Classical Physics

Is the acceptance of the conservation of charge based on experiment? If so, which?

What is Walther Ritz' force formula, and what is the essential difference between it and Newton's, or Maxwell's?

I'm wondering if anyone can help me with the distinction between first-order and second-order experiments. Does it come down to the question of the relevance or not of quadratic equations? Craig

I remember hearing something like this from a person I'm no longer in contact with, and it was something like, you can figure out the weight of substances by adding the weight of all the individual atoms in a substance, and you could also find how much atoms there are in a pure substance based on the weight, or something similar to that. Does anyone know anything about this? So say I have a block of pure iron that weighs 10 pounds. If I know the mass of an individual atom of that iron block which is like some negative 10th power kilogram or something, could I figure out the weight by multiplying the mass of that atom, by the gravitational constant on Earth, and then multi…

Is there a link here? So on the one hand, the energy stored in the electromagnetic field created by a (constant DC) current passing through a coil (from its inductance L), and the kinetic energy of the electrons themselves passing around the link. And a follow-on question (assuming no such link) is whether there is any effective contribution to the inductance of a wire from the kinetic energy of the electrons in the (constant DC) current flowing through it. What are the equations?

Hello, For some time now, I have been doing my best to conserve water. It dawned on me the other day that saving water also saves "energy." By this I mean, every gallon of water used from our city's system requires a replacement gallon of water to be pumped back up to the water tower. Assuming a gallon of fresh water weighs 8.34 US pounds and the water tower is, say, 200 ft high, how much energy is required to get that gallon of water back in the tower? I'm looking for an eventual energy equivalent of a gallon of gasoline (or diesel)... Your assistance is sincerely appreciated. Tired Old White Man

Dear Forum, I have found a company in Switzerland who claims to have developed a version of the "Sterling Engine" that uses compressed helium to produce electricity. Supposedly, they are close to a finished product that will "revolutionize energy production". I am not smart enough to analyze the technology, but am interested in it. Do you think this is feasible? Here are some links: http://www.kendersolar.com/index.php/The-solar-technology-of-the-Kender-Engine-Phase-1.html http://peswiki.com/index.php/Directory:_Kender_Solar_Inc I appreciate any input! Thanks, Mike B)

can anyone explain the basic use of a transformer in a rectifier

by the equations: fS = μsR fK = μKR why μK < μs ?

We are all familiar with wavelength and frequency but are we really? What is a photon doing that gives it these qualities. I remember when I was at school seeing light represented as a squiggly line on a blackboard. I never gave it much thought, just accepted it, but does light actually bob up and down in a wave as it travels along? This just recently struck me as absurd, surely light would pulsate equally in all directions and the squiggly line is a 2D reprensentation of its 3D nature. Then I wondered how polarising lenses work and I'm back at squiggly lines again (stop me if I'm getting too technical). So what is frequency and wavelength?

Hello All, I was wondering if you would like to take a shot at these questions that I am yet to find correct answers for. In the Figure attached you will see that there is Methane Gas just under Ocean Bed 30,000 feet below the ground level. Pipe A is a hollow pipe drilled to the Ocean Bed with just natural air in it to let Methane Gas exit. Pipe B is filled with water with a small methane gas outlet drilled in to the pipe separately. My Questions: 1) Will gas come out by itself from Pipe A due extreme pressure at ocean floor because of surrounding water above and decreasing pressure as we go up to ground level through pipe? If it will come up by itself what a…

I know that this subject is elementary for you actual physicists out there (I'm probably duplicating a pre-existing thread too), but I'm having trouble grasping the true difference between conservative and non-conservative force. Gravity and friction are often cited as examples, but it still seems difficult to conceptualize what is really meant by the terms conservative/non-conservative, and what their significance is. Someone please enlighten me? P.S. The context of my question lies in the current subject I'm studying in Physics II: Electromagnetic Induction, in that the distinction between an electric field and an electrostatic field is that one provides a noncons…

