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Answer 1:The drag force in the car during the forward acceleration is mainly inertia and friction. The air resistance is taken into consideration only at high speeds. The air resistance will increase due to fluid dynamics but the frictional force will remain constant. Rolling friction is proportional to Weight of the car not the speed and ...

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Answer 1: The Air drag increases as the car accelerates, the Air drag is usually a complicated expression which can be approximated to be $$F_d=bv$$ where $b$ is a parameter that depends on the the structure or the area of the car, and $v$ is the velocity, The friction or rolling friction in particular doesn't depend on speed, It'll remain constant Answer ...

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Nick Moore clicked it for my 12 year old daughter. She understands and can explain Lorentz Force very clearly and simply with little to no effort. She started Breezing through most of the technical data for her 6th grade science project on the Homopolar Motor. The Earth's magnetic field makes sense to her now. She gets how the northern lights are formed and ...

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For advanced undergraduate courses (usually the second semester of engineering EM), these are the references my professor had used. They're focused for RF / microwave engineering folks, particularly the antenna community. Balanis is probably stretching the "ugrad" context but is still usable in certain instances. Ramos's Fields and Waves in Communications ...

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I like that this question is asking for some intuitive justification and calling for more understanding in error analysis. Too often, that's left out. From a teaching perspective, I think what's most important is that students come up with their own procedure, that's it's reasonable, and that they justify it. This encourages them to do the same sort of ...

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I beleive when people say "I want to learn quantum mechanics" what they actually mean is not quantum mechanics but rather quantum physics or more generally modern physics. Please do not get me wrong but learning quantum mechanics is of no use if you do not need to calculate the band structure of a semiconductor or half life of a radiactive isotope or the ...

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Can it be explained in a way that an 8 year old can understand? First demonstrate that there exist limits to velocities in various situations. Take a floating balloon and start adding hanging weights. For a fixed weight there is a terminal velocity, dependent of the size and weight of the balloon-weight system. This can be explained by the reaction ...

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I think a good way to approach this is as follows: An object moving at some finite speed needs to have a speed relative to something. You can't say you are moving at 3m/s without saying what you're moving relative to. This is not the case with the speed of light. When something moves at the speed of light it does so relative to everything. The resaon ...

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I would say there are 2 paths for explanations: for rockets-like problems you have to go into the relativity stuff, with the contraction of time and length which are just a fact. From that, it's explain everything, from paradoxs, differences from inside and outside, and extra cost of the last "pushes". (just saying alone that puffs get costlier and cause a ...

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