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(a) without having the original image

(b) having the original image. The encryption starts from the first color code and the first pixel.

(c) having the...

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I would like to know how I could define an equation for α with given the two lengths of the rods and angle theta (θ). I sketched the situation below, the problem arises when the rod

Like to hear.

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I asked this question in a philosophy forum and got quite a bit of feedback but it didn't quite answer my initial question.

If there was an infinite ocean and I scooped a cup of water out of it, was anything actually taken/lost from the...

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I've a doubt about the application of the principle of relativity as follows.

Assume as principle of relativity the following statement:

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$$<\hat{n}>=<1|\hat{n}|1>=1.$$

For a two-photon number state, the similar calculation will be

$$<\hat{n}>=<2|\hat{n}|2>=2.$$

And for a coherent state, it is...

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I am an international student who is planning to apply for the Ph.D. in astrophysics in the US in the coming application cycle. I am aiming for the top astrophysics school in the US. For the top, I mean CALTECH, Princeton, MIT, Columba, JHU, Cornell ... e.t.c. I would kindly ask for...

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Here is the last page of part 5.

https://www.physicsforums.com/threads/random-thoughts-part-5.851969/page-134]]>

I got: ##\vec v = (5, 5*\sqrt{3})##

But it has been marked as wrong. Consequently, the rest of my calculations is not correct. Could you tell me, why?]]>

I was reading this article, https://science.howstuffworks.com/question456.htm, about firing a bullet from the back of train which is moving as fast as the bullet.

The following is taken from the article mentioned above.

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The requested page could not be loaded.

- Check your internet connection and try again.
- Certain browser extensions, such as ad blockers, may block pages unexpectedly. Disable these and try...

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When trying to solve it, I've...

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My understanding of space (not near any gravity and therefore no spacetime curvature) is that a body in motion will continue to move...

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trying a run I've got the following error message, and thus no output file since the run stoped by itsefl.

Please, has anyone encountered this error and would happen to know how to correct the input file ? (any hint help)

Thanks to all of you

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So we see clusters of meteorites as we fly through the path of dust, left behind by passing comets. The showers seem to be predictable and some of them have been...

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I have a question, I think the answer is no you can't do it, but I want to know why.

First mains supply - 3phase N + E (50hz)

Connected to this first supply is an inverter that gives out a 3 phase 415vac @60hz (no neutral) second supply.

The 60hz inverter output feeds 3 independent tapped...

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**My Attempt:** Here, I considered for 2 kg mass the resultant motion is zero, which means it's acceleration (a) would be zero. So, if we consider the Tension force from the 1.5 kg mass to keep 2 kg mass from falling is L, then 2×9.8-L=ma=2× 0 ⇒ L=19.6 N. But where does the tension...

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Could it be toleratable for not super expensive machines, structures?]]>

why is answer for (6a)6J?]]>

One I've noticed often is the idea that in 400 years or a galaxy far, far away, people in space ships will be pouring brandy. There is an obsession with booze in much of...

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For a student initially working on a more

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I have PlayStation(R) 2 gaming console on my house. It is considered legacy per today's standard (as there are new-generation PlayStation(R) 5), but still popular here.

One of games that I installed on the console is

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That is, it's obvious that the 1st Newton law in its original formulation is a corollary of the 2nd...

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So I was thinking a little bit about it and these are my...

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## \frac {du}{dx} = 2 ## simplified to

## du = 2dx ##

I keep seeing this done with the explanation that "even though ## \frac {du}{dx} ## is not a fraction, we can treat it like one". Why...

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Supposed that Raul was learning Korean, because he would like to work with BTS and BLACKPINK's agency, which requires fluency in Korean. And let's assumed that his mother tongue language is Indonesian.

After several months of courses and he adequately understood Korean, he decided to watch...

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Could you please point me to some good video courses on Physics for the High School level and generally of the introductory level?

What I could find meanwhile are: "How Things Work: An Introduction to Physics" from Coursera

and "Intro to Physics" from Udacity.

I am looking for...

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1. water hardness level, as I live in Florida, and I lodged at a Ritz Carlton also in Florida. I'm not, in any way, affiliated with any corporation herein. I'm not, in any way, affiliated with any corporation herein.

2. my eyeglasses with $700 USD Nikon SeeMax Ultimate...

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Thanks.]]>

I have a set of ODE's represented in matrix format as shown in the attached file. The matrix A has algebraic multiplicity equal to 3 and geometric multiplicity 2. I am trying to find the generalized eigenvector by algorithm (A-λI)w=v, where w is the generalized eigenvector and v is the...

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When writing the QED vacuum polarization loop, the numerator ,consisting momenta slashed + m from the fermion propagators and the two gamma matrices, has a trace over all of it...

