Explain Definition and 1000 Threads

Can someone explain? When two charge moving as fast as possible , what force is acting on for blocking to collide.I mean if you think you are not moving and you are looking 2 charge which are moving as fast as to near light speed, they must collide each other if charge is not increasing...

Hi I have been reading some internet articles that state the Bernoulli equation does NOT explain the Magnus Effect. The articles state that the effect is due to circulation (Bernoulli requires inviscid flows) Could someone explain the cause of the Magnus effect without reference Bernoulli's...

Homework Statement (I) Explain what is meant by an 'overall heat transfer coefficient'. (II) Explain what is meant by fouling and what its effect will be on the value of the overall heat transfer coefficient. 
 Homework Equations None provided. The Attempt at a Solution (I) The overall heat...

Ok all you bright boffins and I don’t mean an insult , I want to run this by you all so be tolerant and don’t turn off my blog until you have read through it please , I am wild camper in uk north east England mainly Teeside area for your expertise on what I have seen in the sky at night . No I...

Progress This is the experimental data of thermal conductivity of stainless steel 304L at low temperature. The data is calculated with the Fourier's law of thermal conduction. I checked many times in the excel file and I confirmed that there is no mistake in the calculation. The parameters are...

I'm reading a book called Godel, Escher, Bach, and the author is talking about formal systems, in particular, primes and composite numbers. He goes on to mention that "There exist recursively enumerable sets which are not recursive". I don't understand the term "enumerable" though. The...

When we do the stretched rubbers he etc analogy of gravitational well, there are two differences 1) the ball moves into depression because of gravity of the earth. 2) stretched rubbersheet is physical and prevents ball from falling down while space would allow you to move anywhere as space...

Homework Statement You are applying for a ##\$1000## scholarship and your time is worth ##\$10## an hour. If the chance of success is ##1 -(1/x)## from ##x## hours of writing, when should you stop? Homework Equations Let ##p(x)=1 -(1/x)## be the rate of success as a function of time, ##x##...

Hi. I ask in advance that you forgive me if my questions are poorly made or are irrelevant. Is the next. 1. Words that are frequently applied to parts of theoretical physics. Formulate. To imply. Explain. Are they interchangeable, that is, can any of them replace one of them in a phrase? Or...

Can someone please explain how the author, Domino Valdano, derives the percentages explaining quantum entanglement? The original post is by Thomas Ulrich. Any help would be greatly appreciated. first click on my link posted here, then once in it just scroll to the bottom of the post and...

Why do we need the theory of dark energy? I know the it is claimed that dark-matter has no affect on the electromagnetic spectrum. How do we know the affects attributed to dark-energy aren't affects caused by dark-matter? Dark-energy is claimed to be causing the universe to expand at an...

According to various sources, the Moon is separating from Earth 4 cm every year. I’ve searched for the explanation and I’ve found the following: The friction the seas and oceans from the Earth make with it’s soil causes the Earth’s rotation to slow down. This causes the Moon to speed up...

My teacher says I have to solve all the limits at once, but I don't understand why it is mathematically incorrect to solve one limit before the other. The test is here:

I don't understand how this equation came about and what μ means. And from there they said that μ=Δm/Δt=constant I have to use it to solve a problem about finding the final temperature of two liquids. I tried to google the equation, but I couldn't find anything. Can someone please explain this...

Hello to everbody can you help me how come C6 to be 10p and c5 13.5 and and l1 to be 190n and L6 240n i start with 100Meghz, with one circuits 50/XL or 50/XC now become three different thanks i understand the first circuit, i understand the second circuit, but now they make three circuits how...

hi guys i am struggling to understand how and why quantization of energy solves the UV catastrophe and the black body problem ? and how they get to the Rayleigh - jeans equation in the first place ? and why plank modified the equation the way he did ? and why should the harmonic oscillators...

Homework Statement Hello Everyone, a pleasant good morning to all :) I will attach an image that shows a diagram of a circuit. The question based on this picture is as follows: ''When switch S is closed, the Lamp L, lights. Explain how this occurs.'' Homework EquationsThe Attempt at a Solution...

Please explain the above limit problem.i am able to understand last steps but can't get initial 4 steps.

Hi, I'm slightly confused with the Aguirre-gratton model, and was wondering if someone could explain using simpler terms? I have read from : http://www.preposterousuniverse.com/blog/2007/04/27/how-did-the-universe-start/ " Aguirre and Gratton have presented a proof by construction that such a...

This is a bit of a philosophical/conceptual question. I've done tons of reading on it, of course, but haven't found anything that makes me go 'ah ha'! I am working steadily through the mathematical formalism of differential geometry, but am struggling to grasp how the things we say in this...

Superconducting Ring In a superconducting ring does the contraction of space between electrons cause them to move inwards? Like in this animation. Force Between Parallel Wires With Current In the proton frame of two parallel wires with identical current, I've been told they attract and this...

So- I'm going to confused with the concept of total mechanical energy that's loss due to work other. I provided an example below. When do I apply this equation of Wother=E2-E2? I get confused cause I thought frictionless meant that energy is conserved.

Homework Statement Show that any geodesic with constant ##\theta## lies on the equator of a sphere, with the north pole being on the ##\theta = 0## line. Hence explain why all geodesics on a sphere will be arcs of a great circle. Homework EquationsThe Attempt at a Solution I've had a go at it...

Homework Statement Two forces are acting on a 4.87-kg object that moves with acceleration 5.47 m/s^2 in the positive y-direction. If one of the forces acts in the positive x-direction and has magnitude of 12 N, what is the magnitude of the other force in N? Homework Equations F=ma The...

