Sudden Impacts to the Head
Hello world. I am in the process of writing my first true college essay, a ten-page piece on some topic relevant to my University Physics I course, but I need a little help finding some information....
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Heat transfer between two cylinders
Imagine two cylinders in which one cylinder in within another.(Please refer attachment) The annular space between the two cylinders is filled with air. The outer cylinder is provided with a...
View ArticleBasic Kinematics Question
The equation v22 = vo2 + 2aΔy is used to determine the change in position, acceleration, or velocity of a particle under the influence of a quadratic force. on earth, the acceleration value in this...
View ArticleResonance in action: Russian Bridge
Somebody slept through their lecture on resonance. I don't know how to link video. http://www.youtube.com/watch?v=WEQrt...eature=related...
View ArticleCoercivity of Neodymium magnets, could it be demagnetized in an MRI?
An N45 Grade Neodymium Rare Earth magnet has a remnance (Br) of 1320 mT and Coercive force (Hcj) of 923 kA/m. I am a little confused with the units of Coercive Force, how does A/m relate to...
View Articlegas behaviour
Hello, why the same quantity of different elements behave in the same way (take about 22,4 L) when they are gas and they don't when they are liquid ?
View Articlequestions on electrostatics
i have read an example on electrostatics that if anyone rub a rubber comb and wool , the rubber comb acquires the ability to attract small pieces of paper . this is due to the comb becomes negetively...
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One question about diffraction
When the electromagnetic wave propagates in air and it meets the object with the size less than the wavelength then this wave simply pass around this object and continues its way as if this object does...
View ArticleDamping: Three Basic Questions
Hello All, I have some basic damping related questions that I am hoping you all can shed some light on or suggest some resources on to someone who has taken a few undergraduate level physics courses....
View ArticleHelp finding propeller thrust.
Hello, I am working on a project regarding truss analysis on a plane and I need to find all the forces acting on the truss in order to produce static equilibrium (note that I have not yet taken fluid...
View ArticleDoes Insulator Inhibit Electric Field
Imagine an electric field created by a electricity running through a looped wire. Leaving all other variables exactly the same, would the strength of the electric field inside the loop be less if the...
View ArticleTransfer of momentum problem?
Here's an interesting puzzle: The whole scenario takes place in one dimension of space. Ball B is at rest. Ball A moves with momentum [tex]p_a[/tex] Ball A makes a perfectly elastic head-on collision...
View ArticlePressure in fluids and Pascal's law.
I have a lot of confusion and I hope someone can help me in clearing my doubts. considering a right cylindrical container with a liquid filled in ,if we take two points, y1 and y2(near the bottom) 1)...
View ArticleElectromagnetism Q
Hi, studying for exam and checking if i am doing this question correctly , Q: Cylinder radius R=1m length L=2m exists in free space with no other charges nearby. Cylinder volume is charged with uniform...
View ArticleTesla Coil Project - Need Help Please
Hi I've built a NST 15kV tesla coil and I hooked it up today and it kinda didn't work. I'm wondering if anyone would like to help me as it's a school project and needs to be finished ASAP so if anyone...
View ArticleThermodynamics: 2 heatsources together and a heatsink
I am going to create a model, with two heatsources closely spaced (Cables with a current) Covered with dirt and at a distance 1.3m from each cable there are a heatsink surround them. My problem is when...
View Articlerms voltage
If I have a wave that looks pretty much sinusoidal but the peak positive amplitide is greater than the peak negative applitude how do I calcualte the rms vlaue - is it still the peak positive amplitude...
View Articletransformer output indepedent of core permeability
I am having trouble pinning down why the relative permeability of a transformer core will not directly affect the output voltage. In fact the voltage is determined by the turns ratio and is independent...
View ArticlePoint light source
Hello everybody! There is interest in making point-like light sources, especially to measure the quality of optics, and possibly to produce optics. Here are some ways I imagine....
View ArticleDetermening the Period of Coupled Oscillators
Hello everyone, I was wondering how could you determine the period of the motion of two or more coupled oscillators. For example, two oscillators have the state variable equations:...
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