Classical Physics

When you're driving a car, and a big gust of wind slams into the side of your car (perpendicularly), what is the best method to counteract the wind from moving or misdirecting your car? Should you increase speed? Would this increase drag on the front of the car and increase friction at the wheels, hopefully overpowering the perpendicular force of the wind? Or would slowing down help?... (obviously role down windows to reduce drag from the side direction, but lets assume that has already been done). -*NOTE* - by strong winds, I'm not referring to tornado magnitude winds, just really strong stormy winds, in which you're inconveniently placed at a ve…

Hi! I've been wondering about this since i'm a bit confused when it comes to fuel cells. As you can see protons (H+) can go through Electrolyte, but i'm very confused why electrons don't. According to Google, this is how fuel cells work: But in general terms, hydrogen atoms enter a fuel cell at the anode where a chemical reaction strips them of their electrons. The hydrogen atoms are now "ionized," and carry a positive electrical charge. The negatively charged electrons provide the current through wires to do work. This states that the hydrogen atoms becomes ionized (including electrons?) but aren't electrolytes "a liquid or gel which contains ions"? Though i'…

Hi forums! Just wanted to start out with a greeting as i'm new to this forum. I'm 14 and i'm in the 9th grade (Swedish school) and we're starting to learn about half-life and radioactivity. I'd really want to know more about it and if anyone knows a way to briefly explain how these two are related to each other and how they work. We haven't gone into it that much and this is why i'm here. Physics and math are my absolute favorite subjects and i want to explore whatever i find within these two subjects deeper and more complicated. This might be much about me but this is to give you an idea of what kind of person i am and how you would be able to explain it to me. All t…

A tensor of stress may be represented as a ratio of vectors. Please see; link removed

Hello, Can you help me? Consider your eye as a thin convex lens of 5.1 mm and with focal length of 13 mm. How far must be a object from your cornea to create a image on your retina? I found 41.62 mm by using equation of thin lens 1/s0 + 1/si= 1/f, is it good?

The interference properties of light require the light to be coherent. Since the origin of the light is state changes of individual atoms the wave fronts (or individual photons) would seem to have random spacing.

Hello I am making a vibration project which requires me to mount eccentric weights on both sides of an electric motor. I must submit the "generated force(in Kg)" by this motor. The RPM of motor = 1000 Total weight on both sides of the motor = 16.8Kg (8.4Kg on both sides) The radius(distance from the center of the shaft to the end of the weight) = 103 mm What will be creation of Centrifugal force when this motor is run at 1000 RPM ?? Dhiraj

I have been reading about how dipoles produce an inverse cube law. The sad thing is that I can't find any maths behind it. Am I reading a crackpot theory? If not could someone post the maths or give a link to the maths?

Why is it that the decay product of a normal Neutron is called anti matter, ie the electron anti neutrion, which the decay product of antimatter, the antineutron is normal matter, ie the neutrino. What makes a neutrino a normal particle and an electron anti neutrino an anti particle? Sorry, wikipedia is my only source. http://en.wikipedia.org/wiki/Antineutron Should the entry also include a decay where a antineutrino is produced for conservation of energy?

Why cant acceleration and velocity cannot change abrubtly at an instant..??

What does sharp kinks signify in a position time graph...?

Does air resistance affects the motion of a free falling object...of yes plz explain..?

Plz guys help me....in a book it is stated that according to galileo's experiment of free falling objects, change in velocity with distance is not constant, it decreases with the increasing distance of fall.... What does it mean..??

We know that avg speed and avg velocities can or cannot be equal....but how is the magnitude of instantaneous velocity always equal to that of inst speed...

Hello all, I am a non science person, just joined. Can some kind person help me find out what the circular dial on the right side of my Imperial digital Parkinson Cowan gas meter represents. Kwhs? units? While researching the internet for an answer, I have come across abbreviations: 1 eu.tt and cu.tt (oxfordshire.gov.uk/cms/sites...website). What are these please? I would be most grateful for help and if you don't mind, could you please tell me where to find my post when I log in to get any answers. Regards Alan

and also does a charge radiate when it decelerates as well?

Hello, Can somebody help me? Light enters an optical fiber(ideal glass optical fiber without cladding or buffer)at the normally cleaved end. How calculate the greatest angle of incidence I that will result in total internal reflection of the light? I know Snell's Law and refraction Law and I have found 21 or 42 degrees but that don't seem correct... Thanks.

Could tesla coil's high frequency ionize gases? Such as hydrogen, argon, xenon or so. Because it is alternative pulsed high frequency, like radio frequency (magnetron)

First sorry for my English. If I know the tension T in a elastic string, the initial length L , the length after stretching (L+l),the mass density, how could I find the speed wave in the string by using Hooke's Law and considering the string as a spring, Thanks.

First of all, I would like to say that this model is NOT a perpetual motion. It will stop eventually. What I want to say here is that the output useful work seems to be greater than input energy My system consists of 2 elements. Each element is a cylinder put on an axle. There are two permanent magnets stuck on each cylinder, with their north poles are faced outside. In the youtube clip that I will show you below, you can see the magnets of the first element are painted in blue, while those of the second one are crossed with X. I turn the cylinders slightly so that the north poles of the magnets are faced each other. Then, the thrust between magnets make the cylin…

hello everyone!!! i would like to know why a baseball player should swing his bat (follow-through) after hitting the ball? Is there any reason according to physics concept? What is the purposes? ~thanks

I was looking at the diffraction reflection of an illuminated early 1980s green LED using a CD in a dark room and the spectrum was red-yellow-green; why? I thought that LEDs were pure monochrome light sources. Also, a modern blue LED had green in its spectrum. Again, does anyone know why?

Like a dancer that is spinning very fast, if there are other variables or a certain particle within the body, would it be possible? And if so, then what would that particle inside the body be?

Hello. Tidal currents are a brutally high potential suppliers of all the energy the planet may need, and much more. The ´generator´ is the orbiting moon. Assumming (or dreaming) that all the tidal currents in all the planet seas and waters were tapped to supply the world energy needs and more; would that affect the rotation or orbits of earth-moon ? -Yes, a lunatic question-

Evening all, I have an allotment (in the UK an area used to grow food) and I am thinking of setting up an aquaponics system (which is where you grow vegetables in a media bed and raise fish for food in a closed loop system http://en.wikipedia.org/wiki/Aquaponics) but the trouble is I have no access to electricity (to pump the water from the fish tank into the vegetable growing media bed). I stumbled across siphoning and was wondering if it would be possible to utilise this phenomenon to get around the need for a fish pump? http://en.wikipedia.org/wiki/Siphon 'While a simple siphon cannot output liquid at a level higher than the source reservoir, a more complicated d…