length affect velocity

Depending of length of a barrel can it change the velocity

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


Will Google "Penguin" ruin my Instructables' ranking?

I recently came across an article about Google Penguin. I also recently started sharing my Instructables' posts on Pinterest, Twitter, and Google+, and am confused. There are many spammy websites that take the info form my I'bles, repost it, and also leave a link to the I'ble (most of them). Example: https://www.google.com/search?q=Finger+Mallet+from+a+Tree+Branch&oq;=Finger+Mallet+from+a+Tree+Branch&aqs;=chrome..69i57j69i60j69i59&sourceid;=chrome&ie;=UTF-8 I really like Pinterest, and am okay with G+ and Twitter. I think most of my Instructables show as the first clickable option (rank), since most of my Instructables are ORIGINAL (until the Youtube plagiarizers find about them) things that haven't been posted before online... Will sharing on social media affect this?

Topic by Yonatan24 2 years ago  |  last reply 2 years ago


Operational Amplifier input voltage affects other input?

Hello, I have created a simple circuit where 2 10k resistors make a voltage divider. Supply voltage is 12.5V and if I measure in between the 2 resistors, I'm getting 6.3V. Great! Now I connect that 6.3V to the +input of an OpAmp. Result: the value is still 6.3V. Great! (The OpAmp is also fed with 12.5V) Now I connect the -input of the OpAmp to the supply voltage (12.5V). The voltage in between both resistors suddenly changes from 6.3V to 10.1V. NOT Great! Now I connect the -input of the OpAmp to ground (0V). The voltage in between both resistors changes from 6.3V to 2.4V. ?! The output of the OpAmp is not connected to anything. I thought that OpAmp inputs, in theory, have infinite resistance? The datasheet of this OpAmp (LT1253) sais the input resistance should be 10Mohm I also tested this same thing with the LT1497 and the results are the same. When the -input of the  OpAmp was connected to 12.5V, I measured the current going into that pin, 39mA!! (Only measured on the LT1253) What's the problem here? Are both OpAmps broken? Or is there something about the way OpAmps work, that I clearly don't understand?

Question by DELETED_Electorials 4 years ago  |  last reply 4 years ago


Do refrigerator magnets affect food?

Topic by Malvavisco 9 years ago  |  last reply 7 years ago


Autodesk Layoffs: Any affect to Instructables??

Http://investors.autodesk.com/phoenix.zhtml?c=117861&p;=irol-newsArticle&ID;=2135242    Autodesk lays off 10%, did this effect Instructables?

Topic by Doug Costlow 3 years ago  |  last reply 3 years ago


What factors affect signal strength?

I made a signal boosting rig out of cardboard and aluminum for my router for my PS3 to access it ('cause I can't move the router in my current situation). So anyways it started out boosting a 17% average signal strength to a strong 50%. But now a couple of months later, it's maxing out at 23% and it's been happening for a couple of weeks now. Also, my ps3 absolutely refuses to work with anything below 25%. So what changed? I haven't moved the rig since I set it up and none of the furniture has moved either. The only factor I can think of is the changing of the seasons. Anything else that could of caused this?

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


Can you do visual effects in batch programming?

I am trying to do some visual effects in batch files. I don't know how to do them. Can someone help me Please?

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


How does infrared light affect plants?

Specifically tomatoes.

Question by XOIIO 10 years ago  |  last reply 10 years ago


how to reduce current with out affecting the voltage?

I have a 12V transformer and i want to hook it up to my NST but it has a current rating of 8A but my transformer is to powerful and the lowest voltage is 12V.

Question by Jimmy Proton 8 years ago  |  last reply 2 months ago


How do the capacitors affect the tesla coil? Answered

So when I look at how capacitors are wired into a tesla coil they are outputting dc.  How does this help performance if the actual cause of electrical discharge is when a change or stop occurs in the primary magnetic feild. 

Question by jj.inc 7 years ago  |  last reply 7 years ago


Which resistors directly affect the frequency range?

I am currently working on an audio equalizer, and this is a link to the basic schematic I am using. http://www.daycounter.com/Filters/StateVariableFilters/State-Variable-Filter-Design-Equations.phtml If I am not mistaking, it would be the R1 and R2. I am also using Don Lancaster's book called the Active Filter Cookbook. I am confused on which equation I actually need to solve for the resistors using a certain frequency range. I am grateful for any help. Thank you.

