In many, many problems I've worked with "find the work to lift X", you simply take the change in potential energy. When lifting Mass...

Lifting Power]]>

So that's...

I would like to get a feedback to this video]]>

I understand the mechanics of jumping straight up and landing on the same spot when inside of a moving bus travelling at a constant velocity but what happens when I jump straight up when skateboarding downhill? Do I land on the same spot on the skateboard, do I land further back relative to...

Jumping straight up while skateboarding downhill]]>

Gas Law applying to air vs water vapor]]>

We all know that weight plays an important role in determining the speed of a vehicle, such as dragster like Top Fuel. But how about a rocket-powered dragster that uses hydrogen peroxide? Rocket-powered vehicles indeed accelerate faster than any wheel driven vehicle, but do weight...

Rocket vs wheel driven]]>

But whenever I increase the resistance, the amperage increases rather than decreases! For example, when I use a 500 ohm...

Solar Cell Current increases as Resistance increases Problem]]>

but now you put him inside a tube where he can move along varying the radius of the circle

now the normal acceleration will be zero because he is in the...

A doubt on tangential and normal aceleration, pilot g forces]]>

So, if we have two Z bosons (or any other bosons with mass but no repulsion due to charge) which are...

Gravitational potential between two massive particles...]]>

Cause of multiple paths of electrical breakdown?]]>

Rotating rocket problem]]>

Beam-powered propulsion - keeping the beam focused]]>

Can stationary permanent magnet do work?]]>

Evaluating partition function (stuck for weeks)]]>

Single stage rocket]]>

question on convention - R vs r using universal law of grav.]]>

Now, there...

Calculating power spectral density from FFT]]>

Viscosity, two immicible phase flow, wettabilility]]>

In short: For an air leg or air spring, there is a method using a Taylor approximation to find the spring constant for very small displacements, but I can't seem to figure out how it works. I've learned that air legs don't follow Hooke's law very much at all, except for when the...

Approximating a spring constant for an air leg]]>

What will happen in this case -- 2 chambers connected by a tube...]]>

Thank you in advance.]]>

- I hear the intensity of the rain hitting the roof of the car

- there is a lightening flash

- for a couple of seconds the rain intensity eases up noticeably, then resumes

- then the thunder clap follows a little bit later

It...

Lightning discharge's effect on rain fall velocity?]]>

The manufacture of ionization smoke detectors]]>

I'm an undergraduate at a large research university in Massachusetts working in a lab where my group contributes to the Muon g-2 experiment at Fermilab in chicago. Essentially what I'm working on is optimizing an optical rotation (Faraday) magnetometer system for use in magnetic...

Electronic Noise General Questions - Laboratory Setting]]>

I am not sure if this is the right forum for this but I believe it is the closest to the question I would like an answer to.

I would like to calculate the electrical force between Mars and the Earth. I believe I understand that in order to do this, I must apply Coulomb's law:

E=...

How to calculate the electrical field of planets?]]>

the beam is vertical and i assume it will go to horizontality

this force that moved the wood beam implies a work has been done and hence potential energy has been spent

but if the beam has density 0.5 it means it has the...

buoyancy problem]]>

Thank you.]]>

(1) What is the flow of electrons like in this case?

I thought electrons are supposed to flow from...

Photoelectric effect]]>

Calculation of heat loss by Degree C/minute.]]>

By far, the easiest explanation of E=mc2, Einstein’s famous mass-energy equation, means that mass is a form of energy and that, mass can be turned into energy (heat, light, other particles, etc) and vice versa. It also seems easiest to say that photons are “pure energy” and are...

E = mc^2, Wikipedia Mass–energy equivalence Clarification]]>

How does a Triple Beam Balance work?]]>

Impact of thermostat on efficiency]]>

but two counter rotating gyros set in a V shape will offer resistance in all axes of space

so an astronaut in space has the arm aiming up and in each hand he has two counterotating...

I fail to see how two counterrotating gyroscopes behave]]>

About gravitational attraction]]>

Electromagnetic Radiation temperature]]>

I don't understand the concept behind equation (1). I think that the equation V=-Nd(flux)/dt is only for magnetic induction. However the power of the primary coil is usually supply by an a.c. power source. (So as to provide a changing B field.) Therefore, it is not...

Confusion about transformer]]>

We consider two walls in x=0 and y=0, in (a,bi) , a>0, bi>0 ,we have a source in this corner and I need to find the potential biy using the method of image. After this I need to find v, the pression and the...

Potentiel of a source in a corner (Fluid Mechanics)]]>

Change of kinetic energy = 1/2 * m * (v

When the initial velocity is 0 m/s I have no...

Kinetic energy change with initial velocity]]>

Contributed by Marlon and ZapperZ.

In our ordinary world, “wave” and “particle” behavior are two different and opposite characteristics. It is difficult for us to think that they can be one of the same. Is light a particle or a wave? The simple, naïve answer to...

Is Light a Wave or a Particle?]]>

in napolen funeral notredame dome was set a right lens oculus to project the clouds around napoleons corpse...

