# udiboy

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bio website none location Mumbai, India age 17 member for 1 years, 9 months seen yesterday profile views 263

A student and enthusiastic programmer. Love learning Physics! And I make android apps as a hobby.

This will make a great and interesting site : Puzzling. Please follow it

Please support Mechanical Engineering. There are many questions on PhysicsSE site related to engineering, which do not get answered because they are off-topic.

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 2d asked Problem in the Ladder paradox in relativity? Apr7 comment Why can two (or more) electric field lines never cross? If I had a penny for every time this question was asked on this site (not directly, so I don't think this could be a duplicate) Mar28 reviewed Approve suggested edit on Two vehicles moving in a line with different accelerations Mar25 comment Simultaneous Charging and Discharging Capacitor You have got the concept of a capacitor horribly wrong. A capacitor in the very basic sense is two conducting plates placed parallel to and not touching each other. When you apply a potential difference across these plates, charge accumulates on them and the capacitor gets charged. Mar25 comment Why $A\sin(2\pi ft) =\frac{A}{2j}(e^{j2\pi ft}-e^{-j2\pi ft})$ but not $\frac{A}{2}(e^{j2\pi ft}-e^{-j2\pi ft})$? This is a math question dealing with basics about complex numbers. You should post it on math.stackexchange.com Mar24 comment How do I see things of the bright room, being in the dark room? Great 10 second video by minutephysics, related to you question: youtube.com/watch?v=VvqbjUtt3mM Mar24 reviewed Approve suggested edit on How clean will first generation fusion reactors be compared to fission reactors? Mar24 comment Free fall from space ZilbermanRafael What is happening here is that the acceleration $a$ is changing with $r$ when you go to a large height of 500km. Near the surface, this acceleration is equal to $g=-10m/s^2$ and it is approximately constant for small heights. To solve your problem what you have to do is use $GM/r^2$ as you acceleration, and then proceed with solving the differential equation in $r$ and $t$. As @garyp suggests, this requires a certain level of knowledge in calculus. Mar24 reviewed Close Aerodynamics and thermodynamic Mar24 comment How does a Photocell/Photoresistor work? Did you read Wikipedia? It explains the basic functioning of an LDR quite well. If you want a more detailed explanation probably about the function of CdS , specify it in the question. Mar24 answered Why is centrifugal 'force' perpendicular to line of inertia Mar23 comment Equation of motion for a falling rod (with one end touching a frictionless surface) @Austin Gravity isn't the only force on the rod, there is a normal force on the rod too from the ground. Mar23 awarded Deputy Mar23 revised Can effect of gravity be broken (counteracted) by electric force? Fixed typos and grammar Mar23 comment Where is the basketball event horizon? I haven't checked the math, and there is a chance this is not possible. I leave that for you to determine. Mar23 answered Where is the basketball event horizon? Mar23 reviewed No Action Needed Computing the Electric and Magnetic Field Distribution of a Funnel Waveguide Mar23 comment Can effect of gravity be broken (counteracted) by electric force? Kinda like Millikan's Oil Drop Experiment ? Mar23 comment Choosing proper centripedal force in Newtonian gravitational forces What you need is a proper scale-down factor to try and fit large orbits of satellites around the earth onto your screen so everything is visible properly. What you need to scale-down here is not earth's mass, but the radii of the orbits. So let the mass of the earth be the same, and also the definition of other units, and try to simulate the exact distances which would exist. Then scale-down to make the simulation fit your screen (eg. 500 mtrs -> 50 pixels) Mar23 revised Where does gravity get its energy from? Fixed typo