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A bungee cord stretches 2-4 times their unstretched length, and a jumper feels no more than 2.5-3.5g of acceleration. Assume the force in the cord has the math form ks-betas^3, where k and beta are constants and s is the amount of stretch in the cord past the unstretched length. Design a cord (design the constants k and beta ) so the cord stretches 2.5 times the unstretched length, and the acceleration of the jumper doesn't exceed 3g, and the cord has zero stiffness at the bottom of a 400ft drop.s=elongationk=spring constant
A mild structural steel beam has a solid square cross section of 100mm and is simply supported by two supports 3m apart. Calculate the dead load that can be safely supported when applied to the middle of the beam.
a steam turbine power plant is based on the ideal rankine cycle the working fluid is water. the heat transfer from the
A regenerative steam power cycle has a closed feed water heater that heats 20 kg/s of water from 100°C, 20 MPa to 250°C, 20 MPa. The extraction steam from the turbine enters the heater at 4 MPa, 275°C, and leaves as saturated liquid. What is the req..
At what equivalence ratio for octane-air mixtures does the carbon to oxygen ratio of the system equal one? Why is this of interest?
a slide projector contains a 500 w light bulb cooled by an internal fan that blows room air across the bulb at a rate
Consider a thermal energy reservoir at 1500 K that can supply heat at a rate of 150,000 kJ h-1. Determine the exergy of this supplied energy, assuming an environmental temperature of 25 oC.
The mean diameter of a conical friction clutch is 250mm with a width of the conical surface being 50mm. The clutch is lined with a material having a coefficient of friction of 0.25
what fraction n of the weight of the jet airplane is the net thrustnozzle thrust t minus air resistance r required for
An automotive radiator cools glycerine from 95 degrees C to 55 degrees C, Air flows through it, entering at 20 degrees C and leaving at 25 degrees C. If the radiator is designed to reject 25kW determine the mass flow rate of the glycerine
the steel bar has the orginal dimensions shown in the third figure below. if it is subjected to an axial load of 50kn
the combustion products in an internal combustion engine undergo an expansion process from an initial volume of 0.007
question 1 bending about two axesthe load p 2 kn is applied to the end of rectangular section cantilever beam shown
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