Not having a good understanding of Gauss's Law
Hello, So I had been studying Gauss's Law yesterday, and I still don't feel like I have an excellent grasp of it. I wonder, why is it when there is cylindrical symmetry, sometimes it seems you need to...
View ArticleTorque, point or axis of rotation
Hi, 1) Do we calculate torque with respect to a point or with respect to an axis? I have read them both in different resources, and so I am confused!! 2) If we calculate torque with respect to an axis,...
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Projectile Motion 2.0- Drag in RL
So I'm writing a Scientific Lab Inquiry (college research lab write up), and my professor pointed out a major error in my assumption of air/mathematics but I can't for the life of me figure out what is...
View ArticleCondensers connected in series
Question 1: Two condensers connected in series will be charged such that one gets +Q charge on one of its plates, and the other -Q. Schematic: ------(-Q)| |(a)------(b)| |(+Q)------- Can somebody prove...
View ArticleTwo wires with current - would this be correct?
While chatting with a friend, I came up with something to think about, being, "if two parallel wires, with constant and equal current wrt position, are put next to each other, the charges in the wires...
View ArticleTheremin Hand Capacitance Approximation Needed!
I've been working on a Theremin Excel simulation for the past couple of months. For those who don't know what a Theremin is, it was one of the very first electronic instruments to be invented, and has...
View ArticleDo all reversible engines become heat pumps?
I have a cycle (and the gas is ideal) that starts at Pressure=4Po Volume=Vo and and Temperature=Th. First step it's cooled at constant volume to Tc and Po; Second step, it is reheated at constant...
View ArticleIsing model canonical partition function
Why in case of Ising model ##H=-J\sum S_iS_{i+1}## we calculate canonical partition function?
View ArticleColoured light on complementary surface
I have observed the following phenomenon: When I shine coloured light (say red) on a surface that has its complementary colour (in this case green) it becomes significantly less saturated (even to the...
View ArticleSituations where torque does no work
I would like to know all the different situations where torque does no work. So far I only know that torque can do no work when it is balanced. Is there any other ways torque can do zero work?
View ArticleHow does voltage affect particles in current
So, I have a problem visualizing effect of voltage on the current in a circuit. Here goes: -Intensity (I) of a current is a ratio of charge traveling through a cross section of a conductor, and time....
View ArticleProof for projectile motion
A body is thrown horizontally from a cliff with an initial horizontal speed. It hits the ground at a distance X from its initial position. It is said that the displacement = horizontal speed * time....
View ArticleTennis racquet swingweight
Hello. I'am a scientific student in Paris / France. I am doing a small research about the importance of the swingweight (= Moment Of Inertia) of tennis rackets with 3 goals : . to define a calculation...
View Articlepumping water versus expulsion
Does it take the same amount of energy to lift water out of a tank as it would to force it out using compressed air? For example if there is a cylindrical tank that is 14 meters tall, 10 meters wide...
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Diffraction and intensity of fringes
I'm not sure if I've understood my textbook correctly. Can you tell me if my current understanding is correct: - in a single slit diffraction theres a wide central fringe which is twice as wide as all...
View ArticleHow to explain there cannot be a case where r=0 in F=G(Mm/r^2)
Hi. This is my first post here. In one of our science groups in Facebook, a member is asking about a case where r=0 in Newton's Equation F=G(Mm/r^2) The best i could do was to state that there cannot...
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Potential Energy of a Spring Contradiction?
Hi everyone, I'm a bit confused about the concept of the potential energy. Let's say we have the following scenarios here: In the first scenario, we have two identical springs with spring constant 5000...
View Articlepurpose of natural log in gibbs free energy equation
Hi,Im just beginner and I m trying to learn integrals.I m just in starting phase,but still in few tences,not details...How or why we get logarithm in gibbs free energy equation?Because of integration...
View ArticleDivergence of velocity of incompressible fluid in uniform gravity
Hi! The velocity field as a function of poisition of an incompressible fluid in a uniform acceleration field, such as a waterfall accelerated by gravity can be found as follows: The position is...
View ArticleThermodynamics: Steam Tables
A compressor adiabatically and reversibly compresses a mixture of saturated water and steam from a pressure 1.02 bar and specific volume of 1.25 m^3/kg to 0.473 m^3/kg. Calculate the fraction of steam...
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