Pitch Definition and 119 Threads

"When you stroke the top edge of a crystal wine glass half full of wine, a musical tone is produced. Is the wine mass part of the determinate of pitch? Is the water vibrating at that pitch?" I asked asked ChatGPT this question. It did not call me an idiot for posting a questionably formed...

what is pitch controlled tapping? anyone can enlighten me.

I'm interested in making some shock absorbant material to make a robot from. I've got the main idea down, you just keep inject chlorine ions into refluxing glycerine and it eventually becomes glycerine poly chloride, taking about a week. I have things I need to iron out about it. a) if I do...

Sometimes there are commercials that have pitches based on some scientific thing. Here is one I like about the car's stability based on the chicken's (well known) ability to keep its head stable when its body moves in some way. (Probably based on both visual and proprioception of its body...

I honestly have such a dumb question- it says “a pitch angle” but cannot find that in relation to a helix. It is not defined in the textbook. Looking on google I found a helix angle, but is that different than the pitch angle? Can anyone draw me a picture of where the pitch angle is? I assumed...

Hi, does anyone know how to calculate the current spring constant of a variable pitch spring when under compression. Since some of its coils get inactive when compressed the stiffness is increasing and consequently “k” is changing as well, is there an equation I can use to calculate the new...

Hi all. I'm new to this forum and to wind turbine technology in general, and I watched one of these one-minute videos explaining why wind turbines pitch their blades but it doesn not make sense to me. Why don't you just get a bigger generator? You'd get more energy for the same blades, same...

I was trying to search but found no results. Is there a way to calculate how frequency will change if I stretch a string by certain amount (0.14 mm in my case)? I found out I can measure its frequency once stretched, but no results as of how to estimate new frequency ahead of the time. I know a...

Hi, I’ve read a set of coordinate elements: „roll, pitch and heading“ for aircrafts. What’s the difference to „roll, pitch and yaw“? Senmeis

Is it possible to pitch a ball as a fastball (e.g. like in baseball) and have the ball rise to a near vertical and then fall back down to the ground. The ball would obviously have an altered design/features to cause it to lift/rise, but just wondering whether that sounds like something that...

Summary:: How is the pitch axis location of an aerodynamic profile decided? Hi, I drew a wind turbine blade in a CAD software. I used information on the pitch axis location I had on the various aerodynamic profiles I used to draw the blade. I understand that it allowed me to align the various...

I am talking about low wing single engine WWII fighter types. In particular, I am interested in accelerated propeller airflow through the transition/curvature of the prop slipstream spiral distribution around the wing, from being partly below, towards mainly above the wing. This as the wing's...

Hi, Yaw, pitch and roll are used to describe the movement of planes or ships. Azimuth and elevation are used to describe the pointing direction of a dish antenna. Can they be used exchangeably? I think two angles are enough for planes and ships, why 3? Owen

Homework Statement [/B] When a stream of air is directed over the end of a 40 cm long piece of plastic pipe, open at both ends, a sound is produced. (a) Explain why this occurs (b) If the bottom end of the pipe is covered, what will happen to the pitch of the sound? Explain Homework Equations...

It is 9:45 am in my city in British Columbia, and it is pitch black. All the streetlights are on!

Hello everybody. I am involved in a project aiming to address Physics Misconceptions regarding Sound through the creation of virtual musical instruments. One of the major student misconceptions I have found in bibliography is the fact that students perceive sound pitch and loudness as being the...

I think this question boils down to whether the parts of the inner ear grow from say age 6 to age 26. My thought is that if the parts of the inner inner ear do grow a little, then their response to what was a shorter wavelength of sound in the past will be the same as to what is a longer...

Hi. If I know the pitch and amplitude of a sound wave, will I be able to calculate its volume. I can understand volume of devices vary betwerb brands and other categories. For the sake of discussion, let's assume volume to be a consistent unit or if db is the right unit, let's take that.