Question by sound91 10 years ago


What would happen if there was no Gravity?

How would it affect Animals and Plants? How would it affect Electricity? How would it affect Space and Universe? How would it affect Chemistry?

Question by Bluejay Clouds 5 years ago  |  last reply 3 years ago


Does different amounts of yeast affect the rise of bread?

Question by sanboyd 10 years ago  |  last reply 10 years ago


Does anyone know how treads affect torque? Answered

I am referring to treads like those found on tanks etc.  If the torque on each wheel in a three wheel set is x ft/lbf how would the addition of a tread affect that torque?  Would it increase/decrease it significantly?  Or at all?  Would the thickness of the tread have a noticeable effect?

Question by finfan7 8 years ago  |  last reply 8 years ago


how does voltage affect leds and charging batteries? Answered

Assuming amps are the same how would a different voltage affect powering an led or charging a battery and im assuming there's an upper limit and if so, r u able to find it out without a data sheet (since leds pretty much never have any markings on them)?

Question by the judge 9 years ago  |  last reply 9 years ago


Radio Shack Bankrupt? How will it affect Instructables users?

Recently Radio Shack has declared bankruptcy. I know that tons of projects here on Instructables rely on Radio Shack, and some have even been sponsored by them. How is this going to affect our ability to find and buy electronic components? http://finance.yahoo.com/news/radioshack-files-ch-11-bankruptcy-222534944.html

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


How does the Bernoulli effect affect the ground effect?

I have been wondering about how ekronoplans work with consideration of the Bernoulli effect. Ekranoplans such as the Caspian Sea Monster often have there engines or propellers pointing on a downward angle, this is to push as much air under the wings as possible, in doing this they are forcing the air into a constriction being the wing and the ground, now why doesn't this cause a vacuum pulling the craft down?

Question by The MadScientist 7 years ago  |  last reply 7 years ago


How to limit DC current without affecting Voltage?

I would like to be able to choke current example 12-20amps from the 40amp peak to peak keeping voltage level to rise when the current begins to fall again as stabling after a huge load peak. This will preserve energy consumption on my circuit. Things ive researched Transformer choke Current limit thorough chips add a pwm and control (expensive and time consuming)

Question by ArturoC6 3 years ago  |  last reply 3 years ago


How do cell phone screen protectors affect touchscreen performance?

How do cell phone screen protectors affect touchscreen performance? 

Topic by Ch2112 1 year ago  |  last reply 1 year ago


how to reduse mp3 size without affect its quality

Question by 900624086281 10 years ago  |  last reply 10 years ago


How do i make asome affects with a old tape camcorder? HELP!!!!!!!!!!!!?

Need tips on makeing cheap but frigin cool affects using an old RCA tape using camcorder!

Question by Laserman595 9 years ago  |  last reply 9 years ago


would the lenght of the nichrome wire affect its ability to cut trough foam?

I need to cut a wide piece of foam and need a decent length of wire to do it like 2 feet long would that have any affect on the cutting ability of the wire

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


they use matrix to send the volt to led it can affect the other leds in the matrix led projects?

I am see the matrix led project in this project .. we use row and column .. one row can affect to another column on that display..... why it will be not affected in this project

Question by electronicsprojects2010 9 years ago  |  last reply 9 years ago


how do dust affect my performance in my computer?

How can i explain this factors which affect my computer! 1.Excessive temperature 2.Human being 3.Power outrage 4.Corrosion 5.Viruses 6.noise 7.Dust building up

Question by 9 years ago  |  last reply 9 years ago


does aluminum foil really affect a computers wifi signal? Answered

Does it, like even have an effect, and can u use it to increase the signal?

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


Are YOU affected by Pokemon seizures? ( Watch at your own risk! )

So, as many of you have known, the animated TV show Pokemon is famous for causing over 700 Japanese kids seizures via continuously flashing red and blue lights. Now, I am proposing you a challenge, can YOU endure the infamous red and blue lights? I can.http://www.youtube.com/watch?v=50VhBXseJW4I only feel a bit dizzy, but nothing close to seizures. No YouTube viewers are affected by it ( although few felt dizzy ). So, are YOU affected by Pokemon seizures? Or are Japanese kids wussies? Find out by watching the video!WARNING!WARNING!WARNING!WARNING!WARNING!WARNING!WARNING!WARNING!WARNING!WATCH AT YOUR OWN RISK, YOU WILL NOT HELD ME RESPONSIBLE IF YOU GOT SEIZURES!!!!!!!!!!!!!!!!!!!

