second floor bridge‚ with the third floor walkway set off to the side several meters away from the other two. Construction issues led to a subtle but flawed design change that doubled the load on the connection between the fourth floor walkway support beams and the tie rods carrying the weight of the second floor walkway. This new design could barely handle the dead load weight of the structure itself‚ much less the weight of the spectators standing on it. The connection failed and both walkways crashed
Premium Hotel Hyatt Regency walkway collapse Hyatt
hazardous‚ or impossible. The most common form of wireless power transmission is carried out using direct induction followed by resonant magnetic induction. Other methods under consideration include electromagnetic radiation in the form of microwaves or lasers. Energy transfer and efficiency The general principle is that if a given oscillating amount of energy (for example alternating current from a wall outlet) is placed into a primary coil which is capacitively loaded‚ the coil will ’ring’‚ and form
Premium Electromagnetism Electricity Transformer
If the stopping potential is 1.3 V‚ estimate the work function of the metal. How would the photo cell respond to high intensity (105 Wm-2) red light of wavelength 6328 A produced by a He - Ne laser? Q.7. Plot a graph showing the variation of photoelectric current with anode potential for two light beams of same wavelength but different intensity. Q.8. Which experiment proved the existence of De’Broglie waves? Q.9. Two metals “X” and “Y” have work functions 2ev and 5ev respectively. Which
Premium Light Electron Photon
communicatu Recent Trends in Wireless Radio and Satellite Communication Gori Shankar1‚ Rajiv Kumar2 Suresh Gyan Vihar University‚ M.Tech (VLSI) 1 ‚Jaipur Engg. College‚ B.Tech (ECE) 2 gssharma1951@gmail.com‚rajivresnick@gmail.com Abstract- In this paper we discussed satellite and radio communication links. Satellites have evolutionized communication. Satellite and radio communication
Premium Satellite Radio Communications satellite
incredibly inexpensive to manufacture. The design that makes this possible is a simple one: The CD surface is a mirror covered with billions of tiny bumps that are arranged in a long‚ tightly wound spiral. The CD player reads the bumps with a precise laser and interprets the information as bits of data. The spiral of bumps on a CD starts in the centre. CD tracks are so small that they have to be measured in microns (millionths of a meter). The CD track is approximately 0.5 microns wide‚ with 1.6 microns
Premium Computer data storage Laser Light
Many popular name brand car companies expect driverless cars to be on the market by 2020‚ and for all cars to be driverless by 2025. The idea of a car that can drive‚ navigate‚ and park itself was an idea only to be heard of in the movies‚ but now it is in it’s final stages of testing. The self driving car is currently in production of prototypes to be demonstrated to the public by popular name brand companies like: Tesla‚ Mercedes Benz‚ BMW‚ and more. With the introduction of a driverless car‚ the
Premium Automobile Tram accident Traffic collision
lens formula‚ nodal planes‚ system of two thin lenses‚ chromatic and spherical aberrations. 3. Physical Optics (a) Interference Interference of light-Young’s experiment‚ Newton’s rings‚ interference by thin films‚ Michelson interferometer. Multiple beam interference and Fabry-Perot interferometer. Holography and simple applications. (b) Diffraction Fraunhofer diffraction-single slit‚
Premium Quantum mechanics Electron
Chapter 1 SECURITY ESSENTIALS 1. Introduction to Security Engineering 1.1 Security engineering is about building systems to remain dependable in the face of malice‚ error‚ or mischance. 1.2 It focuses on the tools‚ processes‚ and methods needed to design‚ implement‚ and test complete systems‚ and to adapt existing systems as their environment evolves. 1.3 Security engineering requires cross-disciplinary expertise‚ ranging from cryptography and computer security through
Premium Access control Physical security Light
equipments‚ such as casting ‚ heat treating‚ welding‚ machining and so on .The production equipments include φ10m～φ2.5m large sized vertical lathe group‚ Φ10m～Φ3.2m large sized gear-hobbing machine group‚ XK2755×200/ 25×20 numerically controlled portal boring-milling machine with fixed beam‚ large size numerically controlled heavy veneer reeling machine‚ φ6.3×20m cylinder lathe‚ 6m×6m×16.5m electrical heating automatic annealing furnace‚ six 150 tons Lincoln welding production line etc. The company has passed
Premium Industry Production line Diesel engine
150-mm integrating sphere equipped with a microfocus lens and mechanical iris to establish a beam size of 2 mm. All sample spectra were referenced to a Spectralon reflectance standard. For visualizing the light scattering patterns of the decoys a Fianium SC450 supercontinuum laser was used in a dark room. This laser was able to produce wavelengths from 450 to 2‚400 nm at an average power of 4 W. A beam sampler was used to reduce the power to 1% of the original power to prevent the decoy getting
Premium Chemistry Silver Hydrogen