Need help with Newton's Laws, basic Physics
Hi, I am taking a highschool physics course, and there are a few points at which I am getting a bit of confusion. My first area of confusion relates to Newton's Laws. There are a few scenarios in which...
View ArticleHeat transfer from gas to gas?
I am wondering if there is any way or formula to find Heat transfer from a fix volume of gas that is release into a sealed room. Eg. 1m^3 of 37 degree gas is released into a 100m^3 room which has a...
View ArticleReversed Carnot Cycle
What happens in a reversed carnot cycle? I mean in refrigerators.The gas is adiabatically compressed so that it's temperature rises.Then it is isothermally compressed so that the heat is rejected to...
View ArticleAcoustic standing waves with an open far end
My textbook says Quote: If the far end of the tube is not sealed, standing waves can still be established in the tube, because sound waves can be reflected from the open air. I'm confused by this,...
View ArticleVapor Pressure and non ideal gases
Hi, I understand that vapor pressure is independent of initial pressure, and depends only on temperature. However, is this true of a non ideal gas at high pressures? (I am specifically interested in...
View ArticleUnits of loudness of sound, being a subjective quantity
I am learning sound. My teachers and textbook say loudness of sound is a subjective quantity, it is different for every person, while intensity is the objective quantity. The first section says...
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cycloid pendulum (Huygens)
"Huygens' ingenious idea, which he put into practice, was to vary the eective length of the pendulum by allowing its cord to wrap partially around an obstruction as it swings" the coordinates of...
View ArticleForces in a head on collision
Hello. I'm a writer going back and doing some fact checking to make an important scene more believable. It involves a character, Lux in the backseat of a jeep which has just suffered a head on...
View ArticleCan someone better explain how motion affects an electric field?
I am reading through the Feynman lectures in my spare times (the parts that interest me, anyway). The book and it's explanations are usually high quality, although unfortunately I have come across a...
View ArticleDoppler Effect Relative Motion
To calculate the detected frequency from the source frequency, we use this formula: [itex]{ f }_{ D }=\frac { v\pm { v }_{ D } }{ v\pm { v }_{ s } } { f }_{ s }[/itex] where [itex]{v}_{s},...
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Irreversible Quasistatic PV Work
Hi 1) I am reading Pippard's Classical Thermodynamics and was confused by one of his examples in the attachment. What I do not understand is the concept of using P' (I am thinking P' as = P_fric +...
View ArticleProblem with inelastic collision
Two masses [itex] m_1 [/itex] and [itex] m_2 [/itex] are closing each other with speeds [itex] v_1 [/itex] and [itex] v_2 [/itex]. The coefficient of restitution is e. Calculate the amount of kinetic...
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Masses on an inclined plane and their Lagrangian
Consider the configuration below shown in the attached picture! The wedge can slide on the inclined plane and the cube on the wedge.Their motion is described by [itex] x_1 [/itex] and [itex] x_2...
View Articlee.o.m. for a particle in a sphere of dust
I am looking for the e.o.m. of a particle moving inside a sphere of homogeneous dust with density ρ. I start with the Lagrangian (in cartesian coordinates with i=1,2,3) [tex]L = \frac{m}{2}\dot{x}_i^2...
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Lagrangian of 1D motion
i have L of particle m in 1D motion, but how i can find the coordinate of particle x at time t?????? Attached Files Doc1.docx (102.1 KB)
View ArticleEikonal equation and trajectory of a ray of light
On page 122 of Born and Wolf's "Principles of Optics" the following equation for the trajectory of a ray of light is glibly derived in association with the eikonal equation. [tex]\frac{d}{d \bf s} (n...
View ArticleScalar or pseudoscalar?
If an electrically charged particle is a scalar, and a magnetically charged particle is a pseudoscalar, then what is a dyon (having both types of charge), a "mixed-type" scalar? Are there "scalar-like"...
View ArticleSpeed of Ripples in a Pond
Do the speed of the ripples, or waves, in a pond depend on the weight of the pebble thrown into the water? I would think the answer is no since it should only depend on the properties of the water....
View ArticleNewton's third law confusion!?!
If A exerts some force on B then it experiences a force of same magnitude and in opposite direction. This didn't seem intuitive to me so I thought of it this way, Let A and B be a single system. Now...
View ArticleCalculating 0-60 mph time for a vehicle
After figuring out how to calculate Cd and Crr coefficients, I'd like to continue my "vehicle physics exploration": I'd like to determine how much it takes to go from 0 to 60 mph depending on engine...
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