problem 261 A steel rod with a cross-sectional area of 0.25 in2 is stretched between two fixed points. The tensile load at 70°F is 1200 lb. What will be the stress at 0°F? At what temperature will the stress be zero? Assume α = 6.5 × 10-6 in/(in·°F) and E = 29 × 106 psi. Solution 261 For the stress at 0°C: answer For the temperature that causes zero stress: answer problem 262 A steel rod is stretched between two rigid walls and carries a tensile load of 5000 N at 20°C. If the
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Test A. Introduction As shown by the Griffith criterion‚ tensile strength of brittle materials is theoretical 1/8 of the compressive strength. Typically‚ tensile strength of rock materials is about 1/10 to 1/8 of the compressive strength. Hence‚ rock fails easily under tension. In design‚ rock should be subjected to minimum tensile stress. Several methods are commonly used to test the tensile strength of rocks: 1. Direct tensile test: Metal caps are cemented to the
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Do you think mental strength is just as important as physical strength in sports? After reading “Why We Run?” by Bernd Heinrich and “What Could Be Better than a Touchdown?” by Kelefa Sanneh‚ I agree-mental strength is just as important as physical strength in sports. In the excerpt “Why We Run?” the author Bernd Heinrich explores the physical‚ mental‚ and evolutionary processes that drive humans to run. In the article “What Could Be Better than a Touchdown?” examines how an easy touchdown generated
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What is Physical Education? Physical education should be regarded as a vital and dynamic aspect of every educational program. Physical education is education through human movement. It is the aspect of education that contributes to the total growth and development of the child mostly through selected movement and physical activities. It also enhances academic learning‚ helps meet the overall elementary school mission‚ employs authentic assessment strategies‚ treats students with dignity and
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research Physical activity for cancer survivors: meta-analysis of randomised controlled trials Daniel Y T Fong‚1 Judy W C Ho‚2 Bryant P H Hui‚3 Antoinette M Lee‚4 Duncan J Macfarlane‚5 Sharron S K Leung‚1 Ester Cerin‚5 Wynnie Y Y Chan‚6 Ivy P F Leung‚7 Sharon H S Lam‚8 Aliki J Taylor‚9 Kar-keung Cheng9 1 School of Nursing‚ Li Ka Shing Faculty of Medicine‚ University of Hong Kong‚ Hong Kong‚ China 2 Division of Colorectal Surgery‚ Department of Surgery‚ Li Ka Shing Faculty of Medicine
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Physical Fitness Physical fitness is one of the most important key to a healthy body. It is the basis of creative artistic activity. Physical fitness means the condition of being physically healthy‚ especially exercises and proper nutrition it even includes being mentally healthy. It is the reason‚ a state of general well-being marked by physical health and mental stability. Physical fitness is not just bending our body. It is about having cardiovascular and overall muscular endurance and strength
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There are many incidents in life that cause people to have a need for physical therapy. Whether it is a sports related injury‚ a car accident‚ or something out of the ordinary the need is there. Doctors recommend PT in most all cases. Physical therapy is an exercise treatment methodology aimed at the treatment and curing of certain physical ailments‚ through exercise and stretching. The primary aim for physical therapy (or physiotherapy)‚ is to get the patient well and back to normal‚ free from pain
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Physical examination Definition A physical examination is the evaluation of a body to determine its state of health. The techniques of inspection include palpation (feeling with the hands and/or fingers)‚ percussion (tapping with the fingers)‚ auscultation (listening)‚ and smell. A complete health assessment also includes gathering information about a person’s medical history and lifestyle‚ conducting laboratory tests‚ and screening for disease. These elements constitute the data on which a diagnosis
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Energy for performance year 11 phys ed term 3 – touch football Health – related * Aerobic capacity * Muscular strength * Muscular endurance * Flexibility * Body compisistion Sport/skill related * Muscular power * Agility * Speed * Balance * Coordination Aerobic capacity * Also called stamina‚ general endurance‚ heart-lung fitness * “The ability to keep producing energy aerobically and using it to perform tasks involving the whole body for extended
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Gender Dominance Grip Strength Introduction Grip strength can be used in determining the effectiveness of the different treatment strategies or procedures. Grip strength test provide and objective index of the strength of the upper extremities. (Singapore Med J 2002 Vol. 43) Studies have attempted to determine the differences in strength of left or right hand preference as well as dominant or non-dominant preference. Crosby et. Al investigated normative values of significant
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