WOODS Is organic and will decay over time. In wetter conditions with decay will be quicker. It is also subject to conditions such as dry rot‚ or pests. The greater the density of wood‚ the greater its mechanical strength. Knots also contained‚ formed where branches grew from main trunk‚ or where a bud was formed. Can generate weaknesses‚ or be aesthetic. HARDWOODS o o Deciduous (leaf-losing) trees. Slower growing‚ making them denser. Some take up to 100 years to reach full maturity
Premium Woodworking joints Mortise and tenon Steel
loading points. These readings were then analysed to give the axial direct strains and stresses as well as the shear strains as stresses at the sites of the strain gauges. As a result‚ the stress distribution of the beam can be calculated. The aluminium alloy beam was tested and had a nominal cross-section 50 mm deep by 25 mm wide and was loaded on the 25 mm face. The beam was subjected to a “4-point bending” system to increasing loads up to 8 kN. The beam was experimented using an Instron testing
Premium Racism Health insurance Health economics
Metalloid From Wikipedia‚ the free encyclopedia |Metalloids | |[pic] | | | |[pic] | |
Premium Periodic table Chemical element
7. Conditions for Survival 7.1 Radiation shielding and temperature regulation For shielding the inhabitants of Cygnus from the harmful solar radiation‚ many metals are used. First of all polished silver is used that has an emissivity of only 2%‚ meaning that 98% of the incoming radiation is blocked by it. There are 10 layers of polished silver‚ with other materials in between. Therefore the10 layers of polished silver let less than 0.0001% of solar radiation to reach the interior of the settlement
Premium Nuclear power Nuclear fission Uranium
extraction of aluminium and titanium metals expensive? (Two reasons please) 18) Explain the technique by which copper can be purified. What is a use of pure copper? 19) Explain the processes of phytomining and bioleaching. 20) Why is recycling beneficial to the environment? 21) What % of iron comes from the blast furnace? What effect does this have on its properties? 22) Give some properties of low-carbon‚ high-carbon and stainless steels. 23) Why might an alloy of aluminium be preferable to
Premium Carbon dioxide Chemical element Carbon
CHAPTER - 13 MAGNETIC EFFECTS OF ELECTRIC CURRENT 1) Magnetic field and Field lines:- a) Magnetic field :- The region around a magnet where the force of attraction or repulsion can be detected is called magnetic field. Magnetic field around a magnet can be detected by using a magnetic compass. b) Magnetic field lines:- Magnetic field lines are the paths around a magnet along which the north pole of a magnetic compass needle tends to move. The magnetic field lines around
Premium Magnetic field
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Soft clean eraser Soft pencil (type B or HB is recommended) 0620/01 October/November 2008 45 Minutes *6400528663* READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples‚ paper clips‚ highlighters‚ glue or correction fluid. Write your name‚ Centre number and candidate number on the
Premium Oxygen Chlorine Hydrochloric acid
IGCSE PRE-AICE CHEMISTRY 0620 OFFICIAL STUDY GUIDE Notes: To avoid any confusion concerning the symbol for litre‚ dm3 will be used in place of l or litre.Valence electrons are known as valency electrons for this test. Nature of Matter The states of matter are solid‚ liquid‚ and gas‚ in respective order of kinetic energy. State of Matter | Definite Volume | Definite Shape | Solid | Yes | Yes | Liquid | Yes | No | Gas | No | No | Diffusion:
Premium Atom Metal Chemical bond
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education *4308315385* CHEMISTRY Paper 2 Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number‚ candidate number and name in the spaces at the top of this page. Write in dark blue or black pen. You may need to use a pencil for any diagrams‚ graphs or rough working. Do not use staples‚ paper clips‚ highlighters‚ glue or correction
Premium Calcium Oxide Carbon dioxide
Student Name (print): Vocational Area: Technology Assessor (print): Jim Gillain Tutor (print): Jim Gillain Unit and title of assignment: Unit 10 Properties of Materials 1: Classifying Materials Moderated by (print): BTEC in a Box Date: Group: Portfolio Ref (if applicable): Date assignment issued: Date Required: Date Received: Resubmission Required: Resubmission Received: Assessment Criteria No. Assessor decision on achievement Assessor’s Feedback / Student Action Points
Premium Carbon Carbon steel Steel