So I started by reinterpreting the question into something more tangible. Is it true that this problem is equivalent to the following? Suppose that...

Prove that elements of x^i 0<i<n-1 are distinct]]>

$$A + A → I$$

with ##R = kC^2_A##

I'm assuming it takes place in a Batch reactor so the mass balance should yield:

$$\frac {dC_A} {dt} = -2R = -2kC^2_A$$

But, as I recall (I should be wrong though),...

Question about simple kinetics and stoichiometry]]>

If the Universe’s Mass was 100 At the Moment of the Big Bang...]]>

- Things that are possible can become impossible (example: heat death making Boltzmann brains formation impossible)

-...

Boltzmann Brains]]>

I have a question. Consider an electron in a shell of an atom has energy as 1.0ev and in the next shell it energy should be 2.7eV and the further next level energy is let's say 3.1eV. Means an energy gap of 1.7eV is their between first and second level and an energy gap o 2.1 eV is...

What an electron in an atom will do when given more energy]]>

You gradually apply a force to a 10. kg wood block on a wood table. What will the applied force on the block be once it is moving? The coefficients of static and kinetic friction are 0.5 and 0.3, respectively. The acceleration...

Friction force problem]]>

Soccer Ettiquette Question: Giving the ball back to the opposition]]>

Breath Control and Blood Pressure]]>

Consider the reaction : A⇔2B (⇔ stands for reversible). 1 mol of A and 2 mol of B are taken in a closed container at equilibrium. Suppose the pressure is increased, how much of B (by moles) will decompose to restore equilibrium...

Chemical equilibrium vs pressure]]>

Image charges]]>

Griffiths' Introduction to Electrodynamics problem 2.10, View attachment 227262

Gauss' Law, ##\int_{S} \textbf{E}\cdot \textbf{dS} = \frac{Q_{\text{enc}}}{\epsilon_0}##

Electric Flux through the Face of a Cube]]>

Specifically he has...

Contoversy about NASA's Asteroid Tracking]]>

Voltage vs charge?]]>

View attachment 227265

I believe that ##\frac{\partial x^u}{\partial x^p} =\delta ^u_p ## (1)

##\implies ## (if ##\delta^a_b ## is a tensor, I'm not sure it is?) : ##\frac{\partial...

Delta/metric question (context commutator poincare transf.)]]>

These transients are from driving things like a car ignition coil, for making an electric fence energiser. Simply replacing the LM358 gets it going...

Selecting an MOV for a power supply]]>

Stretch forming

A 38.1 cm-long sheet with a cross sectional area of 3.2258 cm2 is stretched with a force, F, until alpha = 0.35 rad. The tip of the force is fixed to the strip by some means, thus maintaining the lateral position...

Deformation of a metal sheet with a tip force applied]]>

Intermediate Math Challenge - June 2018]]>

Network Remote Connector & Pinger]]>

access to two copies of a web page, but _independently_ , i.e., to be able to move one copy

up while moving the other down. The standard options are using a splitter ( for desktops)

or an HDMI...

Viewing same Image/Picture Independently]]>

Playing trombone to 'wildlife':

]]>

attached: View attachment 227270

where ##J_{yz} ## is View attachment 227273

In a previous question have exponentiated the generator ##J_{yz}## to...

Infinitesimal form of the Lorentz Transformation]]>

3-D Printing Resources]]>

I would like to know if the following statement is true or false:

The nuclear processes that happen inside the Sun can produce at least one unity of each of the known chemical elements.

Best Regards,

DaTario]]>

Unknown Instrumentation: Antenna voltage monitor?]]>

Your photo must have, as its main subject, something that spins on its axis. For example, a windmill. You do not have to capture a photo while it is spinning. It is sufficient to show that the objects "normal behavior" is to spin on...

PF Photo Contest - Spin Angular Momentum (6/23-6/29)]]>

Eddy currents hazards]]>

Seawater sample temperature control – heat exchanger design]]>

My idea was:

Seeing the change of wave length of light as it passes through different substances.

My question is:

How do i measure the wave length? Because I could use a spectrometer but my...

School Project -- Measuring the wavelength of light in different dielectric materials]]>

http://uopnews.port.ac.uk/2018/06/22/einstein-proved-right-in-another-galaxy/]]>

What is the fan curve for such a combination?]]>

International Physics Studies Program (IPSP) University of Leipzig program review?]]>

Instinct

The reward is the survival of the lineage. but do animals know this as well? Do they have some kind of consciousness that they (well, actually not...

How does the reward system make animals want to reproduce?]]>

Curious situation: After it had influenced much the development of the string theory community’s attention and almost all of its public...

No metastable type IIB de Sitter vacua]]>

I understand that the integral here plays a...

Eigenkets belonging to a range of eigenvalues]]>

t-distribution, standard error - how to interpret]]>

I'm working through this paper, and have encountered "a little algebra shows that...", yet I'm not familiar enough with the topic at hand to figure this out. Here is the...

Help with Correlation/Green's Function of Rotated Variables]]>

Distance, Time, and Temperature question]]>

Only known variables include the solar flux on the Earths atmosphere at the equator is 1.5 kWm^ -2.

I've calculated the total energy from the Sun as 4 x 10^26 W, but can't seem to get to a calc of the mag of electric field at equator (measured in kVm^-2).]]>

Making glass filaments]]>

Apliying PCA to two correlated stochastic processes]]>

View attachment 227289

$$\mathcal{L}=T-U$$

$$\omega= \frac{d\phi}{dt}$$

$$I=mr^{2}$$

My problem is not finding the Lagrangian. But finding the kinetic...

