was multiplied by 100. Percent error for when m=20g is 7.24% and for m=40g‚ percent error is 30.43%. 4. Sources of error: Although‚ the air track was friction-less‚ the pulley that was bearing the weight‚ wasn’t friction-free. The friction from the pulley definitely played a role in the obtained G values Maybe the air track wasn’t fully friction-free due to technical difficulties‚ which accounts for the obtained
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opening. The relationship between the Reynolds Number and the friction factor was constant. Regardless of what the Reynolds Number was‚ the friction factor remained the same. This means that the valve head loss coefficient‚ K‚ only depended on the degree of opening of the gate valve. As the valve is slowly turned closed‚ the Major Head Loss due to friction along the pipe‚ decreases‚ and the Minor Head Loss‚ due to the friction through the gate valve‚ increases. There is a positive linear relationship
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A car is parked on a hill. In order to keep the car from rolling downhill‚ how great must the static friction acting on the car be? (Hint: Picture each scenario in your mind) equal to the force pulling the car downhill The object is experiencing some kind of friction A force is continuously applied to an object‚ causing it to accelerate. After a period of time‚ however‚ the object stops accelerating. What conclusion can be drawn? A tug-of-war that results in one team pulling the other across
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identifying a particular person 2. An identification specialist has to have and detailed understanding of biological structure of friction skin and understands the stages of friction skin development. They also have to be aware of the numerous factors that affect its growth. 3. Twins have the same DNA configuration but they do not have identical friction ridge configuration. 4. Marcello Malpighi from 1628-1694 was considered to be one of the first histologist. Histologist is a study
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un-notched specimen is comparable to that of a notched specimen. Similitude suggests that the component fatigue life of the two objects will also be similar. One example that we can give here is the ‘PIPE FRICTION APPARATUS’. Pipe friction apparatus has been designed for students to measure pipe friction losses for laminar and turbulent
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concepts like central composite design was used to estimate the behavior of welded joints. A four-factor‚ three- level Central Composite design was used. The parameters are varied such that a speed of 1000. 1500‚ 2000 rpm‚ burn off length of 2‚ 4‚ 6 mm‚ friction pressure of 40‚ 80‚ 120 MPa‚ upset pressure of 122‚ 146‚ 170 mm. From the micrograph of welded joint it was understood that flashes are formed around on both sides of the welded joint. Good weld joint was obtained. Tensile strength of the joint was
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With the friction belt on the brake disk completely disengaged‚ adjust the flow rate to obtain a pressure head of about 5 m at turbine inlet‚ as indicated by the pressure gage at the inlet. 3 Tighten the friction belt on the brake disk so that the difference in the tensions of the two spring balances is about 1 N. Read the tachometer to obtain the rotation speed. 4 Repeat step 3 until the maximum on the spring balance is reached‚ or the rotation speed is zero. 5 Disengage the friction belt and
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Bottomhole pressure measurement and analysis Various modes of fracture propagation can be inferred from straight-line periods that develop on log-log plots of net pressure versus time. These modes characterize different fracture shapes. Fracture closure and fluid leakoff parameters can be determined from the analysis of fracturing pressures resulting from closure (pump-in/flowback [PI/FB]) tests. Chapter 9 provides additional fracturing analysis information. Collection and analysis of
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accomplishing the author’s mission? What part of the book was the least effective? The part of the book that I think is most effective at accomplishing the author’s mission is chapter three: Challenges. ‘Friction dominates war‚ it makes simple tasks hard’. The author touches on how friction affects us anywhere from the marine-air-ground task force down to the most forward fighting positions and how getting over the brick wall that is adversity is key to being able to lead marines. 3.
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Topics • • • • Introduction Reynolds’ Experiment Dimensional Analysis of Conduit Flow Friction Factor for Fully Developed Laminar Flow Friction Factor for Fully Developed Turbulent Flow Smooth Pipe Law Rough Pipe Law Different Workers Results Application Energy/ pressure loss problem Velocity/ flow rate problem Pipe Sizing Problem • Explicit Equation for Friction Factor CN2122 / CN2122E Main Topics • • • Equivalent Diameter for Non- Circular Conduit
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