Hard Definition and 1000 Threads

Here’s the data is can supply. Water temperature entering ~51°C. desired water exit temperature ~38-40°C Water flow ~approx. 300L/min. Pipe Inside Dia.- 51mm Pipe Material- HDPE PN16 We would bury the pipe around 1 meter deep. Deeper is not feasible as the trenches would be hand dug in an area...

I want to know how hard is to get a Master's in Physics from SJSU. I am not a Physics major and I want to know if by attending this program will I be able to do other personal activities or is it likw I will just be studying all the time.

I think there are so far as we can tell particles of mass that are made up of quarks and leptons (electrons and what not). So far as we know those the fundamental particles of matter. Question - how hard have we banged on quarks/leptons to see if we can blow those up into smaller units? I...

I have tried ChatGPT, an artificial intelligence system, to ask hard questions. Me: What's the best interpretation of quantum mechanics? ChatGPT: Quantum mechanics is a fundamental theory in physics that describes the behavior of matter and energy at the atomic and subatomic scale. It is a...

I am looking for a formula that I can use to find out how high a steel rod or ball will jump up. If I hit mass M with force F how high will it jump up. If there is a program that would be great. every thing will be in pounds So if ball or rod of 10 lbs is hit on the bottem with 14 lbs of force...

How hard is it compared to undergraduate thermodynamics? Is it harder or easier?

I finished first four chapters of Gaskell Thermodynamics of Materials and finished all exercises. Those 4 chapters are: first law, second law and statistical interpretation and introduction. Can someone give me fun problems to solve on these topics. I am really having fun solving those problems.

So I have come up with my solution(attempt) which is: where ( $$\psi_ 1 \triangleq Asin(kx),0<x<L$$ $$\psi_ 2 \triangleq Be^{-sx},x>L$$ $$k \triangleq \sqrt{\frac{2mE}{\hbar^2}} $$ $$s \triangleq \sqrt{\frac{2m(V-E)}{\hbar^2}} $$) But this has a serious problem about boundary: I think...

Hi, I have to found the number of microstates for a gas of N spheres of radius r and volume v in box taking into account the reduced volume after each sphere. V sphere << V box. I'm struggling to find the microstates in general. I don't see how to find the number of microstates without knowing...

This is not a homework question. I don't know whether this is even the right place to ask, it is very vague. Lately, I have a nice pair of shoes that was stored in the bedroom without extreme temperature change or humidity change. I have it for like 20 years. A month ago, I took it out and used...

Trying to solve for the loop contribution when renormalizing a one loop ##\frac{\lambda}{4!}\phi^4## diagram with two external lines in ##d=4## dimensions. After writing down the Feynman rule I see that: $$\frac{(-i\lambda)}{2}\int d^4q \frac{i}{q^2-m_{\phi}^2+i\epsilon} $$ But I see no way to...

Considering I barely passed summer semester with embarassingly terrible grades (which was only 2 months long and exams are on campus and were binary multiple choice question meaning no partial grades so you either know it or you don't and there is no close in science) are as follows: Course...

Ontology is the easiest and the hardest concept in the field of quantum foundations. It is the easiest because even a child can understand it. When a child asks: "What is the world made of?", she asks about ontology. When you answer: "It's made of atoms" and when she asks "What does the atom...

How do we make hard metal toolkit handle from high density Polyethylene tube/pipe inside which the tool near end is united, glued by some material (black as seen for now, try to give pic. later on)

Hello everyone, ever since I was little I wanted to go into the research field, I have a bachelor degree in physics but I actually wanted to major in engineering because I am more of a doer and I enjoy experimenting with things on hand, but I had to major in physics because in my country (Egypt)...

as the process has been given as an adiabatic one, dQ=0, further attempt is given in the attached files, but the problem is I got X=1 while the official key states it to be X=2.05, could anyone explain why

https://assets.learnosity.com/organisations/154/a4840bb5-1a32-4997-8d1f-28992a862a2b.PNG

Apologies if wrong forum. Could not see anything about acoustics. Is this mathematics? Why's it so hard to get things like timbre right? Digitised instruments and voice changers don't always sound right. I had a chance to visit a recording studio. Was given a lengthly talk about sound from a...

I got 12/12 on the above part^ And as for the mathematical solution below I got 5/6 and then 2.5/3 for the conclusion.

I have the following DE, R'(t) = k*4*pi*R(t)^2, where R(0) = 5, and R'(0) =-0.001. I have attempted to solve it Maple, and would like to know if I have done it correctly?

Performing force balance on the two balls, I obtain ## T+\frac{4\pi}{3}g \rho_3 R_1 ^3 = \frac{4\pi}{3}g \rho_1 R_1^3 ## ## T+\frac{4\pi}{3}g \rho_2 R_2^3 = \frac{4\pi}{3}g \rho_3 R_2^3 ## from which I obtain ## \rho_3 = \frac{\rho_1 R_1^3 + \rho_2R_2^3 }{R_1^3 + R_2 ^3 }## and ## 2T...

I'm trying to find a motor that would break hard ground what would you recommend, here is my research so far: My research is based on horsepower its bad research but I thought it might apply to a motor since its s also this is under the asumption of a 3 pound hoe people managed to do a lot of...

Corona has come and it doesn't seem to go away that easily. Why can't modern science find some cure that will prevent so many deaths? Why for example we can't find an antibiotic for this specific virus? What about other approaches(vaccine)? I just wish a cure could be found so we may continue...

