Classical Physics

What is the Capacitance, of say 40 Miles of Cumlionimbus cloud?

If I was driving in a car how could I differentiate between jerk and acceleration? How does jerk feel compared to acceleration? Also, at what instances is jerk noticeable? (I'd imagine coming to a complete stop and maybe shifting gears?)

Ah, sorry for how vague this post is, but I wasn't sure where to place it. A couple years back I was watching a documentary on this location (Somewhere in N. America) that seemed to defy the laws of physics. Like, at a certain point, if you had a slope, and you put a ball at the bottom, it would roll up, that sort of thing. There was a physicist that bought the place in the mid 1900's and did thousands of experiments in it, then one day he burned all his research and died shortly after. I tried searching for a previous thread about this but couldn't find anything, did anybody else see it? A lot of the info in this post was probably altered from memory by the way. …

This is my question: 1 volt per second equals 1 tesla per square meter equals 1000000000 nanotesla and yielding frequency of 42580000hz or 42.58mhz denotable through the proton precision frequency calculation which is: Capacitance to frequency "W.value =42.58*(this.value*1E-9)*1E6" "F.value = (1E9*(this.value*1E-6)) / 42.58" . these calculations I need to know a few different variables for the how the 42.58mhz was 1 volt because they were using a medium of hydrogen, and all equations are thereby based off of efforts to describe a system through hydrogens atomic scattering factors, when there are billions of different frequencies, yielding billions of different ele…

Consider the bicycle wheel experiment described at the following site. Suppose that you get the wheel spinning at a rate of 10 revolutions per second. I think thats reasonable. Then you let go of the handle. The handle is going to trace out a circle, in the appropriate frame. denote the distance from the center of mass of the wheel assembly, to the point where it is attached to the chain by R. Suppose that you measure the time it takes the wheel axis to complete one rotation as 6 seconds, and to a reasonable approximation w is constant during the first 'orbit' Using your measurement of w, and of R, what is the mass of the bicycle wheel? Introd…

Here is an article at Wolfram about rotation. In the article you will see mention of a rotation matrix. I'd like to discuss this particular article, with a view in mind to answer the question, "is rotation absolute or relative." This is going to help me in my ongoing analysis of precession, and things like Foucalt's pendulum. I am hoping to learn something new, and resolve a hundred or so unanswered questions of mine. The article starts off with what is a very important statement, as regards the mathematical analysis of rotating frames of reference. The article begins: I do not see them as conventions. Something deeper, which involves the very mea…

Please take a minute to help me out with highschool phys prob. A car of mass 1200kg is travelling down a hill with an incline of 1 in 10. Speed = 30 m/s when a constant braking force was applied. The car stopped after travelling 90 m down the incline. What was the magnitude of the constant braking force applied? my answer for it is incorrect . i got 6000N, but i didnt take into account the fact that it is on an incline at all lol, i had a go but wasnt sure how to thanks for your help in advance im sure this will be childs play for most of you! edit: sorry people, i didnt realise there was the 'homework help' section here, i just registered to…

1) True or false: (a) If the electric field is zero in some region of space, the electric potential must also be zero in that region. (b) If the electric potential is zero in some region of space, the electric field must also be zero in that region. © If the electric potential is zero at a point, the electric field must also be zero at that point. (d) Electric field lines always point toward regions of lower potential. (e) The value of the electric potential can be chosen to be zero at any convenient point. (f) In electrostatics, the surface of a conductor is an equipotential surface. 2) If the voltage across a parallel-plate capacitor is doubled, w…

I'm planning an investigation on how magnetic flux density midway between opposite poles of 2 bar magnets varies with separation of the bar magnets (using a Hall Probe). [simply as shown in attachment] To do this, I'll need to calibrate a hall probe (which I think is done by working out the p.d. (Hall pd) at a known magnetic field strength). My initial thoughts were that I could use a long straight wire of known current, and use [math] B \ = \ \frac{\mu_0 I }{2 \pi \ r} [/math]however, this would not work would it? Due to non-uniform magnetic field. Is the best approach to use a "Helmholtz coil" to get a uniform field- and use the formula given here: http://en…

A car engine produces a maximum power of 95 kw at 6000rpm how can i calculate the torque at the maximum power?

I want to understand the following formula: t=I a Where t denotes torque, a denotes angular acceleration, and I denotes the moment of inertia tensor. I've been doing a great deal of reading, looking for someone who understands it more clearly than any other, and I've had no luck. I really really want to understand "moment of inertia tensor" Is there anyone who has a deep understanding of it, who can shed some light. Even historical information is welcome. Like who developed the formula, when why how. I have those kinds of questions. Also, I think this thread might ultimately be quite valuable to others, who don't understand that formula ei…

I have always wondered how a boomerang manages to reach a certain distance and then start back towards its thrower... I never really thought about the mechanics of it much, mostly because im not to great with physics, so does anyone here have an explanation on how boomerangs "work"? -Does it return, because you throw it fast and its spinning fast but as it slows down, it still keeps spinning, causing it to...uhh never mind.