Topic by Camisado 10 years ago  |  last reply 6 years ago


"Does rubbing alcohol affect plastic, how and what types?" Answered

I am hoping for someone to point me to research information. I am asking specifically about cleaning plastic water bottles and ice chests/coolers with rubbing alcohol. I was told that alcohol can deteriorate the plastic but I was hoping to know what types of plastic are affected by what types and concentrations of alcohol. Thanks

Question by AthleticTrainer 8 years ago  |  last reply 4 months ago


When does traffic affect ping in a PPPoe broadband connection? Answered

So i have two broadband connections, from different isps.  On one connection when i'm browsing the internet my ping goes up from 1ms to 700ms. (I've checked and rechecked a million times.) On the other one the ping always remains 1ms regardless of how many downloads are i have running.  What exactly makes this difference?

Question by N.Khan 4 years ago  |  last reply 4 years ago


Tablet battery power - affected by HDMI-VGA monitor connection? Answered

I have a 7" Windows 8.1 tablet running a music (MIDI/VST) program to provide sounds via the audio output. Input is via an OTG microUSB cable connected to a USB MIDI 'mini' keyboard (Akai LPK25 - USB powered). The audio is connected to Line In of a Yamaha Tyros keyboard and it works. I intend connecting a VGA monitor to the micro HDMI tablet port (microUSB to VGA adapter and VGA cable) and would like to know if there will be increased draw on the battery. Is there a way to supplement the power to the tablet as the charger uses the same microUSB port?

Question by gibwig 2 years ago  |  last reply 2 years ago


Does the current of a USB phone charger affect LEDs powered by it?

 Here's the story: I was reading Instructables one day, and I had a BRAINBLAST. If I were to add ambient LED lighting to my room, a USB phone charger would be a relatively convenient power source! So I got to work. However, while using online resistor calculators to determine the resistor suitable for this project, I noticed that they did not require the source current. This got me pondering. So the question is: Does the source current matter? Additional Information: 2 USB phone chargers Charger 1:     5V 1000mA Charger 2:     5V 800mA Resistor: 1.5ohm 2W Metal Film Resistor LEDs in parallel LED:     3.5V 25mA Help would be greatly appreciated!    :)

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


What is the best voltage for the IN-12 Nixie tube?

I want to make a desk clock using four IN-12 Nixie tubes. Mostly, 170V or 180V applied to the Nixie tube. I want to know which part of the tube the applied voltage is affecting.And I have found that current affects the lifetime of a Nixie tube, and I want to know if the voltage affects its lifetime.

Question by ho june 1 year ago


in a pentode vacuum tube how does voltage and current affect screen operation? Answered

I know that the 2 grid (screen) affects the current on the plate, but how does that work? does more voltage on the 2 grid make more current be on the plate ? also how does the amount of current on the screen affect all of this. Finally, is the grid current limented? Or will i have to connect a resistor?

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


How will leaving a pulley off my lathe affect its performance? Answered

 I have a variable speed motor from an old fan and I plan on using it for a small lathe. I will be turning foam and soft wood chess pieces and goblets. Will it be ok to leave a pulley system off? 

Question by imthatguy1125 9 years ago  |  last reply 9 years ago


Does the air disruption truely affect energy usage in this particular situation?

I was reading the comments in this Ible: https://www.instructables.com/id/Parasitic-Wind-Turbine/ and they said that having the turbine in the way of the airflow would create more of a load on the A/C thereby causing it to use more energy. I don't understand it in this case. I can see how putting it in line, mounted to the exhaust port, thereby blocking the exhaust would restrict the airflow. I don't see how using the already exhausted air would restrict the airflow. That, IMO, would be like saying that when you are stopped at a red light and another car is behind you, your engine is working harder because that car is behind your exhaust. Am I thinking right on this?

Question by Zippomanonfire 10 years ago  |  last reply 10 years ago


Does use of a sponsor's products affect contest judging/winner selection?