Yes, this is kind of a weird question to make, but I haven't found anyone discussing it so I decided to ask it myself. The question: Is it possible to change the pitch of a voice up two tones (for example), in order to create a harmonizer that has no electronics involved? The idea and where it...

I am a musician trying to develop some physical modelling synthesizers (synthesizers modelling natural instruments). In particular, drums and guitar. It is my impression from playing drums and guitar that when you strike a drum head or guitar string very aggressively, there is a natural "pitch...

I made a mistake on a PCB I designed, and have a set of through holes that are spaced 0.150" apart, when the component I want to put into it has a pin-pin spacing of 0.1". Does anyone know of a simple adapter that could go between these two sizes? I'm looking to avoid the time consuming task of...

I was reading Walter Isaacson's biography of Einstein recently, and I thought of moving walkways in airports. Let's say we have a pitcher and a catcher on the moving walkway 80 feet apart, and the pitcher throws the ball to the catcher, and the time that it takes to travel from the pitcher to...

Hi everyone, this is a real world problem following the sinking of a narrowboat in 2014. The boat caught on the side of the lock as the water level dropped, and the resultant combination of pitch and heel resulted in the boat taking on water at the stern and sinking - luckily with no loss of...

The other day I was at a river listening to some rapids. The sound produced by the rapids appeared to vary in pitch depending on how high up I was (squatting down to the ground and standing up produced about a fifth in the variation of the pitch); and I can't think why it should be? Many Thanks

Homework Statement Homework Equations p=nsf δ=mϒ Kd=[sin(δ/2)]/msin(γ/2) Kp=cosε/2 e.m.f=4.44TφfKdKp The Attempt at a Solution i do not know why pole pair =2 and it is short 2 pitch. how can i find pole pair and short pitch from its original developed diagram? i know that Phase spread=60(we...

Homework Statement I have three angles that relate the sensory body frame to the Earth centered Earth fixed frame: roll_ecef, pitch_ecef, yaw_ecef I have the longitude and latitude. Find the roll, pitch and yaw angles that relate the sensor body frame to the local North East Down frame...

Hello, I am not an expert in aerospace engineering, merely a hobbyist so bear with my ignorance. lately I have been thinking of creating my own propeller and variable pitch system using a CNC machine as a longer term goal. This desire arose due to the fact that there are no commercially...

I believe what I am attempting to do is not possible but here goes. I want to design a fixed overall length coil which I can manually adjust the pitch on. Optimally one would be able to grab the coil and by twisting it in place would be able to change it's pitch by changing its diameter but not...

My brothers and I want to calculate our pitch speed. We have a simplified formula: M = (D/T) x (3,600/5,280). This will obviously have a large margin of error, but we'll try our best to accommodate. I need to know how to calculate air resistance into the equation. Thanks!

Hi everyone! Just joined the fórum after a lot of hours searching the web and Reading some books...I have one question, didn't found na answer to it...but let's give it a try ;) How can you determine the optimal circular pitch and in consequence the optimal diametral pitch of a gear (increasing...

So I've been researching into this a lot lately as I want to learn just exactly what pitch is coming from my speakers but I'm getting confused. If pitch changes with temperature/speed of sound and 1hz is always the speed of sound. Then when using a midi instrument or electronical instrument...

I'm reading about propellers and trying to get some of the basics, and some things are confusing to me. Namely, a quadcopter has a 12x6 prop, with a 6-pitch. That means in every rotation it should move 6 inches forward(up), but it doesn't do that at all since it's in hover mode. Wouldn't that...

Hi all. I am not quite sure if this is the right forum to place this question but for me there are several forums that would fit with my situation :D I am making a game where I have to throw/shoot a projectile through a 3 dimensional space which has to land on a specific object. There are...

