Physical Quantity Analogous to Inductance
Hi, I understand that some physical quantities in electromagnetism are analogous to physical quantities in heat transfer. For instance, electric field is analogous to temperature gradient. I want to...
View ArticleDirection of radial velocity
when we need to find the direction of radial velocity should we move our right hand from the omega (angular frequency) vector to the radius vector ?or opposite ?
View ArticleField generated by a moving charge
I was reading Feynman's Lecture on Physics, chapter 28, where he mentioned the formula for the electric field generated by a moving charge. One thing I don't understand is that, if the charge moves at...
View ArticlePlease explain velocity vectors
I understand how to work with vectors but I am not yet very confident on how they work or think about them. I am working with mechanics A level. For example how would you imagine the velocity vector...
View ArticleE field between 2 wrinkled spheres, radial symmetry?
[tex]\oint E\cdot dA=|E|\int_{0}^{2\pi}\int_{0}^{\pi}(1+1/2sin6\theta\sin5\phi)^2sin\phi d\phi d\theta =|E|\int_{0}^{2\pi}(\frac{25}{99}sin^2(6\theta)+2) d\theta =|E|\frac{421\pi}{99}=[/tex]...
View ArticleCreate visible light with spinning magnet?
Let's say you have a strong spherical neodymium magnet (for the purposes of this example, let's give it a 1 cm diameter), and you were to place it on a machine which rapidly rotates the magnet. If you...
View ArticleDistance travelled of an object falling from non-negligible height
In a free-fall problem, 9.8 m/s^2 works fine as long as you stay close to the earth. However, if you are falling from very high up, the change in acceleration due to gravity is no longer negligible....
View ArticleDesigning wide angle laser coupling lens
Hi, I am trying to design a lens system with 20 degrees FOV that can focus light onto an image plane that is 0.2 mm across and the aperture is around 1 cm. Currently I am using Zemax and the design I...
View Articlewhy is normal force in the direction of vector normal?
This might be a bit philosophical, but is this just from experiment? that for a really really smooth surface, people found that the net force on an incline surface is found to be approximately in the...
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Simulating deformation from impact with static load possible?
Hi everyone, For current project at work I am looking into possibility of simulating deformation from impact with static force. Here is the input data: A ball of 0.5 kg at speed of 25 km/h crashes into...
View ArticleWhich has least entropy- living organism or same mass as chrystal?
Which has the least entropy? A 1kg diamond vs 1kg living organism I've gather that living things are generally at a state of low entropy compared to the same matter in other configurations- as though...
View ArticleWave degradation over distances
This is probably a simple question, but here is a little background from which to view the problem. A cellphone tower transmits a 4G data signal at 700Mhz to my smartphone. Assuming that it does reach...
View ArticleIncline Planes: question about distance?
Does the distance traveled by an object sliding down an incline plane pertain to the base or the hypotenuse of the triangle? My guess is the hypotenuse, but I want to make sure in order to settle this...
View ArticleDifference hamiltonian and energy
Hi I am looking for the MOST GENERAL statement that determines, when the Hamilton function and the energy are equal to each other in classical mechanics.
View ArticleApplication of Calculus in Non Continuous Physical Systems
In the mathematics of Calculus, a basic requirement is that the system or function should be continuous. Until the discovery that matter is discontinuous, applying Calculus in Physics was reasonable....
View ArticleHow did Newton discover law of gravitation
The law of gravitation states force between two point masses m and M is proportional to their product and inversely proportional to the square of distance between them. So i'm just curious to know how...
View ArticlePeak power of motor
How do you work out the peak power of a motor based on its maximum torque and rpm? I've figured out that you can get the maximum torque via (coil area) * (# turns) * (current) * (magnetic field) And I...
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Problem in Vector Resolution and Component
I cannot understand what is vector resolution.It is said in the book that ON is the resolved part of A along X axis.It is also known as the x-component of A or the horizontal component of A.Ax may be...
View ArticleRelation between Cooling rate and Viscosity in Newtonian fluid
Hi all I have a situation in the form where i have a molten Aluminium Copper alloy melt poured in a mould to be solidified. So, the mould temperature is lower than than than the poured melt. I am...
View ArticleSmoothed Particle Hydrodynamics discretization
Hi all, I want to use SPH discretization for my cooling rate but i don't know if its valid. So, this is the equation i want to discretize. L = (1/dT/dt) . ∫v(T) dT So, dT/dt = (1/L) . ∫v(T) dT dT/dt =...
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