Pi Definition and 514 Threads

Greetings I'm currently designing a lab-script intended for comprehension and use at an undergraduate level. I was extremely frustrated during my undergrad to be dealing with a plethora of uninspired and dull experiments so I decided to take a slightly unconventional (or extremely conventional...

(1) Is there a pi in ellipse entity?Why not or yes? (2) Is there a pi in polygons entities (e.g square)? not or yes? (3) If there is pi in some geometries and other not - What is the reason to that? (4) How cloud I know that are no hidden formula of pi in a square figure that the expression in...

we know a couple of approximate values of $\pi$ mostly $\frac{22}{7}$ and $\frac{355}{133}$ but one I found (from the net )interesting was sum of 2 surds $\sqrt{2} + \sqrt{3}$.if anyone is aware of other of interesting observation kindly let me know.

So far i have. 12) area of full circle is πr² area of sector is (120/360)(πr²) or 12π 13) same area is (270/360)(πr²) Am i correct?

So far i have 270/360× (pi)r^ i don't know what to do next please help.

Homework Statement Hi, I have a confusion in knowing Pi in the equations attached. Eq are related to the Topic Discrete Random Variables in the context of Probability lecture I also can't understand what is P(Y=y|Pi)? Homework Equations Eq are attached The Attempt at a Solution I can't...

Hello, can someone show me how 2.158 radians can also be written as .687pi? I need to learn how to do this so I can write my answer in terms of pi as opposed to 2.158. Thank you in advance. Yeny

$$\int_{0}^{\pi\over 2}{\ln(\sin^2 x)\over \sin(2x)}\cdot \sqrt[5]{\tan(x)}\mathrm dx=-5\phi \pi$$ $\phi$ is the golden ratio Any help, please. Thank you!

Just a thought I had one day, but the general idea I've heard is that quantum mechanics has a random property to it. The number Pi is apparently a number without any sort of apparent pattern to it either, seemingly random? Could these two things somehow be related? For example somehow...

Pir2 (I am looking in the greek alphabet and geometry symbols and can not find the symbol for pi that looks anything like pi when in preview mode) Sorry. If Pi is the ratio of a circumference to the diameter of a circle and geometrically this gives the perfect measurement of a circumference...

Pi day is tomorrow! 3.14! What is your most interesting fact or insight about the number Pi?

Im trying to do some data logging, using a raspberry pi 3 would be super easy as it has a built in WiFi and Bluetooth receiver as well as an SD card. However when the vacuum gets to about -30inHg the Pi shuts off and the red light starts flashing as if there is no OS. Temperatures arent crazy...

Hey guys, I'm confused as to the difference between the h-parameters usually given by datasheets and their hybrid-pi model analogues. For instance, I know hfe = Beta in small signal analysis, but what about the other h-parameters. Thanks for any help with clarifying this.

Homework Statement A K meson (an elementary particle with approximately 500 Mev rest mass) traveling through the laboratory breaks up into two Pi mesons (elementary particles with 140 Mev rest energies). One of the Pi mesons is left at rest. What is the total energy of the remaining Pi meson...

I am a novice and new to bonding and there are a few clarifications I need. 1) Does a single covalent bond always mean a sigma bond? 2) Does a double covalent bond always mean 1 sigma and 1 pi? 3) And does a triple covalent bond always mean 1 sigma and 2 pi bonds?

I had a question related to modelling in Matlab. Will there be an interference in output signals when there are two PI controllers working parallely. the input for both PI controllers is the same. the output signals are different as the P and I gains given to both are different. Note: there is...

I tried to derivate pi using calculus but i just found a quite different result. Can you spot my wrong please?First i started with equlation of a circle which is: $$x^2+y^2=r^2$$ I am assuming circle's center stands on the center of origin. To reach pi we shoud consider the situation that...

In my chemistry study material a set of rules to draw resonance structures are given. They are: (1) Only electrons move. The nuclei of the atoms never move. (2) The only electrons that can move are pi electrons (electrons in pi bonds) and lone-pair electrons. (3) The total number of electrons...