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My wife just drew this

]]>

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https://www.amazon.com/dp/1108841767/?tag=pfamazon01-20]]>

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In my textbook, the Spanish 6th edition of "Calculus", by Robert A. Adams, at Chapter 3.2, Theorem 1 states:

If ##x>0##.

$$\dfrac{d}{dx}\ln{x}=\dfrac{1}{x}$$

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1) stay fixed to the moving body or

2) does it stay fixed to the inertial frame, yet still able to rotate as the body rotates with the only restriction that it cannot translate with the body i.e. only affixed at the...

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Turns out that Zoobyshoe beat me in posting about this in another thread, so he will officially be known...

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I am considering going back to university to...

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SE corner of Iceland. USGS doesn't show any earthquakes during the last week...

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Is it just me?]]>

The very talented 21 year old Norwegian singer and songwriter Sigrid:

]]>

Use the node-voltage method to calculate the power delivered by the dependent voltage source.

i1+i2+..in=0(KCL)

i=v/R

p=i*v

I posted the solution below, but I'm going to post my own workings, based on just the...

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i found current to be 2/5 A. then 2/5A multipled by 6s = 2.4C. and since one joule per coulomb is equal to the unit of p.d, i get 2.4J. I don't get 4.8J(supposed answer)]]>

I would like to calculate (roughly) how much torque is needed bringing the blue plateau in movement. Assume the blue plateau is loaded with 7.5 kg. The radius of the blue circle is 100 mm.

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I am wondering if one...

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We had a wind storm. We have a dumpster with a lid. On that lid we put a heavy brick to keep the lid closed during wind storms. It's worked great for years. But we had a very strong wind storm and it launched that brick quite a distance. I'm trying to figure out the wind speed that would...

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It seems that special relativity suggests time is like gravity and electromagnetism, not built into the absolute fabric of reality like logic and causation.

Yes, time is dynamical. The phenomena are dynamical and are labeled by what we call...

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1.

2.

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But such energy density would integrate to infinity due to...

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Unfortunately it seems that thread is closed before anyone pointed out...

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If you place a mass

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Let's say we have a wave function. Maybe it's in a potential well, maybe not, I think it's arbitrary here. This wave function is one-dimensional for now to keep things simple. Then, we use a device, maybe a photon emitter and detector system where the photon crosses paths with the wave...

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Today I learned that you clean...

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Wave functions lack trajectories, so do sets. Wave functions also distribute over areas, as sets can do. To my understanding, wave...

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Thanks]]>

Explain this definition...

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Code:

```
>>> a = 97
>>> type(a)
<class 'int'>
>>> bin(a)
'0b1100001'
>>> b = ord('a')
>>> b
97
>>> type(b)
<class 'int'>
>>> bin(b)
'0b1100001'
```

Is this means that the string 'a' and the integer 97 stored as the same binary in the memory ? If so then how can python tell the...

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Despite the global COVID-19 pandemic still carrying on (and even a recent fourth wave in Japan - host nation of the Olympics - that's seen some areas of the country placed into a state of emergency...

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to do the Cossack dance , in the first 8 seconds or so of:

It seems impossible for me to even move when I am in that position, in my knees, let alone being able to jump around while...

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I am looking for a reference which describe perturbation theory with two parameters instead of one. So far, I did not find anything on the topic. It might have a specific name and I am using the wrong keywords. Any help is appreciated.

To be clear, I mean I have ##H =...

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m(A)g sin 30 + μm(A)g cos 30 = 12.86 N

The force working with mass B is

m(B)g = 9.8m(B)

I thought I could solve for B using F=ma where 12.86 N = (2kg+m(B))*(0.58), but of course, 12.86 N is just the force required to make the...

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https://arxiv.org/abs/1706.08749

Ferruccio Feruglio

A modular form is a kind of two-dimensional analogue of the periodic trigonometric functions. Just as trigonometric...

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- You wouldn't understand the answer.
- Don't ask that question. Ask about a Riemann sphere instead.
- You're too lazy to look up the answer in [a GR textbook that I don't...

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$$ T=\frac{3}{4}\frac{Gmm'l}{a^3}-\frac{1}{4}\frac{Gm^2}{l^2} $$

the satellite is placed in a circular orbit of radius a>>l...

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$$\frac{\partial \dot T}{\partial \dot q} - 2\frac{\partial T}{\partial q} = Q$$

Below is my progress, and I got stuck at one of the step.

Now since we have langrange equation:

$$\frac{d}{dt}...

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I am currently reading Itzykson Zuber QFT book and on Chapter 7 where for the first time loops are considered. Particular method of dealing with divergences namely Pauli-Villars regularization is considered in section 7-1-1 considering vacuum polarization diagram. I do understand physics...

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