Hello, I don’t have a clear picture of this, can you help me grasp it? There are two pipes, filled with water, twenty feet high, vertical, and opened at the top. Pipe (1) is twenty feet diameter, and pipe (2) is two feet diameter. The pressures at the bottom of both pipes are the same. Please explain how 196 tons of water and less than 1 ton of water have the same pressure at the bottom? Exclude piping One cubic foot of water weighs 62.42796 lbs. Pipe one: = 6283 cu.ft. of water,and weighs 392184 lbs. Pipe two: = 20 cu.ft. of water, and weighs 1248 lbs. 250

Air is a poor conductor of electricity but how does an electric current pass through air during lightning? Thanks, Ron

E=mc^2 where E=energy M=mass c= the speed of light What value of c is used in a rotating frame? http://www.fourmilab.ch/etexts/einstein/E_mc2/www/

Roughly speaking, an Electro-dynamic potential, [math]\vec{A}[/math], can generate both [math]\vec{E}[/math] & [math]\vec{B}[/math], from [math]\vec{E} \approx \frac{\partial \vec{A}}{\partial t}[/math] & [math]\vec{B} = \nabla \times \vec{A}[/math]. Thus, an EDP, oscillating up & down along a single axis, would generate both the electric & magnetic fields, of a light wave. Is, then, the direction of [math]\vec{A}[/math] the polarization axis of light ?

Hiya, Could someone explain the difference between power and torque? Is it also correct to say that how much torque a car has determines its acceleration and how much power it has determines its top speed? flawless101

hi. i've got a very real life question and im wondering if this is the right place to ask it, but here it goes. i've rented an apartment which is next to the main street so i have trouble sleeping after 5-6am due to the traffic noise. since i cant make any serious modifications to the apartment cause i do not own it, i was wondering would it be possible to produce sounds which would help me sleep, which would actually "soften" traffic noises, or create some kind of counter waves which would reduce the street sounds? my idea was to automatize my laptop to turn on in the morning and start playing those sounds and continue doing so till i wake up and turn it …

I know the lesson that if you were to drop a book and a sheet of paper, the book hits the ground first, not because of its weight or its mass, but because of air resistance. So I was reading this website that attempts to explain it: http://www.physicscl...wtlaws/efar.cfm and was a little confused by this paragraph, with the relevant phrase bolded: Now, I understand the very basics behind how two objects will fall at the same rate in a vacuum, regardless of weight or mass. But when we are not speaking in terms of a vacuum, I thought it was still wrong to say that the reason the book falls faster is because of its weight or mass. However, the above quote seems …

I note from reading my physics book that "experiments show that the direction of the force is always perpendicular to the direction of the current and also perpendicular to the direction of the magnetic field". What the book doesn't go on to say is the reason for the preferred perpendicular direction. Does anyone know why the preferred direction is perpendicular? Thanks

In Lab last week we ran a simple experiment involving two gliders on an air track to show that momentum is conserved in both an elastic and inelastic collision. We used our hands to begin the motion of the gliders, allowing us to have direct control over the initial velocities of each glider. I understand all of the general concepts concerning this topic, although I'm having an issue with an extra bit of instruction given by the teacher before the lab begin. Right before the lab began, the teacher instructed that we should not give the gliders too hard of an initial push, specifically because more noise will be created during the collision and more momentum will be tra…

if a ball of mass 1 kg with horizontal force of 10N climbs up a slope of 60o what will be its total force?i mean the hori. component is known,mass is known,even the angle is known,how to find verticle component and force by which it is climbing up

I am on an epic mission to find out why things are different colors (or at least appear to be). I have looked up how the eye works and I know it has to do with wave-lengths but I'm still super puzzled!

How does a digital input work? I suspect that it's a flip-flop with a clock input, so that the value of the digital input is sampled at the rising (or falling) edge of the clock. I see a problem with this though. If I wanted the digital input to be a counter, then, if the input is another clock running faster than the system (sampling) clock, I would not be able to count accurately. So how are digital inputs usually implemented?

Please have a look at the attached image. What could be the reasons for the bulb not glowing? One reason is the use of a weak electrolyte.....what could be the other reasons? Thanks, Ron