Two ways to calculate the final speed of a rotating cylinder
Situation: A uniform cylinder (Mass [itex]M[/itex], Radius [itex]R[/itex]) is rotating down a slope of incline [itex]θ[/itex] and distance [itex] s[/itex], there are two methods which I used to...
View Articlewhy classics assumed that the force constant in two different references frames?
hi every one :) i need a small help please ... we have tow frames and tow observers , let suppose there is a force on an object in one of the frames , so from newton law: f=ma "a" depend on "x"...
View ArticleThermodynamics: External vs Internal Pressure
Suppose in a piston in which there is a gas, the gas exerts pressure P on surroundings, whereas the surrounding exerts a pressure P[ext] on the gas. In order for the gas to expand, P must be greater...
View ArticleTension, FB diagrams and some formula questions.
Ok this will be a long post, sorry in advance. I am an online student of a university and the help I am getting from them is ridiculous, I am also using a book called quicksmart introductory physics,...
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Hypocycloid Equations required to form system of three rotating circles
Hi there, I have never worked with Hypocycloids before so I'm unsure which equations I should be using; but I'll try and get across what I am trying to build. Essentially I am trying to create a series...
View Articlecharged particles through magnetic field
I have a question that I want to verify , so that i know is my understanding about how the LHC works. So basically there is this charged particle being thrown into a huge lone tube consisting of...
View ArticleProblems in understanding a paper; What is the isothermal expansion coefficient
Hello everyone, I am currently trying to completely understand this paper: http://jcp.aip.org/resource/1/jcpsa6/v50/i3/p1103_s1 On the third page of the paper (p. 1105), the authors use the quantity...
View Articlebasic lineal motion formulas
One thing I enjoy as a new physics student is using formulas. I have been playing with the fundamental formulas in terms of units rather than their names. That is instead of a=v/t m/s/s=(m/s)/s or v=at...
View ArticleCountercurrent condensation loop
I will be attempting to make liquid nitrogen from air. Part of the process involves passing air compressed to 200 atm through a coil and rapidly expanding it. The expanded air that does not form liquid...
View Articlewhy an exact perpendicular force at one end of a rigid rod cause translatory...
Why does a force applied exactly perpendicular to one end of a rigid rod produce translatory motion along with rotational motion about center of mass? I know the mathematics F=m(center of mass)*a but I...
View Articlework on constant-velocity objects
I'm learning about Work for the first time. Work = (force) x (distance moved in the direction of the force) I understand what work is when it comes to lifting objects. but if you had an object moving...
View ArticleThermodynamic processes and the relationships between the quantities they...
Adiabatic process: a process where no heat is gained or lost. it is my understanding, however, that this is a hypothetical system. There is no insulator on earth good enough to allow this system to...
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Question on Bmax in magnetics
I don't understand what the book said. See attached page, 1) The Red underlined section. I don't understand why B will be at it's max negative value at the beginning of the cycle assume it is sine wave...
View ArticleHigh level defintion of electromagnetic radiation?
Can someone give me a high level defintion of electromagnetic radiation with some intuition on what the wave form represents (specifically the peaks and valleys)? I am comfortable with the electric and...
View Articlegibbs
Why do we integrate equation to get equation with logarithm?That means this equation:G=ΔG+RTln[C][D]/[A][ B].Why have to be there logarithm?What would happens,if there wasn t? thanks.
View ArticleBalanced and Unbalanced Forces
Hey guys, So today I was in my Physics lab and a small argument arose. We had a pre-test with a question that stated: "Jan pushes on a refrigerator just enough to barely get it to move at a constant...
View ArticleWhy doesn't a moving bicycle fall?
I have always had this question and I have received various answers from angular momentum conservation to gyroscopic effect. But I couldn't really understand the principle. Also, why it becomes easier...
View ArticleCoulomb's Law Generalized
For calculating the force on a continuous charge distribution due to another continuous charge distribution, if F=kdqdq'/r^2 would you simply integrate first over dq' and then dq?
View ArticleImbalanced ball's affect on static friction
Given a circle with a point mass attached, what is the relationship between the linear force and the force of static friction as it rolls without slipping? Each force diagram I made...
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Finding the Force Applied to a Heavy Bag
I have a heavy bag and I was wondering if I could find out how much force is applied when I kick it. Here's a picture describing of the problem: If some amount of force is applied that causes the bag...
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