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150 to around 120, which bpm is best for pitch?

I have a song at 150 bpm, perfectly in tune. I want to repitch it down to around 120 by slowing it down. At which bpms will the notes be at pitch?
posted by semaphore on May 23, 2013 - 6 answers

 

How do I go from one kind of nerd to another?

What steps should I take to switch to the aerospace industry from the academic world? [more inside]
posted by vernondalhart on May 21, 2013 - 9 answers

Where can I buy architectural engineering models?

Are there any online stores that sell teaching aids for demonstrating principles of architectural engineering? I am wanting to buy model columns, arches, domes, trusses, cantilevers, and so forth, to use in architectural history classes that I am teaching. The goal is to demonstrate the physical forces that act on buildings, so I don't need models of finished buildings and bridges, but rather models that show how the structures work--preferably in an interactive way. Any leads would be most appreciated.
posted by mortaddams on May 19, 2013 - 3 answers

Skateboard physics

I'm watching the X Games on ESPN, and it's the skateboard competition in a swimming pool-like skateboard park. After the initial drop-in to start a run, the competitors do not put a foot down and kick off, yet they seem to sometimes gain speed during the run, depending on their actions. What's going on here, from a physics perspective? How are they adding energy to speed up? [more inside]
posted by Cool Papa Bell on May 16, 2013 - 5 answers

Swing set loading.

Actual question: what is the formula for the deflection of an intermediately loaded simply supported beam from multiple point loads? Reason for the question so you can question my assumptions (and know that I'm not doing homework): I am building a swing-set, from pretty much standard swing set parts, but want to deviate from the standard dimensions a bit - in particular, I want to make the top beam in a single bay setup 1.75' longer than the usual 10'. I am doing this so I can hang a longer bench swing that would hold a couple of people, so this is more length supporting more load, and I want to calculate some things. More inside! [more inside]
posted by flaterik on May 16, 2013 - 18 answers

How to pronounce an equation in English.

Please help me pronounce this formula related to projectile motion as it would be spoken out loud: L = v0^2 sin2θ / g [more inside]
posted by misozaki on Apr 30, 2013 - 15 answers

How can I relearn high school subjects?

I want to relearn algebra, chemistry, basic mechanics, and basic physics this summer. For free? [more inside]
posted by Grandysaur on Apr 25, 2013 - 12 answers

Can CCTV predict earthquakes?

In this CCTV traffic video of the recent earthquake in China (preceded by a 30s ad), an interference pattern rolls across the screen just before the shaking occurs. Is this an artifact of the recording (or transfer between media), or something "real"?
posted by pjenks on Apr 22, 2013 - 7 answers

♫♫ What do you do with a BS in Physics? ♫♫

Three years ago, I graduated with a Physics degree. Since then, I've been working in a soul-crushing IT job. Realistically, what are my options to push my career forward? Help me find my passion. Lots of snowflake details inside. [more inside]
posted by anonymous on Mar 25, 2013 - 11 answers

Please approximate temperature range for bodily destruction by heat/cold

What are the fatal ambient temperatures, cold & hot, for the human body? (total destruction, not just death) [more inside]
posted by herbplarfegan on Mar 19, 2013 - 20 answers

Recommended reading on religion and natural laws?

I am a scientifically-minded person who is trying to sort out my religious beliefs. I think it would be helpful to read some debates between deism, atheism, pantheism (Spinozism), and/or a scientifically-grounded theism. Can anyone recommend me books or essays that discuss these topics in ways that are engaging, well-thought-out, and thorough? [more inside]
posted by capricorn on Mar 19, 2013 - 16 answers

Math/Physics Question: Stability of an abruptly stopped object

If you have an object with a given base length and a given CG height, how fast can it travel before you have to worry about it running over an obstacle and falling over? [more inside]
posted by Popular Ethics on Mar 5, 2013 - 16 answers

Lifting a Washing Machine onto Pedestal

My dad built a proper pedestal for our new washing machine and dryer. It is 19 inches high. The challenge is getting the washer up onto the pedestal. The washer weighs 232 lbs. It is just the two of us today. I don't want to throw my back out. Neither does he. What equipment or physics tricks can we employ to get this thing up on the pedestal?
posted by jasondigitized on Feb 17, 2013 - 16 answers

Could we hear the speaking voice of a six-inch-tall human?

I am considering writing a novel/story that involves the idea of people living among us who are somewhere between three and eight inches tall, but I don't know enough about the physics of sound to know if normal height humans would be able to speak to these tiny people. Would their voices be too high-pitched to hear at all, or just very difficult to understand? Would our voices be understandable to them? [more inside]
posted by Rock Steady on Feb 15, 2013 - 18 answers

How do I learn to be an effective tutor?

