Classical Physics

In 1966, a BOAC aircraft flying over Mt. Fuji was beset by turbulence, broke apart, and crashed (DC What You Can't See -- In the Air (DVD)). Could some sort of SONAR system, facing forward from the cockpits of passenger planes, perceive pockets of turbulence ? Could such systems "Whale / Dolphin blast" forward-fired intense SONAR pulses, to break apart those pockets, before finally flying through them ??

When calculating Wave Power: [latex] P = \frac{\rho g^2}{64\pi} H_{m0}^2 T \approx \left(0.5 \frac{\text{kW}}{\text{m}^3 \cdot \text{s}} \right) H_{m0}^2\; T, [/latex] Where on the λ is the calculation taking place? is the calculation the result of a point on λ relative to the resting point? Does the calculation take into consideration the energy at various points along λ? Or is it just calculating the power of the resting point to the max magnitude of the wave? http://en.wikipedia.org/wiki/Wave_power

relationship between simple harmonics to KE and PE is little frustrating!

When electric current flows through the nichrome wire , heat is generated. We know this phenomena macroscopically. Then, at the microscopic level or atomic level, how the heat is created?

helical spring formulating to simple harmonics is devastating. kind of hard!

Simple. Let's think it over. Why high frequency wave is high energy state than lower one? Everyone know this phenomena well. But how to we describe it exactly? Don't use E=hv =h / lamda equation.

It's well known electrons pass through the wire. But how does one electron move form this part of the wire to that end of it is not well known. One of them is this . We think it as a water pipe, one water molecule goes into this part of the pipe and another molecule comes out at the other part of pipe. And the velocity is very fast. It is close to light speed. Is this concept right?

ok i am a huge bow hunter and i am have a serious debate on kinetic energy with compound bows. i have a few people that may be right that i am argueing with. here is my question. i am shooting a compound bow at 72 lbs of draw force, the arrow weight is 415 grains and the velocity is 337fps. i am calculating my kinetic energy at 100.4 ke. now here is my question and the debate. i have a few people telling me that now matter what, if i go to a heavier arrow weight, that means that my ke will go up no matter what. i beg to differ unless i am re tarded. if i take a 650 grain arrow and shoot it threw the same bow, same draw force of 72lbs and the arrow is flying at 259.5 fps ,…

Here is a problem in optics: I have often noticed that even when perfectly detailed, miniaturized models of ships, planes, or cars are filmed, they still look fake on camera. What is the physical explanation for this? Could it be something to do with the ratios of the light waves to the object size being unnatural?

Everyone knows well high temperature copper is bigger than colder one. We know this macroscopical phenomena very well. And there is a parameter related to this phenomena such as thermal expansion factor. But we don't know well about it at the molecular level. Why copper is expanded when temperature is increased ?

This has always perplexed me with regard to tides. I understand that the gravitational attraction of the Moon causes the oceans to bulge out in the direction of the Moon and another bulge occurs on the opposite side because the Earth is also being pulled toward the Moon (and away from the water on the far side of the Earth). My question is why isn't the water (on the far side of the Earth) also pulled toward the Moon because if the Moon can pull the far side of the Earth towards it why can't it also pull the water that's also on the far side towards it as well? Thanks

I've been told an electromagnetic submarine was made in the 1970's by a Professor and his students from a California university. There were no moving parts and the sub moved slowly. I've done some searching and I haven't been able to find anything. Any information would be appreciated.

Right, I was taught in school that Newtonian gravity works on the M1M2/DD formula and I accept that as true. However it was pointed out to me recently that this requires instantaneous action at a distance. Assuming that is impossible then when considering the Earth/Sun system the Earth is not attracted to where the Sun is, but where it was 8 minutes ago and vice versa. Similarly when considering entire Galaxies the Milky Way is not attracted to Andromeda, but to the point where Andromeda was some 2 million years ago. Question 1. Doesn't that muck up calculations? Or doesn't it make a difference? Following on from this. If two bodies are without relative motion…

hi guys. i have a theory that may help us bring find a source to this energy crisis. well first off i got the idea off calculators with solar panels and thought why not. i want to ask you guys if this is even possible. take a look at the attachment and i will try my hardest to answer any questions u guys might have (its probably wrong and stupid but i think it was worth a shot)

Why is the voltage accross the branches of parallel circuit, the same for all branches? Why dose a dead battery show its rated voltage accross its terminals? Thanks fellows, if you could kindly help me understand these things.

I've been always wondering what is the real explanation of gravity. How & Why are we attracted to Earth regarding different materials, I mean Earth's gravity attracts everything(living organisms, mountains, oceans, even air) so what is it exactly the physical reason for this kind of attraction. I couldn't even compare it with Magnets, as magnets attracts only metals, when Earths gravity attracts everything. I would be grateful to any answer, thanks.

Hi there, I don't understand why the equal of Newton's law of gravitation F = Gm1m2/d(squared) is different for no spherical objects. In the image of my attachment there are one spherical object and a no spherical object. So why if there are not very distant the equal used is F = Gm1m2/d(d+L). How It's used (d).(d+L) on the contrary (d).(d), which is the original equal? Thanks Tony PS: Sorry about my english.

What is the most basic way of determining a medium's refractive index, and what does that method presuppose (e.g. a wave theory)?

Welcome to post number 2. A thought experiment. Imagine you are a mermaid living in the middle of the ocean. You have never been to the top or the bottom. You live a happy life amongst the fishes. Who you eat occasionally. You breathe in air through your tail and you blow it out of your mouth. And life is going swimmingly. Then one day you see a couple of rainbow trout who are watching the migration of the seaweed together and suddenly you are overcome with a sense of melancholy. You go to your favourite warm spot in a cosy part of the middle of the ocean and swim there doggypaddling for a while, blowing out bubbles in front of you and watching the way they bubbl…

Couldn't I just make something out of pure electrons or protons? I'm sure there's some force in the universe that can do that, There's stuff thats made out of only neutrons and its still being held together. Otherwise more classically, I understand that when you cut a magnet, the left over pieces will have north and south poles, but why always every time? And what would it take to make a monopole?

What is the essence of Lorentz' electron theory? I know it presupposes a wave view (à la Maxwell), but, for example, does it conceive of electrons as particulate?

Hello and welcome to my first post. I am the Devils Advocate. I do thought experiments that are just plain evil. I start with something wrong and twisted and then try and persuade you everything you know is wrong and twisted.But with no further delay... my first topic: Myth 1? Two objects fall identically due to gravity regardless of mass. Really? Interesting.You can do this one at home. 1. Take an object, an egg will do, and drop it from your outstretched hand. Observe its fall. Now clear it up. 2. Now take an imaginary egg up to the moon on a quick field trip. Do the same experiment. Drop it from the same height. Let's call it a metre in both cases. It…

Is there a relationship between the density of an object and how much momentum or energy it transfers to another object per square inch/2.54centimeters?

What is the difference between a magnetic and an electromagnetic field?

What is the difference between the (Biot-Savart) electromotive force and Maxwell's dialectric current?