This is the problem I'm currently working on: The pi groups I identified were h1, h2, d, D, g, t, and velocity, but when I looked at the solution, it selected Δh, D, t, ρ, d, ϒ, h1, with no explanation why those variables are needed. If I was solving with the Bernoulli equation, I wouldn't...

Below is the partial code to plot the rejection/accept regions using monte carlo sampling. The context is to estimate pi and plotting is just one part of it. I'm not sure how the ~ symbol can work. scatter(samples(1,~reject),samples(2,~reject),'b.')...

Hello, i need you help to give me the idea and information about my project. I not familiar with this device, B101 HDMI to csi-2 converter. What i understood that this device can be a hdmi input on Raspberry pi. Based on my project, i need to communicate the Tv and Raspberry pi. In raspberry Pi...

Homework Statement http://i.imgur.com/HunOeH0.png Homework Equations MO model The Attempt at a Solution as far as i know, number of pi bond is equal to 3 - the "power" of p (the hybridized bond formed) the answer "4" is only calculated from the 4 elements' bond in part b, so why the central...

Hello, so while i was doing my own revision. When putting tan^-1(1/-√3) i receive the answer as -30. however, (im doing demovoier's theorem) in the revision book it says the answer should be 5π/6 . Help to brighten me? thanks.

My professor drew the following molecule on the board and asked us how many pi electrons this aromatic molecule has. Everyone in the class said 14, as there are 7 double bonds, with two pi electrons from each bond. He told us that there are only 10 pi electrons in this molecule, refused...

I would like to start building small electrical projects but it's been a very long time since I studied circuit analysis in college. I figured that there are probably some computer programs that would help people like myself to design simple circuits. A quick Google search led me to this site...

Today is the bi...g day. Happy pi day everyone.

May I know how to make multiple client connected to a server in python language. I want to communicate one Raspberry Pi to other Raspberry Pi using the python. What I knew, it need to used function socket. i will explain my project. There are contain 5 clients and 1 server. A server will open...

I got the solution how Raspberry Pi connected to the RS232 port. Raspberry Pi's port is USB. By using the chmod, stty and echo commands.Using the RS232 converter to the USB port.

Mentor note: Split the thread in two parts, the other part is here: When (and Why) Does a Human Baby's Vision "Flip". This thread discusses the inversion of human vision, "up/down", "left/right" and 180 degree rotations. Greetings to all, I realize that there is another "dead thread" about this...

Homework Statement Let ##f : [0, 2 \pi) \rightarrow S^1##, where ##S^1## denotes the unit circle in plane, and ##f(x) := (\cos x, \sin x)##. I am trying to prove various properties of this map, the first of which is showing continuity. Homework Equations A function ##f : M \rightarrow N##...

Hi everyone, i need help you all to give me the where can i find the source about my project. I need to connect the raspberry Pi 3 to the hdmi switcher. so i can change the from hdmi to another hdmi. what i know, the connection of them need to be used by RS323. In the raspberry pi , i will...

Hey there! I found myself being rather curious as to what a reality would look like where PI to equal 3, instead of 3.14... Uploaded a picture, was wondering if anyone able to get their head around it is also able to draw or explain the key differences. Thanks! <3

Homework Statement A charged π meson (rest mass = 273me) decays into a neutrino (zero rest mass) and a μ meson (rest mass = 207me). Find the kinetic energies of the neutrino and the mu meson. Homework Equations E = moγc2 K = mo(γ-1)c2 v = pc2/E p = moγv The Attempt at a Solution In the rest...

Homework Statement The formula for centripetal acceleration (Ac) is $$Ac = \frac {4π^2r} {T^2},$$ where r = radius and T = period of rotation Homework Equations The above formula can be rearranged as follows: $$Ac = \frac {2π} {T} × \frac {2π} {T} × \frac {r} {1},$$ $$= \frac {2π} {T} × \frac...

Most than a question, I'd like to show you what I've got to understand and I want you to tell me what do you think about it. I'm not a math expert, I just beginning to study maths, and I'm reading Elements by Euclids, and I've been doing some research on immeasurable numbers. My statement is...