Could church domes be used to project clouds on the floor?]]>

during seismic movement.. when the ground shakes or accelerates.. does it mean bigger foundation would be more resistant and move less.. and smaller foundation can move more?]]>

I was mostly reading Wiki articles, and I found something I couldn't understand, so I'm asking for help.

According to wiki, peak power output of the largest nuke ever was...

Energy output of a nuke]]>

Also, would the radiation travel through the torroid?]]>

Hello.

Imagine a closed box with reflecting walls. Inside you have two...

About interference, momentum and thrust...]]>

The two measured values are precise to two decimal points. But the first one has three significant figures, while the second one...

Significant Figures]]>

Calculate force needed to move an object during a turn]]>

I have info on sizing a heating element based on available power and I have and equation to quantify heat transfer through the walls and insulation but I'm...

I need a bit of direction...thermodynamics & kilns]]>

Where ##X_0## is in g ##cm^{-2}##. How can it be in those units when everything in that expression is dimensionless? It's...

Dimensions of interaction/radiation length]]>

Role of accelerating voltage in Davisson Germer experiment]]>

where a single stage rocket will be superior to a multi-stage rocket, and if so, why?

i'm under the impression that multi stage is always better, but i don't think that is entirely correct.

Good day to you all]]>

Real Research in Unexpected Places - Backyards, Barns, Bayous...

Real Research in Unexpected Places - Backyards, Barns, Bayous - Comments]]>

the field inside a current carrying wire is B = μoIr^2/2πR^2

the...

Magnetic field wire]]>

Best Vacuum Ever Achieved]]>

Generally speaking how important is determinism in physics?]]>

So the experimental data seem to suggest that at resonance (V

(RLC in series) What is the R Voltage when at resonance?]]>

Discontinuities in the time derivative of the magnetic field]]>

Torque positive vs. negative]]>

in electrospinning, a positive charge of around 10.000Volt is applied to a needle, where a viscous polymer is extruded. There is a grounded collector in a distance of 15mm and the established electrical field generates electrostatic forces and draws a thin polymer jet to the...

Electrostatic force on polymer particle in an electric field]]>

Fundamental assumptions of statistical mechanics]]>

As close as possible, without touching]]>

I'm currently trying to calculate electric forces between two objects, so for that I of course need Coulomb's Law.

I understood its equation (etc.), but there are 3 things that I haven't found out yet:

-How exactly can you find out or calculate what amount of charge an object...

3 basic question about Coulomb's Law]]>

Here the particle is performing circular motion due to the rotation of the earth. And for the circular motion it requires centripetal force then which force provides the necessary centripetal force. I think it is mgcos(lamda). Am i right?]]>

He said they successfully recorded the speed of light using a trillion fps camera that they had created. But isn't light already there even before someone started to record it? Not to mention that light is not actually...

Recording lightspeed?]]>

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what are the units of Amplitude ?

I know Frequency is in Hz

also what are the unit of F?]]>

Law of conservation of momentum in a non isolated system.]]>

View attachment 109835

where g is of course the gravitational acceleration, and y is the flight path angle, but can...

Gravity loss of a rocket]]>

Thx.]]>

Let ##u_i(\mathbf{x},t)## be the velocity field in a periodic box of linear size ##2\pi##

$$u_i(\mathbf{x},t) = \sum_{\mathbf{k}\in\mathbb{Z}^3}\hat{u}_i(\mathbf{k},t)e^{\iota k_jx_j}$$ where

Spectral representation of an incompressible flow]]>

V]]>

https://en.wikipedia.org/wiki/Crankset

How will these bikes differ when riding?

Is one harder to pedal than the other? Why?]]>

I've written a code using ode45 which describes the motion of a body m around a central one M (e.g a satellite around earth). I've done it with initial values that set the trajectory of the particle to be elliptic.

Clearly, energy and angular momentum need be conserved in this...

MATLAB - Motion of a body around a central one]]>

I was asked this question recently and have got myself confused with an answer. To expand on the question a little, when riding through mud at the same speed, which would spray the mud further, a 26 inch wheel or a 29 inch wheel? My thought...

Spray from bike wheels]]>

We can measure the distance of galaxies using the speed of light, so we know that a galaxy 8 billion light years away for example...

Andromeda problem]]>

***EDIT***

More accurately

subindex 1; initial state of a control mass

subindex 2: end state of a control mass (end state is simply state 2 in the problem at hand)...

Confusion: Internal energy u vs enthalpy h]]>

Blower for linear air track]]>

The gas is heated externally and the gas expands. Will the expansion be isobaric or isothermal?

One argument would be: the expansion will be isobaric because the weight is providing constant pressure. The...

Isobaric vs. isothermal expansion]]>

The example is high pressure AIR (a real gas/ not ideal ;-) of relatively unlimited volume,

released via a rupture diaphragm into an enclosed tubulation. (dead ended)

Relative dimensions...

Gas compression and heating?]]>

We don't study maxwell equations yet so when I'm doing a research about E=mc^2 and especially ghe energy part I came across electromagnetism and of course these bizarre equations for me !!

I tried to understand them using internet but I...

Can I understand Maxwell's equations on a very basic level?]]>

What defines electric energy?]]>