Classical Physics

Assume an object accelerating at a certain value dV/dt. If this object was traveling in a circular motion the centripetal force would increase as the object moves faster. To maintain centripetal acceleration constant while the object is accelerating (in its forward motion dV/dt) I think it would need to follow some sort of spiral path so that after a certain time the object would be traveling faster however the radius also increases.Does anybody know what type of spiral would keep centripetal acceleration constant? What formula would this spiral have?Thanks in advance for the help.

It looks interesting ideea but how he came up with it ? What did he knew ? Thanks !

Dear all, May I ask if a material over the Curie Temperature is able to generate a magnetic field? Over the Curie Temperature the material is paramagnetic, magnetically disordered... In another words, if the Earth core is 4400 °C to 6100 °C, and the Curie temperature is important for magnetic properties, may I ask if it is possible that the Earth magnetic field is generated from the Earth core? Thank you for your time.

Ok so I have not really had any problems with the homework and or sample problems to date, however this homework assignment my teacher has struggled to explain to us for whatever reason so my notes are very all over the place. This homework is not graded however it serves as our test review which will be on Monday so I want to figure this out ASAP so I can begin to practice them. Using the formulas that I currently have I would not be able to solve this unless I’m overlooking something. Thank you in advance. P.S. there should be 2 images attached

A car travelling at 30mph accelerates at a rate of -10 miles per hour per second. How long does it take to come to a stop? What is the car’s average speed during that time? How far does the car travel during that time? (b) A car travelling at 60mph accelerates at the same rate. How far does it travel before coming to a stop? How does this compare to your answer for part (a)? Can someone please show me how to solve this. I know the answers, I just want to know how to perform this problem. Thanks!

When an object hit another, molecular bonds are forced to leave each other(tear) Inner dynamic of it come from Kinetic energy which was provided by Newton's third law. F=m*a. What if there is no third law. Nothing can be damaged physically by crash or hit. If you punch of an object, no acceleration force. At the moment of hit, there is no deceleration force too which causes damage. Let say gravity pulls 1 ton iron downward. it falls however acceleration of iron is at light speed? or faster.(there is no unlimited speed) When it hits, no deceleration force to damage. It's like a photon. It would not has any weight so gravity somehow has link to 3rd law of Newton. Wor…

What if gravity is merely the absence of "dark energy". A push instead of a pull.

Scientists claim that they discovered a superinsulating state of matter. What is it actually? https://arxiv.org/pdf/1209.0530.pdf Does it imply an infinite dielectric strength, an infinite dielectric permittivity or neither? I suggest its insulating properties still can't be literally infinite, what are more realistic limits of that stuff?

Hi all, Please click on attached files to read question and see figures.

In classical electromagnetism we have two space vector fields E and H for the electric and magnetic field and a four vector made with spatial charge density and current [ρ, J] with determines EM field together with external sources and whose dynamic is affected by those E and H fields according to the Lorentz force. Classical electromagnetism assumes that each point of the charge density interacts with fields E and H and moves independently on how the rest of the charge moves (except, of course because the dynamics of the rest of the charge will affect the future EM field). However, in nature there are not infinitesimal charges that move freely, but discrete particle…

Hi Sorry for my language but I dont speak english very well and probably I have trouble understanding comments. Over a year ago Professor Jadczyk was interested me Dzanibekov's effect. https://www.youtube.com/watch?v=BGRWg4aV2mw Currently I can calculate and simulate a lot. I will use the equations because they are a universal language and they are understandable to all science on over the world. Vector product. a x b = c Perpendicular axis i ┴ j ┴ k Proportions of vectors ck=ai*bj ai=ck/bj bj=ck/ai The inverse of the vector. a(ax,ay,az)=√(ax2+ay2+az2) 1/a=a/a2=(ax/a2, ay/a2, az/a2) …

Thanks!

I know it's related to the basics of refraction,but would like to know more in-depth!Thanks!

Hi everyone, I just have a quick question that is blocking me with my studying, if I'm asked to know the order of readings on an ammeter in a circuit , and even more than one since there are several resistors , how an I suppose to know that? Even Smallest to largest .. :/ I really don't know how that work , but I'm aware that they are always connected in series . Thanks the attention !

I plan to major in physics next semester, but I want to get a head start. I was wondering if anyone could tell me the best way to go about teaching physics to myself from the ground up; perhaps a suggestion of the best physics textbook(s), video lessons, full courses, etc. (I tried looking at the MIT free courses on youtube but they seemed to use notations that the classes I plan to take will not use, and it seemed like they bounced all over the place. I also would prefer not to use Khan Academy because the material provided is extremely limited (only 1-3 10min videos on a single subject then onto the next subject. I need in-depth explanations and many examples). Tha…

Hello everyone, I want to calculate or rather simulate a particle movement by influence of a ultrasonic wave. I have read many times that I have to use the acoustic radiation force for calculating the movement of a particle but not why? At first I calculated the particle movement only with the velocity field and it doesn`t work but why? Is this only possible in the audible range of acoustic frequencies? Can you help me? Best regards

Why should the gas inside a cathode ray tube be a low pressure in order for the current to flow? (i.e the cathode rays) Why don't the rays appear when there is a gas at normal pressure inside the tube?

If you had a rotating body generating large amounts of centrifugal inertia, but used electromagnets to balance the centripetal force, releasing isolated portions of that centripetal force in tangent to rotation, could that cause the angular momentum to be transformed to linear momentum? That displacement could accelerate mass off the ground.

As students, we have been taught that "mass can neither be created nor destroyed". So, how did the universe form? What I mean is if Law of conservation of mass is applicable, Then there is no way for the Planets, Stars, Nebulae, etc. to be created. Please Explain....

Hey, I've run into a minor question I've had while trying to work out the physics for my rockets and building others. Mainly because I live in a fairly populated place and launching my rockets off of basic math isn't as accurate as I'd like. Let's say I have a model rocket about 20 inches tall weighing about 5 pounds. It deploys a parachute, and it's decent rate is 15 feet per second. If the wind is blowing south east at 5 miles per hour, how can I calculate how far it will drift per foot in altitude that it loses? Let's set a basic height it's expected to reach at 750 feet. How far in which direction should I expect it to land? And how many deg…

The space shuttle orbits 300 km above Earth surface , that has radius 6400 km . What is the gravitational acceleration experienced by the space shuttle ? Answer is 8.9 m/s^2 . I'm trying to equal mv ^2 / r = mMG/r^2 , where v^2/r is "a", so that I get a= mMG/r .. and I put r= 6400+300 but it isn't correct.. just a hint would be great , thank you in advance!

If I have two charges 2q and -3q , at 0 m and 5 m on the x axis respectively, where on this x axis the electric potential has zero value ? I'm trying to figure this out thinking about the fact that it can't be half of the distance between them .. so 2.5 m because otherwise they should have same charges .. but other than that I can't .. it should be 2 m..

Recently I was made aware of papers by a Russian institute which claims to have performed more precise calculations of the oscillations of the Earth's axis. The result (emphasis mine): "[..] this problem is solved here without simplification. The calculations demonstrate significant oscillation of the Earth’s axis. These results were confirmed with other three independent solutions of the Earth’s rotation problem. [..]" The paper suggests great confidence: "Thus, miscellaneous tests and verifications of the initial method of solving the Earth rotation problem, as well as independent solutions of this problem using three other methods, confirmed that t…

Dont the em waves propagate through the air and pass through other electronic devices? Wouldnt that cause malfunctions? Please explain. Thanks.

Trying to clear my doubts before my test. Thank you!