Hello. I have a following C programming language code that blinks an LED ON and OFF. #include<bcm2835.h> #define LED RPI_GPIO_P1_12 int main(int argc, char **argv) { if(!bcm2835_init()) return 1; bcm2835_gpio_fsel(LED, BCM2835_GPIO_FSEL_OUTP); unsigned int delay(1000); while(1)...

\sin{(\pi x)}>\cos{(\pi \sqrt{x})} I don't know how to solve this. I would really appreciate some help. I tried to do something, but didn't get anything. If I move cos to the left side, I can't apply formulas for sum. Since arguments of sin and cos have \pi , I think there is no way I can...

Mt. Vesuvius in Pompeii was a conic volcano with a height from its base 7950 feet and a base radius of 2300 feet. In 79 AD, the volcano erupted, reducing its height to 4200 feet . Find the volume of the volcano after 79 AD in terms of pi. WORK: Volume of Volcano(Before 79AD)= \pi *r^2*h/3...

:cool::cool:206.8.3.9 $\displaystyle I_9=\int_{0}^{\pi} \sin^4\left({\theta}\right) \,d\theta =\frac{3\pi}{8}$ $$I_9 =\int_{0}^{\pi} \frac{(1-\cos\left({2\theta}\right))^2}{4}\,d\theta $$ Expand $$\displaystyle I_9 =\frac{1}{4}\left[ \int 1 \,d\theta -2\int \cos\left({2\theta}\right)...

If you divided the circumference of an infinitely large circle by its diameter, would the result be pi?

22/7 has rolled around again here's a starter ...

Hello, I'm trying to make a project and I have a trouble. The project is 'online monitoring of machine'. I will show ON if machine works and OFF if machine does not work. And the rule is: I can not effect machine by my circuit. So it looks so simple. I bought SCT-013 non-invasive current sensor...

Homework Statement in this problem , the author make π1 = D(dp/ dx) / ρ( V^2) , and make π3 as μ/ ρVD , how if i want to make μ/ ρVD (reciprocal of reynold number ) as π1 and make D(dp/ dx) / ρ( V^2) as π3 ? Homework EquationsThe Attempt at a Solution since we know that π1 is function of (...

Has anyone every discovered any patterns in pi such as...every 97th digit is a 3? or something similar? I know there is no repeatable pattern of digits but is there anything that precludes other patterns such as the above? tex

I was wondering, how can I derive pi without fancy math (fancy meaning too complex. I'm not taking out calculus or trig or anything, just not too advance concepts). Can anyone help me out?

g(t)=½( f(t)+f(-t) ) h(t)=½( f(t)-f(-t) ) show its 2π periodic so: g(t+2π) = ½( f(t+2π)+f(t-2π) ) why does -t become t-2π ? ½( f(t)+f(-t) ) = g(t) h(t+2π)=½( f(t+2π)-f(t-2π) ) ½( f(t)-f(-t) ) = h(t) is this correct? can...

Ok, This probably seems a silly question, but has there been any 'serious' attempt to measure Pi PHYSICALLY, like in a lab, using say a light fiber in a circle and one down the radius? If so, where can I find the results/paper? Thanks!

Ever since the discovery of Pi, Mathematicians have been obsessed with finding methods of approximating Pi. I think I've a unique way of doing so via the Newton-Raphson. Newton-Raphson Formula: Let ## ƒ(x)=Sin(x) ⇒ ƒ'(x)=Cos(x) ⇒ X_n= X_{n-1} - tan(X_{n-1})## For example: Let ##X_0=X ⇒ X_3=...

Homework Statement https://projects.exeter.ac.uk/fluidflow/Courses/FluidDynamics3211-2/DimensionalAnalysis/dimensionalLecturese4.htmlaccording to this link , when we form the pi group , we need to put an exponent for the non-repeating variable ,( in this case , delta P is non-repeating variable...

Homework Statement i was told by my lecturer that when we choose the repeating variables in pi buckingham theorem , we can choose based on 3 property , which is geometry property which consists of (length , width and area) , then followed by flow property ( velocity , acceleartion, discharge)...