Golly gee biking (cycling) is hard. Perhaps the hardest part of all is mastering high speed cornering. You see it all the time in the Tour de France; pros carving graceful arcs as they fly down mountainsides at 100kph. How do they do it? By maintaining an incredible awareness of where their center of mass is relative to their bike at all times, and adjusting it so that they can achieve the right angle of cornering.
By far the most common mistake any new cyclist will make is to turn their
Well, Michael Scott would be proud. We have finally considered all our paper and copier needs and determined that lined, microperforated notebook paper is the key.
Microperforation is the strip of tiny holes punched in notebook paper somewhere between an eighth and half an inch from the spine, selectively weakening the paper to tensile forces parallel to the spine. Essentially, it's designed to let you tear out a piece of notebook paper without ripping it or otherwise destroying it.
Now it's time,
To start a rhyme.
A rhyme of physics,
No, not metaphysics.
Newton was 'neath an apple tree,
When an apple cometh falling free.
"Ow" he shouted,
As his thoughts unclouded.
A great invisible force, must be!
Perhaps we shall call it... gravity!
Soon publishing the "Principia Mathematica,"
He gave the academic world a heart attacka.
Within this massive tome,
Newton drove just three points home.
Now numbered one, two, and three,
Newton finally set physics free.
Since his meteoric rise to fame on the back of "Born to Run" (without a doubt one of the best albums ever released), The Boss has remained a fascinating physics problem.
Let us look closely at the second track on "Born to Run," "Tenth Avenue Freeze Out." Here, Springsteen tells us that 'the big man joined the band.' One may obviously assume from his use of 'big' that he is referencing the Big Bang. Thusly, he is telling his audience that one night on Tenth Avenue, a human representation of th
There are people who say "Snow tires aren't needed!" They'll tell you "Advances in year round tires have obsoleted them!" They might even pull the "I have all wheel drive!"
These are the same people who told you heroin and AP Physics C were good life decisions.
Snow tires are absolutely vital to safe and effective driving during the winter months. All season tires typically are made of hard rubber compounds and have relatively small grooves, or fillets, in them to clear water. This is
Ahh, sleep. Slumber. God's gift to mortals.
Sleep is all about comfort. As many a mattress commercial has drilled into my head, not all mattresses are comfortable. There is a supposedly optimal point of squishiness and firmness and pillowness and sleepnumberness and weird-yoga-guy-meditating-on-a-mattress-for-no-apparent-reasonness. In short, different people like different mattresses.
The generic want for a mattress, however, is relatively universal. This is due to the way gravity acts
Physics is.. so gosh darn great
I feel like it and I... are fate.
With a Newton here, or a Pascal there,
These SI units we love and share.
Whenst look for a potential mate,
All emotions to physics, they equate.
If the air in the room feels perhaps electric,
Just know that physics isn't eclectic.
A standard mix of fun and function,
Studying physics fills one with compunction.
Alas, alack, it is time to go,
I'll need to do work, that's fo' sho'.
As Bernoulli said, just go with the
Ahhh. Nothing like that feeling of a thousand baby angels caressing your scalp.
First used more than 9,000 years ago, the pillow is a simple, soft device that works to add comfort to any situation. In bed? Use a pillow. Walking to school? Need a pillow. Fighting house fires? Pillow! Skidding around corners in the snow? Pillows for days.
Most simply, a pillow works to distribute a force over a larger area. Filled with soft materials, a pillow conforms to the shapes of the two surf
The earth is big and confusing, as is all the magma and magnetic and [insert another alliterative m-word here] magic that goes on inside it. To compensate for some of this magicky nature, the leap second was created.
To back up a moment, there are many different time-standards in use today, all of them slightly different, and each of them quite confusing. Two of the most common are the atomic-clock based UTC, and the solar based GMT standard.
As we have developed ever more accurate clock
Ahh, the keyboard. Platter of choices. Pallet of Arabic characters. Based on the QWERTY layout introduced in 1867, the keyboard is our portal to the world. But just how do they work?
First, it is important to note that this article centers on modern, computer keyboards. Check back later for the physics of a typewriter. Modern computer keyboards feature upwards of 70 keys (I just counted, mine has 84) which take a consistent and relatively small magnitude of force to depress and register
Honking the hooter. Emptying the schnozz. Launching the snot rocket. Everybody blows their nose, but how exactly does it work?
First, you create positive pressure in your lungs by tensing your diaphragm. Since initial PV/T must equal final PV/T, when a larger pressure is created it will result in an increase in the velocity of air exiting the lungs. This fast moving air is then guided up to the nose and out the nostrils.
As the air passes through your nostrils, it must pick up the sno
First, let us bow our heads and give brief thanks:
"We thank thee, creator of roads and corners. Bringer of snow and handbrakes. You alone make driving fun."
And now, lets talk about driving in the snow! Effectively, snow lowers the coefficient of static friction between the tires and the road surface. This means that for the same weight of car and contact patch with the road, The road can provide less "push" against the tires, so they're more likely to spin instead of roll.
