Code (Matlab M):

struct contents reference...

struct contents reference from a non-struct array object]]>

I have 4 groups of data four different locations. In each group, there are 3 columns of data showing the temperature at the location. Each location is at a different height (altitude). Each column shows a temperature recorded...

Hypothesis Testing]]>

EPR before EPR: a 1930 Einstein-Bohr thought experiment revisited

"In this example, Einstein presents a paradox in QM suggesting that QM is inconsistent, while Bohr attempts...

Einstein-Bohr "photon box" debate and general relativity]]>

STEM Bibles List]]>

Joint Probability Question Help]]>

Which of the following combinations would act as buffered solutions?

a. HCl and NaCl

b. CH_3COOH and KCH_3COO

c. H_2S and NaHS

d. H_2S and Na_2S

none really... The acid needs to be weak and the...

Which of the following combinations would act as buffered solutions]]>

Could someone please expand on this, or indeed correct me. In what way does an observed particle behave differently to a particle that isn't being observed by somebody's consciousness?]]>

|a| = 2

|b| = ## \sqrt3##

|a - 2b| = 2

Angle between a and b

##\theta## is angle between a and b

So angle between a and -2b is 180-##\theta##

##|a-2b|^2## =...

Find the angle between 2 vectors]]>

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Li = Lf

L = I*omega

K = (1/2)*(I)*(omega)^2

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Given that there are no non-conservative forces in...

Angular momentum with large wooden turntable]]>

A DVD-writer question]]>

Two spin ##\frac 12## particles form a composite system. Spin A is in the eigenstate ##s_z = + \frac 12## and Spin B is in the eigenstate ##s_x = + \frac 12## What is the probability that a measurement of the total spin will...

Composite Spin 1/2 System Probability Question]]>

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Beam problem

Deflection

Statically indeterminate

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Am I correct? Or should the assumed deflection at B...

Statically indeterminate beam problem]]>

Basic trig questions]]>

Which of the following states answer to an appropriete number of sig figs?

A 8.543x10^3

B 8.5x10^3

C 9x10^3

D 8.54x10^3

Multiple choice on uncertainty]]>

Dark energy = cosmological constant, any problems with that?]]>

Hey guys,

I am preparing a technical exam and am facing an exam problem below:

Ni is electrodeposited from an aqueous sulphate solution that has a composition that fluctuates from 1 to 0.01M due to changes in the feed...

Problem about Nitrate electrodeposition]]>

This is a day for the memory firstly for the memory of those who fought and the many that gave their lives in defending the freedom from tyranny during the WW1.

Secondly, it...

ANZAC Day memorial]]>

What cases of this happening do you find most notable, what showed that the hints were...

What false hints of new physics were most notable?]]>

Have you every heard of hip adductor release surgery? If so, how? Know anyone who has undergone the surgery? Any idea if this is well-known among MD's who would diagnose the issue?

Thanks!]]>

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F = k(q1q1/r^2)

K = (mv^2)/2

I got number 18 easy enough, number 19 seems simple but I'm not getting the right answer. I'm...

Velocity of]]>

So since I have to take an MRI, I am curious to know how it works, I think I know the basics but the information about it out there is rather confusing.

So first off here is what I know. A large cylindrical...

MRI physics question]]>

"Classical Physics Is Wrong" Fallacy

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...

"Classical Physics Is Wrong" Fallacy - Comments]]>

What exactly is a "rare event"? (Poisson point process)]]>

If a dielectric cylinder, say radius R, is placed with its axis parallel to a uniform electric field. What effect will it have on the field? Picture is included which makes it a bit clearer

Effect of a dielectric cylinder parallel to an external field]]>

And if the is a specific example for this?

Many thanks for any thoughts!]]>

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Thanks!]]>

A spring of mass “m” is put on a launcher elevated at “θ” degrees above the horizontal. It is pull back a distance “x” and launched at a target that must travel vertically “dy“ and a horizontal distance of “dx”. The spring has a...

GRADE 12: Energy, Springs and maybe momentum/collisions?]]>

I have one of these propane heaters:

View attachment 224632

As months go by, it has an increasing habit of spazzing out.

It will frequently do this in a strong gust. But with even a little wind, and more often when it is set on low,...

Propane heater behavior]]>

or

a job that i love ?

The job that i love will not make me poor or something but the thing is that i will never be able to buy expensive cars...

Job Selection Criterion Money]]>

If I want to find the difference in velocities of 2 objects A and B

We know the sum of their velocities is A + B

But but is the difference B - A

Why not A - B?

This is from the equation of...