If I know the material that I'm teaching well, but don't have any experience with tutoring or teaching, how do I learn the skills and techniques that will help me be an effective tutor? [more inside]
posted by cognitio on Feb 3, 2013 - 8 answers

baby's first slr

Giving my sister my old dslr for her 18th birthday. I'd like to also give her a book that explains the principles of photography. I'd like it to be clear and easy to understand in regards to aperture, depth of field, dynamic range etc. , but I'd also like it to have some ray optics to get her to think about why the camera works the way it does (focal depth, optics etc). Any suggestion would be great.
posted by Large Marge on Dec 16, 2012 - 11 answers

What. The hell. Did I do.

Driving home this afternoon, I spun my car 360 degrees. I have no idea what happened. Please help me figure out what it was so that it never, ever, dear god ever happens again. [more inside]
posted by AthenaPolias on Dec 15, 2012 - 24 answers

falling asleep at light speed

Despite being in a technical field, I feel like I don't understand physics beyond 1915. Are there any excellent books, websites, anything that has helped you actually grasp physics from the last 100 years?
posted by four panels on Dec 3, 2012 - 9 answers

FISH IN SPAAAAAACE!

Work in my office has ground to a halt over this question about the physics of fish in space. [more inside]
posted by stuck on an island on Nov 20, 2012 - 28 answers

How large a hadron would a large hadron collider collide, if a large hadron collider could collide hadrons?

Does the Large Hadron Collider collide large hadrons, or is it a large machine that collides regular hadrons? [more inside]
posted by gkhan on Nov 8, 2012 - 12 answers

Home Physics Filter: Does squeezing the bottle of a carbonated beverage help keep it from going flat?

Does squeezing the bottle of a carbonated beverage help keep it from going flat? [more inside]
posted by dammitjim on Nov 3, 2012 - 12 answers

Direct line to Stephen Hawking

Where can I find someone willing to help me do relatively simple (ha!) relativistic time dilation calculations? [more inside]
posted by brenton on Nov 2, 2012 - 14 answers

And wash away the rain?

What is the minimum mass that would be requisite to form a black hole? [more inside]
posted by shakespeherian on Nov 2, 2012 - 9 answers

in search of lost time book

What was this book I read? Published in last 10 years, it had something like an explanation in layman's terms of the physics of time & why time is perceived by our consciousness as a flow. Can't recall much more than that I'm afraid.
posted by canoehead on Oct 29, 2012 - 9 answers

Technical writing for a physicist?

I might be hired as a technical writer soon. I'm not sure this would be the right job for me. I need some advice. [more inside]
posted by Fillus on Oct 24, 2012 - 9 answers

How fat DOES a man have to be to stop a runaway trolley?

How fat DOES a man have to be to stop a runaway trolley? Check my math/physics please. [more inside]
posted by RobotHero on Oct 4, 2012 - 10 answers

How much would a person weigh who would be unable to jump?

How much would a human have to weigh to be unable to jump (lift both feet off the floor at once at least a couple of inches)? [more inside]
posted by crabintheocean on Oct 3, 2012 - 12 answers

What is the best way to preheat a stainless steel pan enough that the food won't stick, but not so much that it warps?

What is the best way to preheat a stainless steel pan enough that the food won't stick, but not so much that it warps? [more inside]
posted by Jim Biancolo on Sep 28, 2012 - 12 answers

How can I calculate the diameter and strength of a helicopter's downdraft?

How low can a helicopter fly before people on the ground are affected by its downdraft? Is there a standard way of calculating downdraft strength and diameter at various heights? [more inside]
posted by embrangled on Sep 23, 2012 - 7 answers

Why should "e" exist?

Why is the number "e" so... [more inside]
posted by nondescript on Sep 9, 2012 - 17 answers

Please assist my mental pull up

My gym has an assisted pull up machine that provides varying degrees of assistance depending on how much weight is selected. I'm pretty sure it's lying. [more inside]
posted by Gee Your Hair Smells Terrific on Aug 23, 2012 - 9 answers

Spaghetti Surprise!

I added some red wine to a hot pan containing some carmelized onions and garlic and spices and just-added cold ground turkey. FWOOM the wine ignited as if it were brandy in souvlaki. Wha? [more inside]
posted by mwhybark on Aug 19, 2012 - 12 answers

Nature's egg timer?

What readily available materials change state at a constant, predictable rate in an easily observable manner? [more inside]
posted by londonmark on Aug 15, 2012 - 12 answers

Wasting way too much time watching physics videos...

