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1.A stream of liquid moving as low speed leaves a nozzle pointed directly downward. The velocity may be considered uniform across the nozzle exit and the effects of friction may be ignored. At a Nozzle exit the jet velocity and area are V and A, respectinely. Determine the variation of jet are with elevation.
2.Air at 400 kPa, 270 Kelvin, enters a well-insulated, horizontal pipe having a diameter of 2cm and exits at 90kPa, 200 Kelvin. Ideal gas model for air, determine at a steady state (a) The inlet and exit velocities, in m/s and (b) the mass flow rate, in kg/s
3.A 60 -m- long steel wire must not strech more than 48mm when the tension in the wire is 6 kn. Knowing that e-200GPa, determine (a)the smallestdiameter which may selected for the wire,(b)the corresponding value of the normal stress.
To float a 160 pound man using helium balloons (assume 0.52 cubic feet per inflated balloon). How many balloons would it take? Assume density of air is 1.29 kg/cubic meter and the density of helium is 0.179 kg/cubic meter.
A 30 feet column is braced at the mid-section to prevent premature failure. If the maximum load is 380 kips, select an appropriate W14 section, if any, to support the loading conditions.
Suppose that a person who boards the elevator on the ground floor gets off on the fifth floor. Assuming that the elevator has achieved operating speed by the time it reaches the second floor and that it is still moving at its operating speed as it..
The relative velocity of two infinitely wide parallel plates thatare 1cm apart is 10cm/s. If the dynamic viscosity of the liquid between the plates is 0.001 N s/m2 what is the shear stress between the plates?
Biota can uptake and bioconcentrate compounds through vapor phase absorption. For example, leaves exposed to elemental mercury vapors will absorb the mercury into the aqueous phase and the lipid phases of the leaves. Kow for mercury = 4.17.
A 100ft tape is calibrated at 68 degrees F, fully supported with 15 Ibs of tension and found to be 99.987 ft long. Is this tape is used fully supported with 15 Ibs of tension at 86 degrees F to measure a distance that is recorded as 136.48 ft,
The roadway is to be widened which will require a slope face cut at a steeper angle. Assume zero cohesion along the joints. What engineering parameter must the joint surfaces possess (magnitude) to be stable
abc-def-ghi are as follows 060-001-120 ltbrgtneed it in 2 hours please send it to me as soon as
The modulus of elasticity of the wood is 13GPa. If one side of the column is 25cm across, find the minimum dimension of the other side to keep the column's deformatin under 1.3 mm
If the 50-kg crate starts from rest and travels a distance of 6m up the palne in 4s, determine the magnitude of force P acting on the crate. The coefficient of kinetic friction between the crate and the ground is \mu_k=.25
The potentiometric surface elevations at two observation wells 1000 m apart are 52.35 m and 56.90 m. If the horizontal hydraulic conductivity of the auquifer is 25 m/ day determine the flow rate per unit width of the auquifer.
The platform itself weights 30 kN in air, and each cylinder weighs 1.0 kN per meter of length. What total cylinder length L is required for the platform to float 1 m above the water surface
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