Hi, My understanding of contests (from the few that I've entered) is that how exactly judging occurs and winners are selected can vary a bit. The judging panel can be make up of Instructables staff, respected members of the community, and/or staff from the sponsor - with the ultimate decision about winners being up to either Instructables or the Sponsor (please correct me if that understanding is misguided). My question, then, is whether use of a sponsor's products in the Instructable being entered in the contest affects any stage of the judging process (selection of finalist, judges' scoring criteria, selection of winners). To give a concrete example - I have a current entry in the Microcontroller Contest, which is sponsored by Radio Shack; but my entry almost exclusively uses parts from SparkFun. It seems like this would create a conflict of interest and make it difficult for a Radio Shack employee to be an objective judge - ideally they'd want to promote their own products and not a competitor's. I tried to dig through the rules and small print for the contest but couldn't find anything definitive either way - nothing saying that this is included as a judging criteria, but also nothing saying that it isn't. Any and all straightforward answers would be appreciated - not speculating about conspiracy theories here or accusing the site of selling out - just curious how this process works!

Topic by Ben Finio 5 years ago  |  last reply 5 years ago



A Question about transformer? Answered

In transformer formula , the primary turns and secondary turns affect the voltage and current directly. Why some transformer output voltage is affect by frequency and core type , just like Flyback Transformer(LOPT) and Tesla Coil specifically is Solid State Tesla Coil?

Question by james34602 6 years ago  |  last reply 6 years ago


dose anybody have a pen gun that is affective and still looks like a pen?

We realize we are a ding breed, but we are looking for a good way to shoot small stuff out of a pen or pencil without looking suspicious beforehand.  like a spy thing or something like that, we like cheep and we can do complex.  any answers are appreciated

Question by TheMeta 8 years ago  |  last reply 7 years ago


Will cutting off the tab from a pair of vibram fivefingers classic affect the shoe?

I have a pair of vibram fiefingers, classic style, as seen here. When I wear them, I get small blisters on the achilles tendon part of my foot. Would cutting off the two rubber things that jut fro the back of the shoe affect the shoes?

Question by The Daft 9 years ago  |  last reply 9 years ago


what are the different grades of helium?

How do the different grades affect lift capacity?

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


Can pulse width modulation pins on arduino noticeably affect the strength of an electromagnet? Answered

I am currently designing a project in which two electromagnets cause a small metal object to levitate between them, and am trying to create an interactive interface in which gestures on a multi-touch trackpad cause the object to levitate higher or lower. My question is, is it possible to use an arduino's pulse width modulation to significantly alter the strength of an electromagnet in order to move an object at a noticeably varying distance from the electromagnet?

Question by ALogan97 6 years ago  |  last reply 6 years ago


Radioshack's doom - a problem for Makers?

I had missed this story until today, but it seems that Radioshack is on its last legs, with most commentators expecting it to cease trading by the end of this year. Aside from the fact that it will be sad to see such a well-known name disappear from the scene, I wonder what it will mean to the Maker community? How many folk buy their components, especially the last-minute bits needed to finish? Will the demise affect the Maker community, or does the company's image loom larger than its real influence, and the closure won't affect much after all? Will it affect you?

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


NOBODY has made any comments yet!

I went to eric's page today, and got a message that he hasn't posted any comments yet. I've seen this bug before, but seriously, now it's affecting the highest levels of instructables brass! EDIT: I've checked. It's global. Everyone is affected. =O

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


Comments not working -- we're working on it

It's affecting me too!  We're trying to get it fixed.

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


Electrolysis

What is it that affects the speed of electrolysis amperage or voltage? How much of it would I need to electrolyze 100 gallons in a reasonable amount of time?

Topic by Riley C 11 years ago  |  last reply 8 years ago


Will a magnet work in space? Answered

Will a magnet work in space, if so, will its strength be affected making it seem stronger or weaker?

Question by Kaptain Kool 8 years ago  |  last reply 7 years ago



for the ultimate budget fog chiller, would dry ice perhaps raise the affectiveness of the cooling?

Because dry ice is coolder than ice, if you sort of,..shaved it doun to about icecube size, would it cool the fog faster than the ice? and it would last longer too right?

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


Inexplicable Popularity

This is an issue that has always puzzled me, and more recently affected me. And it is entirely based on the phenomenon of an old forum topic being suddenly and randomly restored to the front of the board after an extended vacation to the back of the list. My topic, "Facebook for Nerds" has been one of the recent reincarnations to be affected and no matter how much it pleases me that someone new felt a need to comment on my original post, It begs the question of "why now" and "why this one"?  

Topic by Bigev 9 years ago  |  last reply 6 years ago


Re: iron man props - arc reactor coils?

Are the coils functional, do they affect the lights or the power supply?

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