Physics Question?

Hi Everyone,   I know that this is not a project related question and I promise not to make it a habit, but my physics teacher stumped our class with a question today and I thought of all the smart people on Instructables one of you would know the answer. I have already search google to no avial. Is it possible to determine the volume of a flask given only the starting temperature/pressure and the final temperature/pressure? The number of moles are unknown. If it is possible how do you determine it? Thanks for your help!

Question by Hammock Boy 6 years ago  |  last reply 6 years ago

Quantum physics

Wow I was looking for some info on quantum physics and stumbled on this *cough* nut job *cough* and check this out *cough*Scam! *cough*

Topic by iman 10 years ago  |  last reply 10 years ago

A proposed projects for physics...

Hello there techies, the project USB charger was proposed by me to our professor in physics II. unfortunately he didn't accept such project HOWEVER he was happy. He just said that our project is not yet satisfying. He wants us to do a power inverter. We will buy a 2 6-volts battery and series it and it will output a 200+volts with a 30watts and then we will insert any charger such as a nokia cell phone charger and then voila, it should be charging. Do you think it is possible to do? And another project I proposed is that we will make a REAL TIME CLOCK using a 7 segment. I already had a schematic from youtube. and it uses a decade counter ICs but unfortunately I think such ICs are not available in our country, can you help us sir? T____T 

Topic by glennvontot 8 years ago  |  last reply 8 years ago

Racing Game Physics

I've been designing a physics engine for a racing game for a long time now (months? years?) and I think that I've finally got almost everything figured out. The one thing that I don't know about is traction. So far my best guess for a formula is T = X + (Y * S)Where T is the stabilizing force on the car, S is the amount of slippage, and X and Y are two of the car's stats (probably measured in G's). This formula would be applied to each tire separately to account for the suspension.NOTE: The thing that might not be obvious here is that the car doesn't slip at all as long as X isn't exceeded.What do you think of this?

Topic by yourcat 10 years ago  |  last reply 10 years ago

Is this derivation RIGHT(physics)? Answered

Hi to whoever is reading this.Yesterday me and my friend derived an expression relating mass of a photon and its frequency .Can anyone tell me if its right?Ps I'm only 15 years old so i may not be right . Here is the link for it: the folder name isPMF.docx and anyone can view it also thank you in advance.

Question by Strontium 5 years ago  |  last reply 5 years ago

physical ip protector?

Would it be possible to build a physical hub, for protecting your ip, like some sort of adapter, u first plug in you internet cable to it, then you plug the adapter into your computer?

Question by huyu 8 years ago  |  last reply 8 years ago

Physical Spectrum Analyser

Hi! I'm planning to build a physical Spectrum Analyser - a tangible model capable of showing audio levels (or something like that). A moving, undulating board of pillars that rise and fall with music. Spectrum Analysers split audio inputs into 'Bands' and normally then express these values with light boards (LED's). I want to use an audio input to create kinetic power. Is this possible? I'm thinking a series/grid of actuators might serve to raise/lower blocks and columns. This is all new to me! Much appreciated. Any thoughts?

Topic by Jaminajar 3 years ago  |  last reply 3 years ago

LED physical durability

Heya, So, I'm thinking of making a flashing rattle, by using LEDs and batteries as the "stones" in the rattle. My thought is that when an LED randomly connects with a battery correctly, it will flash. But, will this destroy the LEDs very quickly? Shaking a light bulb is bad, but I think that LEDS are a bit more durable than that. Don't know HOW durable though. Any other thoughts that would help me?