I was watching a documentary on the hubble and the commentator mentioned something about the telescope using reaction wheels and gyroscopes to point itself and then keep pointing in any particular direction. I know that gyroscopes have a stabilising effect but can they really exert force to move the scope in the right or wrong or even any direction? I thought that if say a wheel is used to create a turning force on the scope then when it was brought to rest it would have the opposite effect and we would be back where we started. How does this kind of system work?

Hi all, I would like to know if I am crazy, or not. I hope to determine if it is possible to transfer kenetic energy by dropping magnetic core material (speed of gravity) through an energized coil. Any way to develop equations to measure voltage induced? I am thinking large. Imagine a series of coils of 100 foot, or 1000 foot, or 5000 foot - How much voltgae could be induced? The idea is that more volatge would be induced with higher altitude and the acelerated speed of gravity. I would like to see if I could use this as a interesting scientific disseration topic. I know many factors need to be considered. number of windings in a coil. size and material…

I'm doing a science project on aerodynamics... basic aerodynamics, because while I may be good at math, freshmen in high school don't know calculus. Do any of you have some sites that are really basic, or explain the mathematical stuff in some way I might be able to understand? Any help you have would be appreciated. Thanks.

Has anyone ever built their own laser?? I want to try to make one just for the hell of it, but I am not sure how to go about getting some of the materials needed such as a quartz window, glass tubing (could i replace this with plexiglas?), a dichroic mirror, and gasses such as helium, neon, or what ever works and is cheep!

Hey peoples... i have a quick question... if i want to find the moment of inertia from a the gradient of a graph... and i have taken a whole lot of measuremants that vary time and mass... what would i do with these three equations: (i have been fiddling around with them for hours and getting nowhere, i was looking for a directly proportional realtionship but yeah....probably not the way to go i guess ) T is tension and so i suppose varies with mass h and S and r are all constant , oh and g is constant too of course equations: any help, i'd love it! Sarah

I have to create sort of a prototype i guess u wud say of the compound microscope on a metre stick. This will be done by holding lenses on top of the ruler, and magnifying the object atleast 3 times. I was planning on doing a sort of a compund microscope wid 2 lenses, each lens magnifying the object 2 times.. The one closest to the object being 200mm focal length and the one after 100mm focal length (converging lenses). I need to use the thin lens eqn (1/f = 1/di + 1/do) and the magnification eqn (M = -di/do = hi/ho) to set the object apart from the lens so in the end there wd b an image formed that wd b atleast 3X magnification of object. I need to make a scale diagram o…

Hi everyone im new here.I need to know how to work out the braking force required to a vehicle that weighs 10 tonne to a stop from 72km/h in 5m/s-2 i have to express the answer in kN. thanks.Also how do I work out braking effeiency?

Is it theoretically possible to harness a planets gravitational energy ps i am a really stupid guy compared to all of you so pls bear with me if i ask dumb qs

I was reading another topic on something like this by budullewraagh... but i want to change the circumstances where: if there is an object with a mass of, say, 80kg traveling at a rate of 50m/s, hypothetically, and it hypothetically crashes into a wall, would you happen to know, offhand, the force of impact? the object stops after it hits the wall. I was reading about F=ma and E=1/2mv^2, but im not sure how that would work.

in Newton 3, what does it mean by equal and opposite force? i mean, the force I exert on the earth is far less than what the earth exerts on me;so how can they be equal?

probably a dumb question but I read that as Force = Mass x Acceleration. shouldn`t it be force = mass x Velocity (at point of impact)? or is it for something else entirely?

can any1 explain to me conservation of momentum, how it works through a vector diagram. For example in the problem below. Ball A of mass 5.0 kg moves at a speed of 4m/s. It collides with a second stationary ball B, also of mass 5.0kg. After the collision, ball A moves off in the direction 45 degrees to the left of its orginal direction. Ball B moves off in the direction 45 degrees to the right of ball A's original direction. a. Draw a vector diagram to determine the momentum of ball A and of ball B after the collision. b. What is the speed of each ball after the collision?

For a vitally important school assignment, I have to investigate "Chewing Gum" from a physics perspective. Can anyone please suggest any experiments that I coud carry out on chewing gum? I've thought about investigating physical properties, but since they are technically a chemistry topic, i am hesitant to do this. Any help will be greatly appreciated.