Is it correct to consider a given macroscopic object as a continuum arrangement of harmonic oscillators, each composed of a point mass? Would the error in such a consideration be too large?

I assigned a question: Explain the physics mechanism that results in the buoyancy force. Some students replied: The floating object is interacting with the water. Therefore it exerts a downward force on the water. The water then exerts an upward force on the object due to Newton's Third Law...

While looking at stereo ahead images some shots look like there is a massive sphere that appears and disappears in the camera example of this can be found here : http://www.dailymail.co.uk/news/article-3953058/NASA-cameras-capture-huge-blue-spherical-object.html as you can see the sphere appears...

I do not really understand why we don't include 7Ω resistor in step 1, and I need some explanation with step 2.

I am Professor of Inorganic Chemistry of the State University of Southwest of Bahia - UESB. I have a PhD from UFMG in Natural Product Chemistry. I use the polarimeter in my experiments and would like to understand what happens on a micro scale (chiral molecules) to provide the phenomenon of...

See the attached image. This circuit seems simple enough, but the fact that the voltage drop across each of the resistors is not the same means that equivalent resistance methods cannot be applied. Is more information required? Thanks for your help!

Homework Statement A circle of C of radius b rolls on the inside of a larger circle of radius a centered at the origin. Let P be a fixed point on the smaller circle, with initial position at the point (a, 0). Homework Equations x = (a-b)cos(θ)- bcos(((a-b)/b)θ) y = (a-b)sin(θ)-...

Someone showed this to me, and I'm struggling to explain why this perpetual motion scheme is impossible. A picture: Basically, this is a cylinder within a large reservoir, with water at the level of the reservoir water level. The mass would be dropped and then reach the bottom of the cylinder...

A bomb explodes on Mars how long will sound waves to travel from Mars to earth?? Ans= 0sec?? or any other answer needs only little hint

So far in my reading of SR, we explore various consequences of c being a constant in a vacuum and frame invariant, etc. At what point in a physics education do you learn why a universal speed limit is necessary at all? Is that the sort of thing that is revealed in an intro to GR course? Or is...

Homework Statement Discuss how Newton’s Laws can be used to explain the introduction of transportation safety features such as: Speed Limits on curved ramps Homework Equations Newton's 2nd Law: F=ma The Attempt at a Solution I believe that according to Newton's first law objects that are in...

Having trouble with understanding this equation and its theory.

With NASA defining this equilibrium density at 9.9 x 10<30 gm/cm3, how can an increasingly expanding universe maintain a steady density as it expands?

Can anyone explain the behavior of light I came across as I sat in my lounge this evening having a nice cup of Mocha . Hint ( I am sitting in a room with some led ceiling lights on) can you: 1.Guess how many Led lights I have on 2.Explain the appearance of light which is looking like a typical...

Hi , just curious about the F.B.D of a pebble moving in a vertical circle, which component that balances the weight of the pebble at the horizontal position , as tension is providing the required centripetal force , weight is acting downwards , which component balances it ?

This paper https://arxiv.org/pdf/1705.06859.pdf says that PBHs were the start of galaxy formations at up to Z=10 what do you think? In this connection a natural idea may come to one’s mind, that the SMBH are not created in the galactic halos but, vise versa, galaxies are formed around the...

Homework Statement http://imgur.com/a/Y8NW0 Basically we start with a function of t, which was differentiated twice, that function = F_o / m Fo is a constant force, and I assume m is mass though my book doesn't state that. Homework EquationsThe Attempt at a Solution Integrating the...

Homework Statement Homework Equations This would be the part I think I'm missing The Attempt at a Solution In the fourth line, Ix, where is the justification for multiplying 1/3 by the first term? I believe they are using the center of inertia of a rod, which is mr2 and the first term...

Homework Statement Homework Equations The equations are all given The Attempt at a Solution This isn't really a homework question... it's solved, but I'm having a hard time following it. I don't understand where the first term: -a(kaθ) comes from. I can see it's the moment relation...

Homework Statement Homework Equations The Attempt at a Solution This is a solved question. The answer is given above. I can't understand why h1=h2. [/B]

Hi all, I have a problem. I switched my major nearly two years ago within Engineering, however my university only has one course code for our entire degree which enlists all majors within it. So my issue is that they list ALL of my classes in my academic transcript and weight them all a whole...

The following is quoted from British Standard 6891:2015, the standard for the installation of domestic gas pipework: "In the UK, the Reynolds number is taken to be equivalent to: 25 043 x Q/d for natural gas; and 83 955 x Q/d for LPG." [Q = flow rate, cubic metre per hour, d = pipe...

I = 1/2 ρ v ω2 A2 I don't know what "I" is nor do I know what "A" is but it has to do with sound waves. May you also please correct me if I am wrong but is: ρ = density of air v = velocity of sound = 343 m/s ω = angular frequency of the sound wave = 2πƒ And also may you please answer what is...

Homework Statement and in this case we have, [PLAIN]http://tutorial.math.lamar.edu/Classes/CalcII/ConvergenceOfSeries_files/eq0016MP.gif[PLAIN]http://tutorial.math.lamar.edu/Classes/CalcII/ConvergenceOfSeries_files/empty.gif Homework Equations I can not see how they get either of...

Quantum zeno effect states that an unstable particle can be prevented from decaying by being observed/measured. It has been experimentally proven. However, this observation/measurement does not refer to simply looking at it. This effect vanishes as we zoom out to the macroscopic world. Hence, a...

So I did this lab on momentum on jets and the theory is that "a force is applied on the plate due to change of momentum" the jet both impacted on a flat plate and on a hemispherical plate; now i understand that the greater the angle of deflection of the water jet, the greater the change of...