Topic by AidanG 4 years ago  |  last reply 4 years ago

Physics puzzle games- Auditorium, World of Goo and Crayon Physics

I really like puzzle games. I've played two that are really addictive and beautifully made, and found another that looks great.AuditoriumAuditorium has a free on line demo. I've played through the levels a few times. The full game hasn't been published yet.The screen has a stream of light particles flowing into it. You have one, or more, buttons that will affect the path of the particles: like one that bends the light stream to the right, or one that pulls it into a vortex. You move the buttons around to steer the stream into boxes that are scattered around the screen. There are many particles in the stream, and by careful placement of the buttons, you can split them into different paths. When you hit the boxes with light particles a new group of instruments join a symphony you hear. The goal is to get all of the instruments playing.Some levels have areas that will change the color of the light particles as they pass. Some of the music boxes are different colors, and you will have to route the light particles through the color changer before you send them it into the box. Try it out, the free online demo will make it very clear. I didn't even look at the directions. It's easy to find your way as you go. I love a game like that.PlayAuditorium.comWorld of GooIn World of Goo, you have to stick living gooey balls together to make lattice and build some kind of structure (tower, bridge, rope, ...) that allows the gooey balls to reach the end of a pipe that sucks them up. The Gooey structures are not stiff. If you don't build your structure carefully it will bend and can collapse under its own weight. It is a 2D game with a comic book style to the graphics. There is also a level designer and an online community where you can share new levels. I haven't experimented with these yet - I'm still working through the levels that came with the game.There is a downloadable demo for both PC and Mac. There is also a WII version for sale.It is drawn and designed beautifully. Totally addictive.2dboy.comCrayon PhysicsI haven't played this yet but it looks really great.The graphics look like they were drawn by a 5 year old with a box of crayons. When you get to a level, it presents a drawn scene with a star and a ball (it's actually an apple. Must be a tribute to Newton) somewhere in it. You have to draw some kind of mechanism, or ramp, or some objects, or... As you are drawing, the objects develop mass.Everything you draw then reacts with gravity. You have to harness the momentum you get from everything dropping to the ground in order to push, throw, drop or guide the ball so it hits the star.Look at the video it is self explanatory.

Topic by SFHandyman 10 years ago  |  last reply 10 years ago

Physics, the good, the bad, and the ugly ?

I have been going through a site that has a lot of good things in it, but I am unable to confirm all of it. Has anyone ever read through this   Science/Physics miconceptions  site? 

Topic by Goodhart 7 years ago  |  last reply 7 years ago

Adding I'bles to the Physics Group

Plasmana and I have been going through the Instructables archives and adding appropriate I'bles to the Physics Group. If you have or find ones you think are appropriately, please help us out.

Topic by kelseymh 10 years ago  |  last reply 10 years ago

Physics concepts flash animations

I stumbled on this site with all kinds of cool physics animations a few minutes ago. It has all sorts of animations illustrating physics concepts, from wave behavior to vectors to fluid mechanics to magnetism. It looks pretty cool. Some of the animations are more like just articles, and some are true animations. Requires flash to run.

Topic by Lithium Rain 10 years ago  |  last reply 10 years ago

My Blender physics simulations!

Just for fun, I created a few physics simulations in blender, All of them of a building getting knocked down with various objects(meteor, plane, car, spheres). Here it is Here is my first one, It is older And included is a screenshot of the second simulation! :D Tell me what you think :) Thanks ~ReCreate

Topic by ReCreate 9 years ago  |  last reply 9 years ago

Optics question; physics homework... Answered

Hi guys, There is a new physics teacher at school and he asked us this question: an object fell into a very dark hole in the ground and you don't have a flashlight, but the sun is 30 degrees above the horizon. Using a mirror you have to reflect light from the sun into the hole. In one case the hole is one meter deep and in the second case it's three meters deep. The question is: what angle should the mirror be placed in relation to the sun (or horizon) to illuminate the hole? I don't really remember how to calculate this so if you can help me that would be great. Thanks!

Question by Eunix 3 years ago  |  last reply 3 years ago

3D Domino Physics Simulation!

Just for fun, I made this little video. And these What do you think?Anyways, I made that using a Physics simulation DLL for Gamemaker.Rendered and everything on my Computer, I got Framerates a bit lower than 1(what do you expect with over 1000 Dominoes?), But the recorded video output is much faster than that.Enjoy!

Topic by ReCreate 9 years ago  |  last reply 9 years ago

Computer program learns physics

From Wired:"In just over a day, a powerful computer program accomplished a feat that took physicists centuries to complete: extrapolating the laws of motion from a pendulum's swings.Developed by Cornell researchers, the program deduced the natural laws without a shred of knowledge about physics or geometry. ...Condensing rules from raw data has long been considered the province of human intuition, not machine intelligence. It could foreshadow an age in which scientists and programs work as equals to decipher datasets too complex for human analysis."LinkThe software has a long way to come, but apparently it's showing a lot of promise.What do you guys think? If computers can do physics better than humans, does that make human physicists obsolete?

