Classical Physics

Is the Bermuda triangle a vortex in the earth's magnetic field? I had read many years ago that sailors who survived the effect there went mad. (medically insane). If so, how many such vortices exist in the earths magnetic field and do they serve any purpose if any?

Fascinating and counterintuitive. Just wanted to share.

Once again, I have made a design that I can't figure out why it wouldn't create free energy. Fuel cell Green is the fuel cell anode. This blue is the fuel cell electrolyte. Yellow is the cathode of the fuel cell. Electrolysis of water Red is the anode for electrolysis of the water. This blue is the cathode for electrolysis of water. This blue is water. It has sodium hydroxide. The < is a valve that will open when the first section is low on water. This should get free energy out of the fuel cell, if the turbines run the electrolysis. You would need to spin up the turbines to get it started. If there isn't enough energy to run the electrolysis, you would j…

Hello, Can you guys help me with these two tasks : 1. I have two containers one above the other. In the first one, the fluid temperature is greater then the second one (let's say T1>T2).Containers have a valve between them, when you open it, fluids will mix. In which configuration mixed fluid will reach its equlibrium faster - if T1 is in the upper container or if T2 is in the upper container ? Or it does not matter? 2. I have two rods that are the same material, same length but different diameter, one much larger then the other. Both are heated to lets say T1. Which one will first get to T2 (lower than T1) ? I know its basic, but I will appreciate any …

I'm trying to understand thermodynamics in a more concrete and precise way and I'm planning to start by defining all the macrostates. One thing we do in thermodynamics is instead of calculating for every atom its momentum, energy etc. we define some microstates that are observable and measurable, right? So what all macrostates do we define? I tried to come up with macrostates without referring anywhere and here is the list:- 1) Volume - How much space the matter is occupying 2) Moles - How much matter is there in the volume 3) Pressure - How fast the matter is moving These are the only states I could come up. It seems as if all other states are derived f…

Hi, Can someone tell me the steps on how to find the displacement in 3D? I am trying to solve the problem with given: seperate angles of two different vehicles from north, clockwise direction. magnitude of their distances from the origin. and the magnitude for elevation. there is an attached image. Thanks

I'm not an expert, nor claiming to be such, in any field, much less physics. My knowledge is very basic, not much higher than what you would learn at a typical high school. My question is actually inspired after watching an episode of Mythbusters (Episode #125 "Knock Your Socks Off") where they tested to see if a bullet fired would hit the ground at the same time as a bullet dropped from equal height. I don't find it surprising that their results were effectively correct. What I'm wondering though, is if the same thing would happen if they were able to test this in a vacuum. Granted they get about as close as possible to a vacuum by being indoors and reducing the pres…

The rain is falling down vertically and the person holding umbrella is moving with very quick pace. To avoid getting wet should the umbrella held in vertical or oblique direction.

The mass of the planets is calculated by taking the centripetal force (mass of planets times its velocity squared divided by the distance to the sun squared) to gravitational force (the mass of the planet times the mass of the sun divided by the distance between them squared) between the sun and planet. To solve the equation you multiply both sides of the equation by the distance between them squared divided by the mass of the planet. The result is the mass of the sun is equal to the velocity of the planet squared. This is high school algebra. You cannot find the mass of objects using the force of gravity. The rate an object falls or the velocity of an object in orbit hav…

What are the factors affecting the coefficient of l.ift?

is the following derivation correct (ignoring for simplicity's sake a few factors of c): for a single charged particle, instantaneously located at [math]\vec{r}[/math], in the Classical limit, the fields from said particle, at point [math]\vec{r}'[/math]: [math]\Phi(r') \propto \frac{q}{r}[/math] [math]r = \sqrt{ \left( \vec{r}' - \vec{r} \right) \circ \left( \vec{r}' - \vec{r} \right) }[/math] [math]\vec{A}(r') = \vec{v} \Phi(r')[/math] the potential generate the force fields: [math]\vec{E} = -\nabla \Phi - \frac{\partial \vec{A}}{\partial t} = -\nabla \Phi - \vec{a} \Phi - \vec{v} \frac{\partial \Phi}{\partial r} \frac{\partial r}{\partial t}[/ma…