Differences in velocity conceptual question]]>

A thin spherical shell is sliding with velocity ##v_0## on a table initial until friction eventually causes it to roll without slipping. Find its translational velocity when the it rolls without slipping as a fraction of...

Find the velocity when the ball rolls without slipping]]>

This question is motivated by a small calculation I am doing on polarization of bodies in external electric field.

What I wanted to do is this:

1) Mesh the region

2) Prescribe uniform (and non-changing) positive charge distribution

3) Prescribe (initially) uniform negative...

Thermodynamic energy and Hamiltonian]]>

Question: In unit-vector notation, what is the net gravitational force from them on a central sphere with mass m5 = 2.90 g?...

Finding the net gravitational force with Vector Notation]]>

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f=ma

v^2/r

Σf

Σf

FN = mg/sin(θ)

(mg/sin(θ))*cos(θ) = (v^2/r)*m...

Find the radius of the circle for this airplane]]>

A = f(!x)e

Vector Potential of a Toroid]]>

Let A and B be sets and f:A->B. The function f is said to be onto if, for each b ϵB, there is at least one a ϵ A for which f(a)=b. In other words, f is onto if R(f)=B. A function which is onto is also called a surjection or a...

Definition of surjection]]>

The Human Cost of the Pressures of Postdoctoral Research

While...

Postdoctoral Work Stress and the Human Cost]]>

The initial state of 0.1 mol of an ideal monatomic gas is P

Thermodynamics - temperature, pressure and heat]]>

Currently I am focused on Section 3.2 Exact Sequences in ##\text{Mod}_R## ... ...

I need some help in order to fully understand Definition 3.2.2 and Proposition 3.2.3 ...

Definition 3.2.2 and Proposition 3.2.3 read as follows:...

Split Monomorphisms ... Bland Defn 3.2.2 & Propn 3.2.3 ...]]>

Say we have particle ##A## and particle ##B##. Both particles can be in either of the two states that we call ##|\Phi>## and ## |\beta>## or in...

Two particle system, products and entanglement]]>

Watching the Earth from Mars]]>

According to this article,metals are good reflectors at low frequencies.What about at high frequencies like visible or UV spectrum?Will this show deviation]]>

Question: (a) If the probe is launched with an initial kinetic energy of 5.0 x 107 J, what will be its...

Finding Kinetic Energy with the mass, radius and initial KE]]>

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I've spent so long trying to solve this system of equations with my...

Friction Problem Statics]]>

(a) Explain how heat is lost from a hot surface to the surrounding air.

We will assume as there has been no other stipulation that the effect of radiation is negligible and thus we are...

Heat Transfer II -- How heat is lost from a hot surface to the surrounding air?]]>

Here is the last page of part 5.

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

Proof that BB(k) grows faster than any computable function]]>

1) How do we go about finding the keys when joining , say, 5 tables at a time? Does one do a database diagram using those tables?

2) I am having trying to set up the diagrams for these...

Large Joins in Large Databases -- How to find Keys?]]>

Why do the left wheels of a car rise when it takes a sharp left turn (that is it lurches towards the right)?

$$a_c= V^2/R$$

I started by imagining the car as...

Tyres of a car lifting when turning left sharply...]]>

Cloud cropping/plureite sensors]]>

Remnant Magnetisation varying with input amplitude]]>

I have an air wound 0.736 mH coil in series with a 3.5pF capacitor being driven with a function generator. Ideally the series resonant frequency should be around 3.13 MHz. The internal impedance of the function generator is 50 ohms or so. At resonance the voltage across the cap should be...

Voltage Monitor]]>

Here is my proposal: Let us feed the machine with a big sample (containing, say, a million numbers) of prime numbers and a big sample of...

Challenges for artificial intelligence]]>

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Simple circuit, 1 bulb and X amount of batteries. So...

How many batteries does it take to light this bulb up?]]>

Research Proposal For Senior thesis - GR Solar System Model]]>

I have to solve a problem about crystal symmetry, but I am very lost, so I wonder if anyone could guide me.

The problem is the following:

Using semiclassical transport theory the conductivity tensor can be defined as:

σ(k)=e^2·t·v_a(k)·v_b(k)

Where e is the electron charge, t...

Crystal Symmetry Problem]]>

Question attached:

View attachment 224316

below

I have completed this question and the needed commutator relation is that...

Multi-particle QM]]>

Hi,

So I have a perfectly insulated rectangular plate and I trying to use the 2D heat equation in conjunction with numerical finite diference methods and MATLAB to see how the temperature changes throughout the plate. My issue...

Modeling a Heat Source]]>

My query is that...

As one can see that in the IF response curve the picture carrier is placed 6db down the amplitude curve. Such a placement modifies the output of video detector in such a way that the picture carrier lies at half point or 50 % of the total amplitude.

