Recent content by DaveC49

Evolution The Whole Story Ed Steve Parker (https://thamesandhudson.com/evolution-the-whole-story-9780500291733) Selected papers on Quantum Electrodynamics julian Schwinger (https://store.doverpublications.com/0486604446.html) historical persepective on development of QED.

I found having a good grounding in Calculus, ODE's, Linear Algebra, Vector spaces, Group Theory, Numerical method were the maths couses I found most useful for Physics. I also did introductory computer science subjects at first year level and 1st semester 2nd year which proved useful. Like...

In your simulation you use an arbitrary increase by a factor of 10 for the induced field within the ferrite core. Have you tried looking up the relative permeability of ferrite (it is more like 640)? Your approach of linear amplification of the induced field within the ferrite does not deal with...

Do you mean permitttivity rather than permissivity? Look up the definitions. You may find this link useful...

matt4584 the classic observation of this is the Michelson Morley experiment where light beams were sent parallel to the rotation of the surface Earth which is also pretty close to the direction of motion of the Earth about the sun and normal to the direction of rotation of the Earth and its...

Einstein's 1905 paper is very instructive about the thought that lead to establishing that light is quantized. An english translation is available in Stephen Hawking's 2011 book "The Dreams That Stuff Is Made Of".

You could start by making some simplifying assumptions. I.e. perfectly insulating walls, no heat loss through the surface to get a first order solution and then introduce heat losses as a second order problem. In this case since the flow rates from both hoses are the same. Q=Q1 + Q2 = m c T1 + m...

http://www.real-world-physics-problems.com/physics-of-billiards.html

Why do you classify Case 2 or even Case3 as necessarily inelastic? The kinetic energy before the collision is exactly the same as the kinetic energy after the collision in Case 2, therefore the collision must be elastic. This does however require a third process which causes the two balls to...

You have stated that this is an inelastic collision, therefore energy is not conserved and must be lost from the system by definition. Assuming your bodies are finite objects, the most likely route for energy loss would be in the deformation of the objects (depending on the nature of the objects...

Why would you need to? The point is to build a scale model of the actual device. You can use a couple of fingers to simulate your running person. You have much more serious geometric problems with the shape of the tread than anything else, particularly if as you suggest it is an inelastic material.

You have a problem with the translation from a 2D section to the 3D object. The distance from the centre of your device to any point on the periphery of your tread has to be constant which means that the surface of the track has to be spherical, not a flattened sphere, if it is inelastic. A...

Exactly as you did it above or you could use I1* 47+I2*5 or -I1*15 +10V+I2*5 which should all give you the same result. I.e. no matter which path you use between A and B the voltage difference should be the same.

To sustain a chain reaction each individual reaction must produce at least one more reaction so at least one of the three neutrons released in a reaction must result in another fission reaction for the reaction to be sustained. The released neutrons will normally be highly energetic fast...