Bead on a Helix, angular velocity]]>

I got part of the answer. You measure the angle...

How stellar aberration was quantified in the early days]]>

My HTML5 Physics Apps Collection Age 6-14 - FELP.PL]]>

The first interaction is by strong force (time of interaction ##t_1\sim 10^{-23}s##, which is also the time of generation of c and d),...

Measuring characteristic time of strong and weak interaction]]>

Lowest probability for physical possibility]]>

What is the fastest time can go?]]>

This was noted by the...

Skull Rack and Towers found in Mexico City]]>

In order for a vehicle (wheel) of radius r [m] and mass m [kg] to move at speed v [m/s], horizontal force F [N] should be applied at its axis. Find torque τ [N⋅m], equal to that force that must be applied on the hub.

Find the torque for a vehicle wheel]]>

Is there an answer to this question?]]>

LINE1 Transcripts Needed to Get Past 2 Cell Stage in Mammals]]>

Our Beautiful Universe - Photos and Videos]]>

https://www.physicsforums.com/threa...-actually-encourage-someone-to-pursue.742424/

Since the above thread is no longer open for new replies, I...

Fields worth pursuing -- 2018 update]]>

Does it matter if you have a very low voltage source with a very high current or a very high voltage with a very low current?

If the voltage and current multiplied meets the power rating, what should it matter what proportion...

What does a lightbulb prefer? Volts or Amps?]]>

A material which has a Young's modulus of elasticity of 250 GN m-2 and a poisons ratio of 0.32, calculate:

(a) the bulk modulus of the material

Relevant equation,

K=E/3(1-2v)

Inputting our known values,...

Calc the bulk modulus and Derive the mean standard deviation]]>

How to slow down a battery wall clock from the 1960's]]>

Expand ##(1+3x-4x^2)^{0.5}/(1-2x)^2## find its convergence value

on expansion

##(1+3/2x-3.125x^2+4.6875x^3+...)(1+4x+12x^2+32x^3+...)##...

Finding the convergence of a binomial expansion]]>

Can anyone advise if this is a satisfactory answer. Ive had a run over it and it does seem rather bulky for the given question.

Commercial and marketing:

Polymers can be classified in a...

Describe the methods of classifying polymeric materials]]>

When you decrease the wiper resistance on a potentiometer, the voltage drop between the potentiometer resistance and load resistance changes so that there's a greater voltage at the load.

Well,...

Potentiometers and rheostats]]>

Show order of (a,b)]]>

Looking for a cheap digital scale with accuracy <1 g]]>

Hi guys, I'm Liszzy newly join physic group. How are you everyone? I'm doing my canadian diploma in physic and need help from you guys. I've doubt in Kinematic chapter...

Hi Friend's]]>

charged particule reaches a uniform magnetic

What is the expression of the relation , expressed as a ratio, of...

Expression of radius and helical motion in magnetic field]]>

I am about to start my master thesis in computational physics and I need to make myself familiar with correlation functions, in particular with the radial distribution function of a system of N identical particles.

At Wiki, there is a short explanation of the...

Correlation functions - radial distribution function]]>

SR71 Blackbird intake spikes]]>

Here is the last page of part 5.

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

So, my question is: is...

Is it possible to be both an astronaut and astrophysicist?]]>

I just thought of this problem. In order to use Gauss' Law, we...

Finding electric flux using Gauss' Law]]>

Time Synchronization Across Switched Ethernet

View attachment 185308

...

Time Synchronization Across Switched Ethernet - Comments]]>

This is how...

Frequency domain filtering in Matlab]]>

How to cut down 12 volts to 1.5 volts]]>

What determines which state taxes apply? Is it the physical location of the buyer when the sale...

Taxes on internet sales]]>

This relation does not mean that ##R^{-1}## is a function. For example,

Let ##R## be...

Inverse Functions vs Inverse Relations]]>

Finding the max angle of a longboard deck before the wheels slip]]>

How to quickly prepare for a Data Science Career]]>

i am completely lost with this question. i need to work out:

a. what minimum length the column will buckle. b. what load the failure would occur. c. if column was half length what would be mode of failure and the load it would...

Buckling of a column homework help please.]]>

So I started thinking that maybe a topology is a way of defining the domain, codomain and image of a...

Topology usefulness]]>

The CDF from the characteristic function]]>

All of the references I cite are from Wikipedia.

Ex 1. Does the following isolated system have a calculable value for its entropy?

Assume a spherical...

Some confusion re entropy]]>

Problem opening certain threads in Safari]]>

a 15 kg crate, initially at rest, slides down a ramp 2.0 m long and inclined at an angle of 20 degrees with the horizontal. if there is a constant force of kinetic friction of 25 N between the crate and ramp, what kinetic energy would...

Not sure how to plug in numbers for Work Energy Theorem]]>

The first picture in the article is of a scientist with a Dr. Strangelove feel.]]>

(The layout was revised several times).

There are several right triangles referred to...

Did Stonehenge Builders Use Pythagoras's Theorem First?]]>

About the expectation value]]>

I studied Mechanical Engineering, Diploma Level.

I just got myself employed with a company which does a lot of steel works

I hope I will find lots of good reference for my work here.

Thank you, and have a nice day :)]]>

Battery connected to a pure inductor with a Zero-resistance wire]]>