- 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...

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

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

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

Role of accelerating voltage in Davisson Germer experiment]]>

Hello.

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

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

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

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

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

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]]>

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]]>

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]]>

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

the...

Magnetic field wire]]>

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?]]>

rotating rocket problem]]>

}

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?]]>

Why does he think that this movement has anything to do with electricity?]]>

How to find speed of light practically?]]>

I've been reading "Statistical Mechanics Algorithms and Computations". And I came to a problem while processing Algorithm 1.26 (I attach a link at the end). I don't get why the weights are the way they are, specially I can't understand the sequence {1/2l,1/l,...,1/l,1/2l}.

Does anyone...

Problem with a convolution algorithm]]>

I had a question, related to a recent experiment we've done, that I have been thinking about for a while now. Hopefully someone can help as it has been bugging me!

Consider two situations:

A: a syringe is filled with 5ml of air and then sealed

B: the same syringe but now filled with...

Pressure in a sealed syringe]]>

anyway.. first off his wool and ebonite rod stopped putting a static charge on his christmas tree tinsle that he has on the end of a piece of a metal hanger sticking out of a metal...

Photoelectric effect suddenly stopped working help]]>

is there a delay from when the rope is cut to when I start to fall?]]>

How does density affect thermal conductivity?]]>

Material for black hole travel]]>

2. A perfectly flat and perfectly rigid wall

Say i throw the ball at my FLAT wall also giving the ball a linear velocity

The only contact with the wall and the ball is a point... a POINT !!

So, I can as well forget about the rest of...

Does Normal force always HAVE to be perpendicular to plane ?]]>

I've been thinking about the classic example of a ball attached to a string and moving at constant speed in a circle. The acceleration is v^2/r and always facing in the...

Calc-based conceptual problem with centripetal motion]]>

Solenoid self force]]>

Derivation of Rossby number]]>

When a ballon sticks to a wall after becoming negatively charged, why does the surface of the wall become positively charged? I would assume that the repulsion between negative charges forces the...

Static electricity questions]]>

Is the magnetic field conservative or nonconservative?]]>

Thanks in advance to any answers ☺]]>

Is it possible to collimate monochromatic light with a taper?]]>

Does a moving body possess impulse?]]>

What does he think he is sending though the wire, there is not yet a concept of atoms or electrons as we know them...

Electricity through a wire.]]>

https://en.m.wikipedia.org/wiki/Forms_of_energy]]>

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

Significant Figures]]>

Firstly how does osmosis work exactly? I read that because there are less free molecules of the solvent on one side that the solvent on the other side flows in but there were lots of...

How osmotic membranes function]]>

Monochromatic RGB light sources passing through a prism]]>

Then the meter was defined in terms of the speed of light and this had the effect of giving the speed of...

The standard of meter]]>

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]]>

First of all, let me say that I am aware that a higher amplitude doesn't translate into a higher frequency.

However, my understanding of how for example a string vibrates makes me draw other conclusions.

From what I understand, hitting a string with a particular force makes the...

Amplitude vs Frequency]]>

Finding distance travelled with drag]]>

It is supposed to be 3L/4]]>

Black hole formation]]>

Measurement standard for joules = Momentum in kilograms]]>

The simple connections SHM]]>

and second, du^2/dx seems to be equal to udu/dx.

Why is it so? I attached my notes here for your reference....

Conservation law form of Navier Stokes Equation]]>

Far field

Near field

Something between far and near field

That got me...

Visualization of electric field around dipole antenna]]>

Do all light waves move at the same speed?]]>

Think of this thought experiment. A permanent magnet is suspended 1m away from the floor. A steel ball is placed onto the floor under the...

Where do magnets get their energy?]]>

Surface roughness and Magnus force of a cylinder]]>

I have a question regarding compressed gas. I'm doing some experiment for testing some seal (see hatch area on sketch below) at 10,000PSI by using nitrogen gas. in this experiment, i accidentally got some different result based on two different situation. you can see my experiment...

Force generate by compressed nitrogen at different volume]]>

Magnus effect, what is the correct formula?]]>

Coupled pendulums with different masses]]>

My question is why momentum is not conserved when a car comes to a normal stop?]]>

you guys helped me out before so i was able to not sound like an idiot to my son and helped us share time and interests together

this year in 6th grade he did a great science fair project on the duality of light and did the double slit experiment and...

Lenz's law questions from a dad of a smart son]]>

Also, I know strain is...

What is a good physical reference for microstrain?]]>

Imagine there is a four gram bullet, but someone want to accelerate it with force or power equal to 100,000 horsepower. How far the distance will the lightweight bullet cover in a second?]]>

Shower at times gets cold]]>

i don't understand how did GRIFFITHS prove the statement from(C) to (B)

What is his logic in this case?

and

What is Ai Aii Bi Bii in the integral?

thank you]]>