relevant only in the case of systems where we can identify a principal axis. Such systems are called axial systems. In the case of tetrahedral‚ octahedral‚ cubic‚ icosahedral and dodecahedral objects we cannot identify the principal axis. Solids of these structures are called platonic solids. Crystals and molecules of these shapes are highly symmetric and can be called multi higher order axial systems. They have several higher order axes than C2 axis. The symmetry elements combine in definite
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the jib). D = Distance from the hinge axis to the face of the column. dc = Column depth. tf = Column flange thickness. For an HSS column‚ torsion manifests itself as a shear stress in the walls (fs = T/2bht) and thus is not directly additive to axial and bending stresses. This shear stress should be evaluated separately by the designer and‚ if significant‚ should be checked along with bending
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planning‚ hazard assessment‚ etc. Earth-Sun relationship Most Physical Processes on Earth powered by incoming radiation from Sun. Earth-Sun Relationship Complex – Depends on: Latitude Position of Sun in Sky Time of Year Earth’s Rotation/Axial Tilt Our Place in Space Big-Bang Theory Milky Way Galaxy Our Solar System Shape of the Earth Oblate Spheroid Variation in Sun Angle by Latitude Subsolar Point The Sun About 4.6 Billion Years Old Average Star‚ Nothing special 100 times diameter
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discovered something in northeastern Ethiopia that seemed to be the skeleton of an ape. The skeleton was 40 % complete. It consisted of skull fragments‚ a lower jaw‚ ribs‚ an arm bone‚ a portion of a pelvis‚ a thighbone‚ and fragments of shinbones. It was thought to be a female adult about 3.5 million years. Dr. Johanson believed that this ape was very human-like and said that she started evolving into a human. Close to the skeleton‚ they found footprints that were in the shape of a human foot. Dr
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Micrometer From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search This article is about the measuring device. For the unit of length‚ see Micrometre. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (September 2011) Modern micrometer (value: 1.64 milimeters) Outside‚ inside‚ and depth micrometers A micrometer (pron.: /maɪˈkrɒmɨtər/
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FENDER MARINE CYLINDRICAL FENDERS (Ship Fenders). Cylindrical fenders are commonly used fenders recommended for all types of application to ensure a safe and linear berthing for the different kind of vessels. Cylindrical fenders are an economical solution to protect most of the berthing structures and offer much ease for installation. With 50% design compressive deflection‚ this kind of rubber fender can effectively buffer the collision between docks and ships. FENDER MARINE Cylindrical
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780327 m/s2[15] 0.99732 g | Escape velocity | 11.186 km/s[3] | Sidereal rotation period | 0.99726968 d[16] 23h 56m 4.100s | Equatorial rotation velocity | 1‚674.4 km/h (465.1 m/s)Template:Convert/track/abbr/onTemplate:Convert/track/adj/[17] | Axial tilt | 23°26’21".4119[2] | Albedo | 0.367 (geometric)[3]0.306 (Bond)[3] | Surface temp. | min | mean | max | Kelvin | 184 K[18] | 288 K[19] | 330 K[20] | Celsius | −89.2 °C | 15 °C | 56.7 °C | | Atmosphere | Surfacepressure | 101.325 kPa (MSL)
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(jet) type motor suitable for aircraft propulsion? a) Sir Frank Whittle b) Sir Henry Royce c) Hon. Charles Rolls d) Henry Ford 2. What is an advantage axial flow compressors have compared to centrifugal compressors? a) Axial flow compressors are less complicated b) Axial flow compressors are lighter c) Axial flow compressors can surge d) Axial flow compressors achieve higher pressure ratios 3. Which type of thrust reverser is fitted to the Tornado? a) Translating cowl b) Pivot doors c) Transmission
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Table of Contents Transmission Media What is transmission media? What are the types of transmission media? Describe bound transmission media. Describe unbound transmission media. Bound Transmission Media Explain twisted pair cable. Explain Co-axial cable. Explain Fiber-Optics cable. 1 1 1 1 1 1 1 4 5 Match the following types of connectors with the cables to which they are used. 7 Compare BNC with UTP Cables Unbound Transmission Media Explain Radio Wave. What is Microwave? List the Advantages
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Cnidarian have two germ layer. Cnidarians can be in two forms‚ polyp and medusa and the hydra is in the form of polyp. The gastrovascular cavity that is joined to the mouth of the cnidarian acts in digestion‚ gas exchange and also acts as the hydrostatic skeleton (Sadava et al.‚ 2011). The hydra usually lies on a basal disk‚ which it uses to move around with the help of mucous secretion. They can move around by somersaulting and attaching itself onto the substrate with its tentacles and then twisting over
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