Now this whole...

6 dB of IF response curve...?]]>

Then put two fingers in front of one eye, so as to look through the crack, and squeeze the light to zero very gently. ... Also you will notice, if you are very careful, side maxima, a lot of fringes along the edges too. Furthermore, the whole thing...

Fringes observed between the fingers]]>

However, I'm not sure how it works. I thought that the light entered the slit, diffracted from the CD (because the tracks in them are comparable to the wavelength of visible light) and then we observe the different...

How does this spectroscope work?]]>

If you have an object say in a vertical pipe, which only has a gravitational force acting on it would the reaction forces only be friction forces?

If this is the case how would you calculate the forces? would you calculate the...

Can the only reaction force (to gravity) be friction?]]>

Sorry for my "noob" question i am a 3D designer just looking for some more knowledge

Thanks in advance]]>

One of my wheelchair motors overheats and stops working]]>

Question: Ignoring Earth's rotation, find the change in your weight if you were to ride an elevator from the street level, where you weigh 708...

Finding the change in weight from the force & difference in height (y)]]>

Suppose that I have some cells that produce a...

Propagation of Error when Taking the Average of Averages]]>

Statistical mechanics and the weather]]>

In this webpage:

https://onlinecourses.science.psu.edu/stat503/node/35

it describes the 2^k factorial experiment design. I understand that k is the number of factors that we are investigating (in this case two, a and b), 2 are the levels of each factor (+/-) and 2^k=4 is the...

2^k factorial experiment design]]>

A cylinder with radius ##R## and height ##h## which has a distributed charge on its surface with density ##\sigma## spins over its axis with angular velocity ##\omega##.

If the cylinder has a mass density ##\rho##, find the...

Finding the relationship between magnetic momentum and angular momentum]]>

Sorry if this has been covered before but I have been searching the forum looking for the exact information and have been unable to find it. I am currently carrying out a project to make a Honda GX35 engine suitable for competing in the Shell Eco-Marathon where I will perform...

Plotting a Power Graph using Torque & RPM]]>

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Energy band diagram equations.

This is more of a conceptual question, but this is the problem I am working on for reference. What...

Semiconductors - Flat band Diagram vs Equilibrium Diagram]]>

If my description is correct

How long the burst last?

How many...

How long is a photon?]]>

if we measure a particle's position at time X (not caring about its momentum) and we measure it again at a later time Y and we find...

Heisenberg Uncertainty vs Measurement Error]]>

"Using the relation

Cohen-Tannoudji Exercise]]>

How does plasma act outside of a containment field?]]>

https://www.forbes.com/sites/lizrya...out-why-nobody-wants-to-hire-me/#bc7fb028866f

In my years spent on this forum, I have noticed that topics regarding perceptual motion are often brought up, sometimes indirectly. In many cases these posts are based on false theories bordering on "crackpot" level thinking. In others however they are posed in a "why is this not...

Thoughts/Questions on the ban of free energy discussion]]>

View attachment 224416

m:mass of solid cylinder

T: tension in string

w:angular velocity

m(g-a)=T

mg-ma=T

a=v^2/r=w^2r

now what?]]>

The court said the monkey lacked standing because the law does not explicitly say animals...

PETA and Monkey Finally Lose Copyright Suit]]>

I'd like to get some points on this.

Firstly, by a non...

Non inertial frames in SR?]]>

2) Also how would it be possible to introduce vacancies in crystal growth ? I have heard of

things like ionic...

Regarding Home Lab made to study crystallography]]>

I'm reading "Beyond The Cosmic Landscape". Perhaps out of date, but a very understandable explanation of QED.

Am I right to deduce that the air which surrounds us is jam-packed with electrons emitting photons?

Thanks...]]>

Advice on Minor in Math or Physics]]>

Our Beautiful Universe - Photos and Videos]]>

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Pseudo Random Encryption?]]>

I am developping a Python (/Pyomo) package for simulation and optimization of some industrial processes.

I want to create global (simplified) models for heat exhangers (and more) and avoid differential equations.

(to decrease the number of variables of the problem)

Most often the...

Heat exchanger and the second principle]]>

Why do rockets turn horizontally so soon after launch?]]>

Yesterday the first beams this year circulated in the LHC. As every year, the machine operators start with a single low intensity bunch, checking that everything still works...

LHC starts data-taking in 2018]]>

How to hook up my PC to my TV]]>

Differential Geometry Book]]>

Prof. Syed Ayaz Ali Shah Bukhari]]>

Is there a log on my modem for all the devices that have been in my home, attempting to connect to my Wi-Fi?]]>