Chuck Fletcher - Nightly. Mini BoostPack 12V Capacitor Car Battery. You might like to research the formula for energy storage in a capacitor, namely e=0.5×C×v^2, closely resembling newton’s ke=0.5×m×v^2 When you connect two capacitors in series, you get half the capacitance but twice the voltage.
Given the energy storage formula’s v^2 term vs the linear C term, this means you get twice the energy storage. So yes, his 6x350F capacitor bank gives 350F/6=58.3F, but 350F,2.5v=1093J, and 58.3F,15v=6558J so conservation of energy is preserved. YES, charge storage is reduced. However, potential energy is voltage * charge, and every extra capacitor increases the energy stored. For the purpose of starting cars, the (whatever) must supply several hundred amps at minimum 10v for a few seconds. In this application, as long as the (whatever) can 1) supply the required current and 2) maintain sufficient voltage for the required period, it *will* succeed.
In order to start a car, the (whatever) *must* have a sufficiently low ESR, or it could not supply the current. Electromagnetic Field Shielding Fabrics - Nightly. Ultra-Low Cost Conductive Fabric Perfect for bedding, clothing, wraps and drapes.
Impressive conductivity in a completely non-toxic format. Cotton Grid Fabric is the perfect choice when you want an all natural conductive fabric. Anti-static properties will discharge what ever it comes in contact with. 2 simple ingredients: Cotton and pure Silver fibers which make a distinct grid patternIdentical on both sidesCompletely comfortable and safe for skin contactVery conductive: ~10 Ohm/sqGroundable and anti-staticWashable, cuts and sews like ordinary fabricProvides ~50% reduction of RF signals too! Super wide 112 inch format makes it ideal for most projects. 3.5% Silver, 96.5% Cotton; 135 g/m²; 112 inches wide (9.3 feet) PDF specification sheet Cotton Grid (Cat. Roll Surcharge .......... $10.00. Rodin Coil Effects Demonstration Alternating Current (120 Volts) - YouTube - Nightly.
Computable Document Format (CDF) for Interactive Content. Heal thyself: The 'bio-inspired' materials that self-repair. An optical microscope image of a self-healing polymer, with microcapsules containing a red healing agent embedded in the material.
Optical microscope image of a self-healing polymer in action, as microcapsules containing a red healing agent begin to rupture as a crack progresses through the material. This image, taken using a scanning electron microscope, shows a ruptured microcapsule contained in a self-healing epoxy. The emerging world of self-healing materials Materials which heal themselves when damaged are expected to hit the market in 2013Some of these "bio-inspired" materials use a model based on veins to release healing agentsThey have potential to lengthen the the lifetime of products and reduce demand on raw materialsSelf-healing coatings to protect marine structures from corrosion will be released this year When damage occurs, they go to the site of the damage and can actually heal underwater without the presence of oxygenAutonomic Materials CEO Joe Giuliani.
Justin Beckerman builds working one-man submarine. The submarine's body may be constructed from drainage pipes and the hatch from a recycled skylight, but according to its 18-year-old inventor, this single-person U-boat can plunge to a depth of 30 feet and has already completed three successful dives.
The Nautilus took high school inventor Justin Beckerman just six months and $2,000 to put together -- all while keeping on top of his homework. "He has been building things since he was two years old," says his mother, Jess Beckerman. "If we tried to help him we would just get in the way and mess things up. " The submarine has ballast tanks to maintain its depth and equilibrium; air vents that bring oxygen down from the surface; a functioning PA and a range of emergency systems including back-up batteries, a siren, strobe lights, a breathing apparatus and a pump to fight leaks. The vessel can remain submerged for up to two hours and travels beneath the waves at one and a half miles per hour. Read: Spectacular tech 'firsts' up for auction. Graphene: the nano-sized material with a massive future. Graphene is the world's first two-dimensional material to be discoveredNo material is stronger, thinner or more conductive than grapheneMIT professor Tomas Palacios says graphene will change all our lives Numerous applications for graphene in fields of computing, energy and medicine (CNN) -- Ever since it was discovered in 2004, graphene has been hailed as a natural wonder of the materials world destined to transform our lives in the 21st century.
Graphene's amazing properties excite and confound in equal measure. How can something one million times thinner than a human hair be 300 times stronger than steel and 1,000 times more conductive than silicon? CNN Labs asked the head of MIT's graphene research department, Tomas Palacios, to explain why graphene is such a special material and what we can expect it to do for us in the future.