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Bundles of protein filaments inside tissue cells are structural elements that can generate contractile
force against the materials to which they adhere. Figure 3 shows struts called "stress fibers" that extend from one end of the cell to the other. These fibers are made of crosslinked, filamentous actin, with an average diameter of 2 µm and an effective "stiffness" E of 16 kN/m2.
If we assume the connections at either end of the stress fiber can be modeled as pins, how much force P,would the cell need to generate to buckle the longest of these stress fibers?
successive maximum displacements of a spring-mass-dashpot system shown by fig. 19.10 of vector mechanics for engineers
a diesel engine uses 54.4 kg of fuel oilh of calorific value 45 mjkg. the thermal efficiency of the engine is 25.
write a computer program or use an equation solver such as mathcad or tk solver to calculate and plot the s v a j
oil enters a counter flow heat exchanger at 450 k with a mass flow rate of 10 kgs and exits at 350 k. a separate stream
a refrigerator is to remove heat from the cooled space at a rate of 2300 kjmin to maintain it temperature
The coefficient of friction for the threads is 0.20. Determine the force P normal to the handle at D required - 80 mm 100 mmto raise a mass of 500 kg from the position shown and (b) to lower the load from the same position
A piston cylinder assembly which initially has a volume of 1m^3 is filled with .7 kg of air. The pressure on the air is always maintained at 1.2 bars. Heat transfer is allowed to take place until the volume is 60 percent of the initial value. You may..
A work platform is elevated on the end of a boom that has the ability to extend its length and vary its angle with respect to the ground. The platform width is large compared to the boom diameter so that it is possible to load the boom eccentrically ..
a bronze bushing is mounted inside a steel sleeve. knowing that the specific weight of bronze is 0.318 lbin3and of
a hollow steel shaft g 77.2 gpa allowable stress 50 mpa outer diameter 60 mm inner diameter 25 mm length 5 m
Given the planar velocity field vr = -A sin(?t) sin θ r 2 vθ = A sin(?t) cos θ r 2 , where A and ? are known constants, 1. Determine the vorticity.
A beaker of fresh water is in place on the scale when the 1-lb stainless-steel cylinder is added to the beaker. What is the normal force which the cylinder exerts on the bottom of the beaker? By how much does the scale reading increase as the cy..
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