Topic by drinkmorecoffee 10 years ago  |  last reply 8 years ago

Physics Competition Car Design

Hey Everybody, I'm new to the community here, and i am hoping that with so many great minds on this site, some great ideas will be generated. the deal is, for a competition, my school needs to build a small car, around 1foot by 1foot, and it is propelled by three average sized rubber bands, it need to travel three meters straight, make a 90 degree right turn on the spot and travel 2 meters to stop in a parking zone, it has to turn and do the whole course unaided, Any great ideas? Thanks for helping me out

Topic by techball 11 years ago  |  last reply 11 years ago

Musical Junk Physics Project

This project is not for me. It is for someone who inquired on Answers. Here was his original text:It's a project for physics, and it sounds impossible. I also have to play it in front of the class and have a written component with an explanation on what resonance is occurring. No electric instruments.Objectives:1. Construct a musical instrument out of junk and common materials such as plastic pipe, wood, glass, metal scrap, etc.2. Demonstrate and explain physics concepts inherent in your instrument.Rules: 1. The instrument must be able to play an octave in tune to receive a B grade.The A grade is reserved for truly amazing instruments in terms of thought and construction, so my challenge to you is to WOW me.2. The instrument must be able to play a song. Songs such as "Mary had a Little Lamb" or "Twinkle Twinkle Little Star" are not adequate since they do not include all the notes in an octave. 3. No Kazoos, Jew's Harps, Pop bottles filled with water, musical saws, washtub basses etc. When in doubt, ask.4. This is a high school level assignment, so I am expecting high school level (or above) projects at an appropriate level of difficulty. 5. Grading will be based on # of notes playedability to make your instrument resonateappropriate difficulty of the instrument constructionyour song of choice in an auditory presentation to the class and an explanation of the physics behind your instrumentcreativity of course.Stringed instruments must have more than one stringLet's help him out!!!

Topic by BeanGolem 10 years ago  |  last reply 8 years ago

Camera Stabilizer (Physics related)

I had an idea for a camera stabilizer a while ago which involves some basic rules of physics. I've done some thinking on it and I can't seem to figure out if it would really work or not. It involves two principles: 1.) Torque (t=f*d) 2.) Inertia (p=m*v) ---- The idea is to combine a gimbal design found on camera "gliders" like these: -Commercial product: -Homemade design: ...with some sort of see-saw to counter the effects of up-and-down motion.  Ignoring the fact that this might be somewhat hard to hold such a thing, I just want to know if this would work. ---- Any balanced see-saw will have an equal amount of torque on either side of the pivot point. Therefore, a balanced see-saw will work with 500g hung 10cm from either side of the pivot point, OR 750g 5cm from one side and 250g 15cm from the other side (750*5=3750; 250*15=3750).  With this concept, I thought of designing this part of the stabilizer like a small camera jib ( That is, the camera on one end with a counterweight on the other. The pivot point would have a handle or some kind of vehicle mount on it.  The stabilization occurs (or so I'm thinking) because of inertia. Inertia=mass*velocity. So, when the pivot point (the handle) moves up or down, one of the sides of the see saw should move up faster than the other. The side that moves up slower (the longer side of the see saw, I'm thinking) should have the camera mounted to it.  ---- Is there a flaw somewhere in my thinking? THE QUESTION: Would both sides of an uneven length, balanced see-saw move up at the same time when the pivot point is moved up or down? I'm not really sure and I'd like to hear your input. 

Topic by John Smith 6 years ago  |  last reply 6 years ago

Instructables HQ physical adress?

What's the Instructables HQ physical address? Now that Google is offering directions by walking, I can find out how long it would take me to trek halfway across the country...

Topic by KentsOkay 10 years ago  |  last reply 9 years ago

Physics equation for air displacement? Answered

I want to make a fan powered go-kart, is there a formula I can use to calculate the minimum amount of air displacement to make it move?

Question by A-Nony-Mus 9 years ago  |  last reply 9 years ago

Survey on Physical Computing and Microcontroller

Dear user, I need YOUR help in order to get some insight into the substance of microcontrollers and physical computing. The basic question that needs to be answered is, what the problems are that occur in the process of physical prototyping, what the reasons for these problems are, and how these problems can be avoided. The results will be used in a bachelor thesis, that deals with this topic, trying to find out how easy - or difficult - it is to enter that particular field. I kindly ask you to follow the following link and to participate at this survey. Thank you very much in advance! Vletsou Ioanna LMU - University of Munich  

Topic by asking-student 7 years ago  |  last reply 7 years ago

Flight Physics of a Golden Snitch?

Does anyone know if it's possible to build a miniature battery operated ornithopter with a spherical body?  I'm interested in attempting to make one and would greatly appreciate any information.

Topic by SHIFT! 7 years ago  |  last reply 6 years ago

Physical Representation of Sound by katrusso? Answered

having trouble with the grasshopper script in this instructable same problems as the feedback form akshatm 1. Line 37: Function 'ParseLine' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used. any suggestions on solving this issue?

Question by NickP9 3 years ago  |  last reply 3 years ago

Water wheel for Physics Class?

