Answer: My friend, this is a question that has plagued man for months. Where does the vibrating razor get its magic? The question involves physics, biology, and some alchemy.
During my tenure at Mad Physics I’ve risked life and limb in countless ways, and today I go under the knife for the sake of science. I certainly didn’t look very happy (left) in my precarious state—five razor sharp blades vibrating against my unshaven skin. I could have been cut to shreds!
As it turned out though, I walked away not only unscathed, but marvelously shaved. It appears that the vibrating razor really did provide a closer, smoother shave. The science was a mystery though. Gillette explains, “With the M3Power, micro-pulses are sent to the blades making it dramatically easier to shave more thoroughly with one easy power stroke.” Other than sounding ridiculous (power stroke!), the explanation really doesn't tell us much. Therefore, we are left to ask the question, “How are these ‘micro-pulses’ sent, and how do they make it dramatically easier?” Let’s break it down one piece at a time. First off we'll cover the physics, or the mechanics of what actually makes the razor vibrate. Then we'll get to why any of that does any good, or the physiological explanation. There you have it, physics and biology living in perfect harmony, who would have ever predicted this happening?
The vibrator embedded in the M3Power and the Fusion is just like the vibrators in pagers, cell phones, and well, vibrators! The idea behind this oscillator is that of unbalanced weights. There is a 1.5V electric motor in the razor. When engaged, it spins; however, mounted on top of the motor is an unbalanced weight. As the weight swings to one side, some directional forces increase and the whole system shifts towards the weight. In this asymmetrical system, there is symmetry though. Since the motor spins rapidly, these shifts are only temporary because they are countered by other directional forces. This causes the whole system to be in a state of constant oscillation—i.e. back and forth movement.
After tearing apart the razor, I found that when pressing the button, one closes the direct circuit between the AAA battery and the motor, and razor could vibrate. Below you can see the wreckage, and the incredibly small motor:
The biological explanation revolves around the physiology of our hair follicles. Mammals have the ability to raise hairs; this razor depends on that ability. While humans cannot control their hair raising, it can be triggered. Attached to each and every follicle is a bundle of muscle fiber called the arrector pili, which as its name suggests, is responsible for raising hairs. This muscle is smooth muscle and not a skeletal muscle, so its functionality is controlled by the sympathetic nervous system. This means that we can only involuntarily flex this muscle—an example of this is goose bumps! In the case of the Gillette razor, the follicles on your face are reacting to the stimulus of vibration. The muscles contract, the hair stands perpendicular to your face, and the razor is able to shave better.
Below is a diagram with the arrector pili pointed out with an arrow:
Although
in chemistry a cation is a positively charged ion and an anion is a
negatively charged ion, these prefixes are actually switched when talking
about cathodes and anodes. 
When
phosphor (the screen) is exposed to radiation, it emits light The radiation
in this case is a beam of electrons. Any fluorescent color is really
a phosphor—fluorescent colors absorb invisible ultraviolet light
and emit visible light at a characteristic color.
Black
Powder (left) was first made in China during the Tang dynasty (~900
CE), and like everything else it was made by accident. There are some
early references to the concoction, but it wasn’t until the eleventh
century that it got its first real use. People used black powder for
weaponry (often launched by catapults or out of bamboo shoots), and
sometimes it was mixed with poisons like arsenic.
This lab demonstrates the principles above by launching a small film
canister through the expansion of gasses and thus by creating pressure.
It should be noted that although the materials involved in this lab
are rather trivial, you should be careful what type of film canister
you use. The ubiquitous black and grey cases found in the United States
are prone to having weak lids and thus generally let the pressure escape
with no bang! The translucent canisters are preferable. Since we had
none handy we bought a similar container from the container store.
different cookie
types and brands. Every cookie would have a compound similar to potassium
carbonate which breaks down under the heat of the oven to create CO2
gas that pushes the cookie out and makes it rise. I decided to use
HCl to make the cookie’s rising component break down into CO2;
however, there was so little that it was impossible to measure accurately.
Instead I decided to measure and compare a more abundant component,
salt. 
Furthermore
when we talk about remotes they would have to be 500 times brighter
than the 25 milliWatts the police tracks you with to beat the retroreflective.
Also seeing that remotes have short ranges, you may be out of luck
because at shorter range, the problem of jamming is worse. The police
LIDAR (laser radar) power grows as the range decreases, and your jammer’s
power grows exponentially slower. The reason jamming is not feasible
is that you have to broadcast into all directions, reducing the power
aimed at the LIDAR gun. So that is the disappointing answer, but instead
of leaving you with that, we thought we’d propose less intelligent
solutions! Clearly you could go out and buy jammers and other such
tools, but why not create our contraption:
Misconceptions
often get carried away. There is a new website called