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For spherical sand particles with Dp = 0.045 inches and the density of each particle is 145 lbm/ft3, estimate the minimum fluidizing velocity for air and for water. Assume a porosity of 32 percent. You may need to rederive Equation 11.41 considering the non-negligible density of the fluid - in the case of water. Assume a temperature 68 °F.
Find the position of the center of mass of the system of the sun and Jupiter. Since Jupiter is more massive than the rest of the planets combined.
a 1015-kg compact car is traveling north at 15 m/s when it collides with a 2102-kg truck traveling east at 10 m/s. The insurance adjuster has asked you to find the velocity of the wreckage just after impact. What do you tell him.
Dry air is contained in a tank with fixed volume at 200 degrees Celsius and a pressure of 5 bar. Then the fluid is heated so that its temperature reaches up to 300 degrees Celsius. If the volume of the tank is 0.2 m^3, find the transferred heat and f..
A thin-walled cylinder with open ends is subjected to constant torque of 150,000 lb-in. The cylinder is made of 2024-T3 Aluminium with a yield strength Y=50 ksi. The cylinder has a mean radius r=5in and a wall thickness of 0.05inches.
Consider A= 3i+j+2k. What is the length of A, Find the unit vector of A' in the same direction as A. What is the angle between angle A and the y-axis.
What is the lasting value of big international conferences on sustainable development and how likely do you think it is that sustainability can be achieved solely by individuals without systemic change?
Gasoline (density = 680 kg/m^3 and kinematic viscosity = 4.29x10^-7 m^2/s) is transported at a rate of 150 L/s for a distance of 2 km. The surface roughness of the piping is 0.03 mm. If the head loss due to pipe friction is not to exceed 10 m, determ..
A structural steel with a fracture toughness of 60 MPa(m^1/2) has no surface crack larger than 3.5 mm in length. By how much (in %) would this largest surface crack have to grow before the system would experience fast fracture under an applied stress..
A voltage signal ranges between -0.50 V and 1.00 V. The signal is to be sampled by an A/D converter that has an input range of 0 to 5 V. For maximum resolution, the signal is to be conditioned such that it fits the full input range of the A/D convert..
a 65.2 cm long straight section of wire is located entirely inside a uniform magnetic field of |B| = 0.190 T. Calculate the size of the current.
the following chemical reaction takes place in a bio reactor3a2b2 -gt2abab2the molecular weight of a is 10.0gmol and
Calculate the torque required at input T and calculate the magnitude and direction of the torque required to hold the gearbox stationary (holding torque Th). Show the direction of the holding torque applied to the shaft with the aid of a sketch.
liquid ice cream mix is cooled frozen and hardened from 4degc to -20degc at a rate of 10000 kghr. calculate the rate of
A beam with a rectangular cross section has dimensions of b =40 mm and t= 20 mm. The beam is made of 7475-T7351 aluminium and is subjected to a bending moment of M = 900 N*m
Draw a graph of system head and fluid power against flow rate on one sheet of graph paper, using the values determined in(c)
a flu epidemic starts by one infected person in an isolated population of n individuals. the rate at which the flu
suppose you are marooned on an exotic island where the natives happen to speak english. their ways are primitive
tarzan king of the jungle mass 66.2 kg grabs a vine of length 14.6 m hanging from a tree branch. the angle of the vine
a four cylinder two stroke diesel engine has a cut-off ratio of 1.8 and a compression ratio of 22. it operates with an
a 0.15 m3 container is filled with 0.1kg of air. the pressure of the container is lower than its ambient pressure and
fabricating metal parts by drilling holes in the metal can cause the parts to get quit hot. what will be the change in
an insualed piston-cylinder device contains 5 kg of satured mix of water initially at 100kpa and 6m3. now 3917kj of
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