I have to make a water wheel that lights up a 6volt bulb and it must have a switch so that when the water is pouring and the light turns on i can turn it of while it spins if i want. I don't know what materials i need or how to use them...HELP! 

Question by aponce4 7 years ago  |  last reply 7 years ago

Physical Space Installation Game

Looking for people who are interested in helping out on the electrical engineering side and/or set design of a installation game. Various people in the industry (theme parks and video games) should stop by during the exhibition and credit will be provided. On the electrical side it would be helping out with networking of Arduino boards to run each "gag" and be linked into a show control. On the set design side - help with the set design of the piece, lighting, and construction. The installation will take 3 players and have them "break into" a vault with various high tech security (lasers, pressure sensors, computers needing to be hacked, etc). Other examples of this type of work would be "The Tomb" and "Operation Spy" by 5wits, La Fuga by Negone (in Spain), interactive haunted houses, and theme park attractions. Message me if you have any questions. Thanks!

Topic by Skeckulous 11 years ago  |  last reply 11 years ago

Is thr any difference between a degree in astrophysics and a degree in physics ?

If yes then i would like to know which 1 of these would provide me with a better job opportunity.Also i want to know what kind of jobs will i be offered ? And will they help me to become a scientist in future ? If no thn what study should i master in order to accomplish my aim ?

Question by Gopal Dey 6 years ago

Can anyone Identify this...thing?

This came as part of a physics lab.  Can anyone identify this thing and where I might purchase a duplicate should I need one? Description: It's approximately 1 1/4 inches long and has two holes running through the center. It's made out of rubber.

Topic by Spaceman Spiff 8 years ago  |  last reply 8 years ago

What is the strength of the other charge?

I need help with solving this problem in physics class. I know Coulombs equation F= k(q1q2)/r^2 The force between two charges is 2 newtons. The distance between the charges is 2 x 10 ^ -4 meters. If one of the charges is 3 x 10 ^ -6 C, What is the strength of the other charge?

Question by Baseball24_7 9 years ago  |  last reply 9 years ago

If 96% of the known universe comprises, Dark Matter (and Dark Energy), why can't we tap the energy

To feed an energy starved world? SOURCE :Claims by modern physicists.

Question by wingcodavid 6 years ago  |  last reply 6 years ago

Physics question has me stumped

A large crate sits on a pickup truck which has coefficients of friction mu(s) =0.6 and mu(k) =0.4 . My question is how do I calculate the impact velocity if the truck accelerates (-8.0 m/s^2) and the crate slides forward 1.5 m to impact the back of the truck? Can anyone please walk me through this problem whenever you get the chance? Thank you. 

Topic by GThreep 4 years ago

A Physics problem I can't explain properly Answered

If a stick with dm/dl =const is hanging on three nonstretchable pieces of string (l1=l2=l3 and l is the distance between them) you can't find the tensions, because the problem is unsolvable if all the strings don't stretch. It is kind of obvious, because if a string happens to be 0,00000000001 mm longer than the others the tension will be zero. But how to prove this normally?  Sorry, I almost never use English for Physics conversation, so I don't know any proper words...

Question by gruffalo child 8 years ago  |  last reply 8 years ago

I am doing a "plans" project in pre-ap high school physics and i need ideas!

This project is where I have to have someone else's plans for a project and I have to give a lesson over how physics works in the thing I make. I could make a building or bridge or radio and anything basically as long as its not outrageously simple and has physics behind it. however I would need to spend under $15 otherwise I have to submit what I am buying and how much each things costs ahead of time. if you have any great ideas and maybe could help with the physics behind it that would be grand! thank you!

Question by hefner93 9 years ago  |  last reply 9 years ago


Seen on Imgur, A marriage proposal between two physicists.....

Topic by steveastrouk 6 years ago  |  last reply 6 years ago

1 ounce pressure of gas at STP contains how many number cubic metres ?

Question by MuhammadB15 3 years ago  |  last reply 3 years ago

What a lot of science in a thin layer of gas.....

Spotted this fascinating article about "how the sky works"

Topic by steveastrouk 6 years ago  |  last reply 6 years ago

What is the use of negative voltage. if it do same as positive voltage? Answered

Some where we can see that the circuit only require negative voltage. WHY Only Negative IF positive voltage can do the same

Question by engineer.arpit 6 years ago  |  last reply 1 year ago

What say ye, Resident Physicist?