I looked up an explanation of why a Crookes radiometer spins in light, and the accepted answer that I've seen---"thermal transpiration"---sounds like bull. Even if the effect is real, the force on the edges of the vanes would have to be small, and nowhere do I see even a suggestion that anyone has ever calculated the force. In fact it's claimed that "The correct solution to the problem was provided qualitatively": http://math.ucr.edu/home/baez/physics/General/LightMill/light-mill.html I came to a different conclusion (as have many; there are a lot of incorrect explanations). Assuming that the black surfaces are heated by the light, and are hotter than the amb…

From certain sources I have been led to believe that the reason for gravity in the universe, specifically for example, our solar system, is due to mass warping space-time and this interaction is what causes the planets to orbit the sun in such a predictable path. At the same time, I am also led to believe that this same effect of mass on the fabric of space-time is responsible for planets, specifically the earth, to retain an atmosphere and have the observable effects on objects - to be what we consider gravity here on the surface. Is this a result of the fabric of space-time forcing objects toward the surface (or center) of the mass of the earth - or, is surface gravity …

Hi. For a flat bottomed or for a mild V hull; where is more convenient to install a dozen of lead-acid batteries, to obtain the best stability ? As low as possible of course, but in two rows along the sides or a single row above the keel line ?

Ok so I got an idea formed over time that is pretty interesting. If light is a particle moving in a wave, then higher wave frequencies would result in a zigzag /\/\/\/\/\/\/\ like that which would create a longer path for light to travel across, but a lower frequency -------- should be more direct resulting in greater speed. This isn't much evidence of anything but there is more. Several scientific facts are being used here so I will list them ahead of time to make sure I have them all correct. 1. When light accelerates, the color changes. 2. When you accelerate, color doesn't change. 3. Acceleration affects gravity. 4.Gravity affects time. 5.Light always appears to …

Where does the energy for gravity come from? I know there is gravitational potential energy, but where is it from?

Dear all, We can create very beautiful scenes by a simple experiment that we can do at home Using a kaleidoscope. Put a LED source behind it to emit red color light to its back The red light will be scattered by the kaleidoscope to make marvellous images I attached here an example. As you see, the scene turns red, and it become blinking We can improve this by using LED with green color, or combine red and green ones

Two surfaces are placed. Surface block with the surface of the ground. The Coefficient of Friction (COF) is 0.1 between them. Friction is because of force acting downwards. The force is = x. By increase "x" to 100 times, will friction increase? I assume yes, but isn't there a limit?

Hi all I'm a newbie here and it's long time since I finished my physics classes so I need some help. I have a wood fireplace in my home and an under-floor heating operated on a gas burner. I wants to place a copper pipe in the fireplace and connect it in serial and before to the gas burner so it will heat the water of the under-floor pipes. Of course I will add some pressure/temp relief valve, and make sure that the water will not exceed the 80'C limit. I need to calculate what should be the length of the copper pipe placed inside the fireplace. The parameters: The fireplace temperature is about 1000'C (to be on the safe side) The copper pipe inner radius is …

Greetings, I noticed that it takes less force to slide a magnet off a magnetic object(magnet/ferromagnetic material) than directly pulling it off? The force needed to pull the magnet off could be 10LB while the force applied sliding the magnet off is 1 or less LB, only force countering the applied force is friction not magnetic... Why is that? I even noticed that only at the edge, there is a stronger force, but not as strong as the direct pull force.

I'm not much of a physicist and was wondering if someone could explain to me how terminal speed is reached and whether or not the weight of the object effects it...thanks x

Assuming we have 2 identical cars running in a straight line (same direction): car A running at top speed (rev limit) and car B closely following car A at a lower speed, but accelerating. Is there any possibility for car B to overtake? I presume that it's not possible no matter how great its acceleration is because it would mean to exceed the top speed.

To what limit can I reach with the decrease of the Coefficient of Friction? Say we have a surface that is 0.1, is it possible to make it 0.01 or 0.001? I believe it might be probable. By perfectly(well, semi- perfectly) cutting the surface of the materials, and also adding ultra-lubricants to the mix to get such a result.

Say we have a burning match(Energy in the form of heat + light) and a barrel of Fuel. I threw that match into the barrel got a HUGE explosion out of it! The total inputted energy is the burning match + chemical potential energy in the fuel right? The output would be a larger explosion( that is more heat and light)? Im I getting this right?

Hi, I want to make a nozzle for my rocket and I have problems with defining the diameter of the critical cross section of the nozzle. Normaly it is calculated from the area ratio, I know that the value of the area ratio for fast burning rockets is between 100 - 200. But ... it seems to me to much because with this value of area ratio, the critical cross section should have only 3 mm. I don´t know what to do. Thanks