Ornstein-Zernike states that ##h(r_{12}) = c(r_{12}) + \rho \int d\mathbf{r}_3 c(r_{13})h(r_{32})## which after a Fourier transform becomes ##\hat{C} (\mathbf{k}) = \frac{\hat{H}(\mathbf{k})}{1+\rho \hat{H}(\mathbf{k})}## However, I don't see how to simplify this to the second equation he has...

Can you please help me ? I have tried to do it many times but I end up getting the wrong answer. Thank you in advance.

Can you please help me ? I have tried to do it many times but still got the wrong answer. Thank you in advance.

I saw rubber-like silicones. Are there types of silicone that can be used in injection molding and once the process is finished - become as hard as, let's say, PVC? At the same time they should have all(/majority) of silicone's properties (citing Wikipedia): - Low thermal conductivity - Low...

i going to do the online HNC mechanical engineering. its has 2 units mechanical principles and thermo. i was wonder how hard is it to learn those units and the maths online or with online tutor. i can do the maths if its inperson in class but learn on line I am not sure.

I just watched season one of Tales from the Loop. It has the mood of Interstellar on the Earth where people live quiet lives of desperation. There’s an underground physics lab nicknamed the Loop where the impossible becomes possible. There’s the people whose lives are affected in strange ways...

Hi, I was hoping to get some help on these five questions, I've been stuck on these and any help would be greatly appreciated! 1. Inflation rises and falls in a cyclical manner. If inflation is highest at 4.8% and lowest at 1.3%, what c for the equation y = a sin(k(x + d)) + c? 2. If the...

I was watching Jeopardy last night. In the Category "Magnet" was the following: "An 1845 letter from the 21-year-old future Lord Kelvin inspired this British scientist to show how magnetism & light are related" My guess: I was pretty sure this was wrong, based on the 1845 time frame, but I...

Hello, I have posted a problem (on math stack exchange) I was given for fun by an uncle, who doesn't know whether the proof is possible to establish. I tried my best and failed so far. I don't think I can solve the problem with my current knowledge and I would love to know if you can find a...

I believe momentum conservation is to be used in this sum since there's no external force, but I am not sure how to write the equation. Can someone please help me out:)

Hi! I have read that cometary nuclei have a very low albedo, even lower than coal or asphalt. Because of this, they absorb lots of light and heat rather than reflecting them. So I was wondering how hard is it to detect extinct comets. Could the solar system be full of dead nuclei buzzing around...

stuck on this question

Hello guys (and girls), I'm from Europe and I was wondering whether any of you know how hard it is to get into the top US CS PhD programs as compared to getting into physics. I think I've once read on Quora that getting into engineering is way harder since this area of research does not receive...

I’m a physics major currently in the second semester of my first year at a US university. I have recently become very anxious about my future with a physics degree. Don’t get me wrong, I love physics. One semester in, I’m doing very well academically. However, I’ve heard a lot of negativity...

In order to build a small mhd propulsion ship for a physics project, I'm wondering if the magnets we find in hard drives carry enough magnetic field power to function in such an experiment.

Can I use a brand new removed SSD HardDisk to store data without doing any thing at the beginning time(e.g without formating or other things)?I will use SSD to store ebooks(PDF,Djvu,epub,Audio files). Can I open books when I attach the removed SSD to laptop?

how high does a vacuum need to be for electron gun to work? for example, will 1 pascal work, will 1 tenth of a pascal work? is there a minimum vacuum for a electron gun to work?

This Wiki page I've been editing for months with stuff I've read on the internet. Based on existing science and tech already available in Star Wars, which of these would be challenging for a scientist in Star Wars to create? Try to explain why and you can pick multiple entries. Remember, Star...

I often hear that a certain behavior of an animal is "hard wired". I get the analogy, but what does that really mean in the brain? What two things are "wired" together and what is the actual "wire"? If a dog runs after a squirrel (dogs are of course "hard wired" to chase squirrels), are his eyes...

I'm having trouble processing math atm, I'm a perfectionist so each time I delve into a topic on my "self-study" I try to understand all of it. but that generally takes too long a time to focus on other "important" math stuff that actually matters right then like studying some trig stuff and...

Is computational Physics a hard major? To what extend I should learn mathematics and Computer Science besides learning Physics?

The exchange of soft Pomerons (and Reggeons) (##\alpha_R(0)=0.55## and ##\alpha_P(0)=1.08##) seem to describe total hadron-hadron cross sections pretty well in the Regge limit. See, for example: https://arxiv.org/abs/hep-ph/9209205 In this limit, QCD is of very little use since the exchanged...

Hi everyone. In 2017, I received a bachelors degree in physics. I liked the subject and wanted to go to graduate school for something more practical, so I did. A year ago, I failed out of a PhD program in engineering. I was the worst student at that point. I was too shy to ask questions in...

Summary: I've posted this in a few forums but still confused on this problem. If the plane is moving at 200km/h and the wind pushes the plane with a velocity of 85km/h, then the resultant velocity would be 217km/h, and using sine inverse, 217.sin(theta=85, I got 23°, which is B, but the answer...

I know this may be extremely basic to almost everyone on the forums, but I really can't tell if moon cycles are predictable or not ! like can we tell in advance when is the full moon ? I feel like the answer sould be a definite YES, but my confusion is based on what I see each year. I live in an...

Hi Everyone, I am currently working on a project where I am creating English subtitles for an Italian TV Series, for deaf and hard of hearing. There is one particular line I am struggling to hear and it is where one of the characters is talking about a type of physics. I wondered if anyone...

Homework Statement A person throws a ball up from a height of 1.5 meters, 3.23 seconds later, the ball hits the ground next to you. Find the maximum height the ball reaches. Homework Equations V=V(initial)+at The Attempt at a Solution This problem almost seems impossible without knowing what...