As we learned from Professor Goho, friction due to air resistance is equal to .5c[ROW]Av^2. In bicycle racing, one's goal is to minimize this value as much as possible. Manufacturers spend millions of dollars each year lowering frontal area of their components and increasing making them more aerodynamic.
As an individual cyclist, one lowers aerodynamic drag by drafting; the practice of following as closely behind another rider as possible to catch their slipstream, essentially lowering the lo
So we were touring an unnamed university's engineering department this weekend. It was pretty cool, the vibe was positive, the people were well adjusted and friendly, and all seemed well.
Things took a turn for the dire as we stepped into the acoustics laboratory. Tragically, our tour guide uttered an utterly unforgivable sentence... "If I stood back to back with you inside this acoustically silent room and talked, you couldn't hear me because the sound-proofing is so great!"
Analog mice are markedly simple devices, essentially motion sensors that perform vector addition to calculate a change in position. At the heart of a mouse you'll find ventricles and aortas... (sorry, wrong kind of mouse). At the heart of a computer mouse a rubber ball rubs against two or more rolling bars.
This ball is designed to be rather heavy, and have a high coefficient of static friction. These two attributes combine to form a ball that rolls instead of slides (heaviness increases n
When it comes down to it, your basic mechanical pencil really is a remarkably simple device.
A plunger is used to depress the entire inner sleeve. A spring keeps the plunger under tension and draws it back after it has been pushed. The inner sleeve contains a lead holder with the end split into two 'pincers' that are held together by a collar. This collar is moved by depressing the plunger, which pushes the inner sleeve down while keeping the collar in the same place.
Perhaps the most
Let's just get this out of the way first: if it doesn't have three pedals and require both hands to drive, it's simply not a car. It's a sad, sad excuse for transportation.
A manual transmission lets the driver select which gear they would like to be in, and control how they shift. By depressing the clutch (operated by one's left foot), the engine is disconnected from the wheels. One can now use the gear shift lever to select an appropriate gear. The gear shift lever typically operates
2013. San Francisco Bay. The 34th America's Cup. Race 8.
Emirates Team New Zealand is neck and neck with Oracle Team USA, headed upwind (the slow point of sail; the 72 foot catamarans might only hit 30mph). In a typical race with typical boats, this would be a run of the mill maneuver. Do your best to stay in front of the other guys, don't lose ground, and find the perfect balance between outright speed and sailing as close as possible to the wind. However, nothing about racing the AC72
A bicycle's drivetrain includes the pedals, cranks, bottom bracket, gear rings, chain, sprockets, freewheel, and derailleur. With all of those parts working in harmony, it takes the power provided by a human pedalling at 90rpm and uses it to turn a 27.75" diameter wheel at 20mph, all with an efficiency upwards of 95%.
The drivetrain is, essentially, a system of levers and adjustable pulleys, working together to convert torques and forces. A typical crank is 175mm, measured from the center of
Welcome to our humble abode. Today, we shall perform a brief, directed discourse on the workings of the zipper.
Near the turn of the twentieth century, man kind was confronted with a conundrum: how the dickens would they close the flies on their snazzy new Goldrush-era Levis? Already the button fly was becoming associated with a rebel, skater boy type of crowd, and the people were clamoring for something new!
Luckily, someone came up with the zipper. Consisting of two rows of teeth, or "
Here, we'll be looking at "over center devices," for lack of a better term. Traditionally, this term is applied to the weird little hinged things in the arms of dentist chairs, where a pivot goes over the center of the mechanism, so applying more force doesn't affect the position, instead one must physically move the pivot.
Instead, we'll be referring to over center devices as anything which requires a large force to get over a "hump," before remaining locked in place (think about calculator
In short, friction. Specifically, its function within screw mechanisms designed to hold things in place.
For me, the most apparent example of this is on dumbbells where one has to put on weight plates and then screw a ring in place to hold the plates. If the screw were "ideal," it would have no friction, which would be great except for the fact that it would no longer be a functional fastener.
By screwing the ring tight against the weight plates, a force is applied pushing the ring "out.
Lately, it seems as if everyone and their mother has a "Lifeproof" case for their iPhone. Seriously. If my mom had an iPhone she would absolutely buy one of these.
The logic behind it seems to be that the average life is wet, rough, and crazy (enough said on that subject...) and that one should always use protection. For your phone. C'mon, people.
But how do they work? Typically, they contain a series of seals made of a relatively malleable type of rubber. When compressed and then he
Lumberjacks are big dudes. Because they are more massive than the average human, they also weigh more. This bigger weight (or, more properly, increased gravitational force) means that the must do more work to travel the same distance.
Since work is directly related to force in the direction of travel, much greater forces are required. As force the second derivative of kinetic energy and the first derivative of momentum, when one increases the rate of the others will as well.
As seen in
So I went to see Gravity this weekend. Overall, it was pretty good! Unfortunately, Sandra Bullock was truly brain dead throughout much of the film.
In one memorable scene, she's trapped inside the International Space Station, alone, and fighting a massive fire. Panicking, she grabs a fire extinguisher off the wall and aims it. Now, before we get to what happened, it is important to understand a few things. The character she is portraying is an MD Ph.D, with years upon years of education.
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