In which I ask Kelseymh his assessment of the experiment which they think may have detected neutrinos travelling faster than light. (Holy run-on sentence, Batman.) (Yes, I should have checked his orangeboard first...I'm a bad stalker. :P )

Topic by Lithium Rain 7 years ago  |  last reply 7 years ago

Where can I get a powerful 14 MHz radio wave generator, and what can contain the waves? Answered

I need a somewhat powerful 14 MHZ radio wave generator. I know that these frequencies are probably illegal, so what can best contain them? I have heard that Faraday Cages can, and a parabolic reflector has also ocurred to me. What would be best to contain them, and is it possible to build one?

Question by Technicolor 7 years ago  |  last reply 5 years ago

Physics question? Why doesn't this work? Answered

So included I have the original "troll physics magnet car" that supposedly would use magnets for propulsion. I know that it doesn't work since the front magnet pulls the car and the car pulls the front magnet, so the energy is evened out. But if you put a stronger magnet on the front, then the smaller magnet on the car wouldn't have enough strength to equalize the larger magnet, so why wouldn't the car move forward?  What if you applied the same idea to a generator? (look at the picture with the circles and rectangles) Wouldn't the bar magnets continue to repel each other and make the generator wheel would spin forever? If the wheel was balanced and was given a little push to get things going, I don't see what the problem would be. I'm not planning on building this machine, so trial and error is out of the question for me.  Please help!

Question by masterbuilder 7 years ago  |  last reply 11 months ago

Physics Illustrator on NON-tablet PC

Well, I've recieved a private message from well over fifty people in the past 30 days requesting that I re-compile and distribute the Physics Illustrator, so I got off my lazy butt this morning and made it. links are updated and working.

Topic by bleachworthy 10 years ago  |  last reply 5 years ago

Physics project of worth 10 marks?????

I ve got to present this physics project by the ed of march and its of worth 10 marks but I have of idea of what to build.... :-( We are allowed to use only the things which we can find at our home( battery and wires are accepted)and the model should be working...:0 It would be a gr8 help if anyoe out there would atleast give me an idea of what to build....

Topic by blackrays 11 years ago  |  last reply 11 years ago

Physical button to launch a PC application?

So for an upcoming project I need to make a physical button that when pressed launches an application on my PC. I'm going to need to make quite a few of these, each to launch a different app. Ideally it would not be a keystroke from a keyboard, I saw tutorials on dismembering a keyboard and registering a button press to open an app, but I don't want any interferences so I'm looking to avoid that if I can. I'm going for the most cost effective design, not looking to spend much if it can be helped. Any resources or tips would be much appreciated! Thanks guys!

Question by Antilliteracy 5 years ago  |  last reply 5 years ago

Well, I am sitting in Physics

I'm supposed to be working on my rocket project with my group, but we have a substitute today (hells yeah!) She's new to the school, which is good, because we are playing volleyball with a balloon, watching movies, and listening to music. Among our fun, we played Hangman on the SmartBoard, and popped balloons. Our rocket is about done, we just need to make a power-point as documentation, and we need to launch it, which we will do on friday!Oop! the bell just rang, cya in lunch!ROGER!!

Topic by bumpus 10 years ago  |  last reply 10 years ago

Physics - Tech engineering software, that is fun?

Hi, Just a quick question... I ran across something called Gmod, or Garry's mod software today by accident. This one here...;=related It looks pretty neat, sort of a mechanical play thing. But, I'm not sure how true to reality the software is, also you apparently need to own a main platform software to use it, like Half Life. I don't have any of the games needed to play around with Gmod. I started to wonder if there is any other software out there that works as an, across the board experimenter's virtual lab? Sort of a mechanical, electronics virtual plaything? I'd think that engineering tech schools would have software such as this, (CAD comes to mind) but I didn't quite find what I was looking for with a google search... Not exactly sure what the best search term would be for something like this? I've come across virtual electronics software, but maybe I'm asking too much for a multi electro-mechanical environment. Has anyone ever used software like this, particularly something fun to play around with, without being to dry? Free would be nice as well, but I'm probably pushing the envelope there a bit! LOL.

Topic by bart245 8 years ago  |  last reply 8 years ago

is there a physics simulator that can simulate air pressure?

I want to experiment on barometers,but it is too risky and i don't have the there any physics simulator that can simulate fluid,air,air pressure,etc.

Question by utkarshsinghal 6 years ago  |  last reply 6 years ago

How does 'fire cupping' work, and what's the Physics behind it? Answered

This is another unethically homework-based question.  I have to estimate the pressure inside the cup, but I don't get how low pressure is formed.  I am not sure that you can heat the air inside so much that the thing will suck in your skin immediately without giving you bad burns. Anyway, they put a match in it for a really short time... Any ideas? The topic is Gas Laws, if it can help anyone.

Question by gruffalo child 8 years ago  |  last reply 8 years ago