small scale. I am struggling to calculate the power generated from a turbine of about 30mm diameter. I understand that the number of coils surround the armature has an obvious effect on the generation, but was wondering if there was...

As part of a science project, my professor is having us come up with an original way of producing electricity, with an emphasis on new frontiers and space travel. Here's what I came up with. It occurred to me there must be a way to exploit the temperature difference between the base of a...

Hi, I am from the uk and very interested in home power generation. I am aware that there is a system that you can install in the home which will 'sell' excess power back to the grid if for example you are running a wind turbine which produces more electricity than your home requires...

See http://www.arxiv.org/abs/physics/0510071" excellent paper on the latest technology research on using tiny pellets of DT to yield explosions in the 100 ton range. Also includes brief but illuminating discussion of earlier nuclear weapons, from an international standpoint.

Does a device exist which can generate microwaves using heat (e.g. hot air) as a power source?

I give to you, the apple iSuck:

I recently read an article where the author stated that the momentum transferred to the air by a passing wing will eventually strike the earth, even from a high cruise altitude (in other words, out of ground effect) I have a problem with this for the following reasons, feedback would be...

I have read a number of the forums on lift generation, and I would like to add some comments for feedback. I read the forum describing lift as the centripetal force required to curve the airflow (streamlines), and I must say this makes absolute sense, I myself have always believed that...

In the Milky Way?

How can I find the rate at which heat is generated in the resister in an electric circuit connected to a 40-ohm resistor that is embedded in a .20 kg solid substance in a calorimeter. The external portion of the circuit is connected to a 60-volt power supply. I calculated the current and it is...

Can anyone tell me how dynamical mass generation works ? what is effective mass? thanks in advance matt

How does dynamical mass generation works ? In QFT-textbooks, the process of dynamical mass-generation is often used. For example one gets an effective quarkmass as a solution of the Schwinger Dysonequation. This mass is dependent on the quarks momentum.The effective quarkmass as a function of...

can someone help me with dynamical mass generation? In QFT-textbooks, the process of dynamical mass-generation is often used. For example one gets an effective quarkmass as a solution of the Schwinger Dysonequation. This mass is dependent on the quarks momentum. The effective quarkmass...

Hi, I am unsure which forum is most appropriate for this query but i'll start here. I am interested in building a device which works on the principle of using a stationary bike to drive an electrical generator to produce electricity, and, if practical, store it efficiently. Ultimately the...

It seems pretty much a given fact that the next generation reactors after the current nuclear fission reactors will be nuclear fusion reactors. What will be the source of energy for the next generation giga, tera and petawatt reactors? Reactors which use the strong nuclear force like a...

Regardless of our particular views on science, religion, philosophy, every one of us (I include myself) seems to be convinced of a belief which, I'm afraid, lacks any substantial support. That would be the belief that we are the first generation of humans who are not deluded about the simplest...