I need time to go through this, but I'm wondering to the scientists if they have ever pointed an electron microscope at the center of a particle collision at the LHC? Do they see at that level of detail?
posted by sfts2 on Jul 19, 2012 - 13 answers

What is causing the level of fluid in my hummingbird feeder to go up and down?

The amount of hummingbird food in my feeder is going up and down on its own. What's going on? Is it possible that it's acting as a thermometer or a barometer? [more inside]
posted by waldo on Jul 18, 2012 - 30 answers

Physical Mathematics?

Is there a book that teaches math via physics? [more inside]
posted by adamdschneider on Jun 20, 2012 - 7 answers

How to petition a college course prerequisite?

My community college requires a basic, high school level Physics course as a prerequisite to any other course in the subject. While I took such classes in high school, I have no proof of this on my transcript. My only option at this point is to appeal to the head of the department of Science and Mathematics. While I do plan on making as compelling of a case as possible, I've been told that they want to see some kind of proof that a student would succeed in such a class before granting the petition. Does anyone have any idea what kind of things they might be looking for? What might I be able to do to prove that I know the material and would be able to handle the coursework?
posted by zazzles on May 22, 2012 - 18 answers

Explaining the physics of the motion of falling objects

How would explain and draw the solution to this physics problem re: packages dropped from an airplane (projectile motion/falling objects)? [more inside]
posted by sunnychef88 on May 21, 2012 - 17 answers

Power Grid: The Game is way more fun than this.

Explain alternating current distribution across "the grid" to me in terms an educated layman can understand. Specifically, I have a question about how to talk about which power plants are providing power to a particular consumer. [more inside]
posted by 256 on May 17, 2012 - 20 answers

What's a good book for selfstudying second semester physics?

What's the best book to self study semester second of algebra based physics with? [more inside]
posted by tomtheblackbear on May 4, 2012 - 7 answers

.....wat?

I'd really love a detailed explanation of the terms and humor in this math / science related XKCD cartoon. [more inside]
posted by lazaruslong on Apr 25, 2012 - 14 answers

Where can I find detailed info on how locks work?

I'm looking for reputable articles on how locks(ie. tumbler locks, pin locks, ect) work. I have to write a 5-page paper on the physics of locks for a class but I'm having trouble finding articles other than just Wikipedia explanations. I need a few sources Wikipedia besides that because this is a college course. Any suggestions?
posted by kitsully on Apr 19, 2012 - 14 answers

What was that awesome show about the history of physics in the late 80s?

There was a great series about the history of physics on PBS in the late 80s. It featured a combination of very clear explanations of each of the fundamental equations in physics throughout history presented by a very calm, level voiced (almost reverent) narrator and accompanied by fantastic very BBS Hitchhiker's Guide style animation. What was this show? And where can I find it now? [more inside]
posted by smallerdemon on Apr 18, 2012 - 14 answers

The 'Invisible' List

Can you help me make a list of the things that pass through your body constantly? (eg. radio waves, neutrinos, micro black holes)
posted by herbplarfegan on Apr 13, 2012 - 9 answers

Same as it ever was?

Is the speed of light constant on the timescale of the universe? [more inside]
posted by Orange Pamplemousse on Mar 14, 2012 - 12 answers

The part is greater than the sum of the whole?

Scientists recently announced more evidence of the existence of the Higgs Boson, at a mass of around 125GeV. This indicates a mass significantly larger than that of a proton. If this is the particle that gives all other particles the property of mass, how is it possible for an single unit to have more mass than the particles it confers mass on? [more inside]
posted by fearnothing on Mar 10, 2012 - 9 answers

Best way to maximize sound system setup?

Physics/Sound Engineering/Speaker Setup Question. More = lower volume? [more inside]
posted by conifer on Mar 10, 2012 - 13 answers

Help me help some kids approximate the work done to move air through a tube

I need to approximate, very simply and avoiding any mention of fluid dynamics because this is for schoolkids aged 14-16, the forces acting on a volume of air that is being pulled through a tube by a fan. My physics is failing me. Help! [more inside]
posted by dowcrag on Mar 9, 2012 - 6 answers

Filter that makes laser beam visible?

Are there types of laser light, color or wavelength, whole beam can be seen in daylight conditions with a special eyeglass filter? [more inside]
posted by pallen123 on Mar 6, 2012 - 11 answers

What would happen if you crushed a car to the size of a baseball?

Superhero Physics: If you telekinetically/magically crushed an automobile to the size of a baseball, what would happen exactly? [more inside]
posted by Cool Papa Bell on Mar 1, 2012 - 14 answers

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