Homework Statement Homework Equations v=fΛ v=√(T/μ) The Attempt at a Solution I know I'm supposed to make an attempt, but I can make heads nor tails of this. Are they changed in a constant ratioo? Does the tension come into play? The answer given is 0.16m

hi guys, can someone please tell me how to find Theta and Phi from Yaw Pitch and Roll? I use my smartphone orientation sensor on a project and i need to calculate the smartphone's normal vector projection.

difference between pitch and volume?if a sound is high pitched ,doesn't it mean that sound is loud?I don't think so because loudness is related with amplitude and pitch has to do with frequency,right?BUT please someone explain how can we say whether a sound is high pitched or loud just by...

Hello, I've come across this toy called a "Switch Pitch" designed by Chuck Hoberman. It's a ball that when tossed into the air (with some amount of rotation), inverts and changes colour. Made of plastic, it's connected with numerous sockets and plates. It's quite hard to describe with words...

Homework Statement As part of a school project, I'm investigating the optimum blade pitch angle for a simple 6-blade wind turbine, powered by the air flow from a desk fan. I have taken power output measurements using angles in 5° intervals from 0° to 30° and found the optimum to be 20° in 5...

so I have a white, brown, and pink noise generators and i want to shift the pitch up by one octave (12 semitones) from middle C, I need to sample 2 time as fast as I play the sounds correct ? so in the c# code for my white noise generator I have it playing at 44100 Hz( the standard) but I...

I want to project a circuit that lower the pitch of a sound input by half and plays it closer to real time as possible. I thought about converting the input to digital and then to analogical, with a slower clock. But I wonder if i could do it using only analogical electronics.

Homework Statement The uniform 45.6 mT magnetic field in the picture below points in the positive z-direction. An electron enters the region of magnetic field with a speed of 5.29E+6 m/s and at an angle of θ = 30.1° above the xy-plane. Find the radius r and the pitch p of the electron's spiral...

Homework Statement This is not homework, I'd like to know if it is possible to find the pitch a log spiral knowing that at every round (2π) r grows by 535.5 times. For the little I know the equation should be just r = e2π = 535.5 Supposing it starts at r=1cm and goes clockwise, I have...

It is basically a question in computer graphics but I guess math sub-forum will suit this question. While rotating a point, why we first apply yaw, then pitch and then roll in that order? Of course if we change the order, final rotation changes but why this specific order works? Some proof or...

Hi I need to calculate the velocity of an airplane after it executes quarter loop (starts horizontally, pitches up and ends vertically). Because I also need to know the velocity at several intermittent points I wrote an incremental equation (below). But this is only correct (if it is correct...

Hi guys! I have assignments and we are trying to get to reasonable value for more than 2 days and still nothing... Okay.. problem is: https://imagizer.imageshack.us/v2/705x238q90/191/6qqd.png picture of the plate: https://imagizer.imageshack.us/v2/412x395q90/835/7u81.png F =...

Hello, I'm sorry if this is a dumb question but I am extremely confused and could use some guidance. So consider a cartesian coordinate system with a plane which passes through the origin, and there are vectors of known X,Y,Z components which lie within this plane. The plane(and vectors) are...

Stumbled upon these recently. http://www.dailymail.co.uk/news/article-2095309/Someones-eating-carrots-Chinas-cat-eye-boy-dark.html http://www.whydontyoutrythis.com/2013/08/chinese-boy-with-ability-to-see-in-pitch-black-stuns-medics.html I so always wanted the ability to see in the dark! I...

All, Turning to the experts with a boat problem I'm trying to solve. Specifically, I'm in the process of changing the gear reduction of the transmission on my boat and will need to get a new set of propellers with a different pitch. The old set up worked just ok... I tested different...

It happened! FINALLY the moment we have all been waiting for! http://www.nature.com/news/world-s-slowest-moving-drop-caught-on-camera-at-last-1.13418 OK so it wasn't the famous pitch drip experiment, but still.

Hello All, I have measured acceleration data from the sprung mass of vehicle, traveling at (almost) constant speed. There are sufficient accelerometers, to allow the sprung mass angular acceleration, in pitch, to be extracted. I have detailed profile data describing the excitation surface...