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1.Air at 37 psi and 60oF is being forced into a tire at a velocity of 180 ft/s through a ¼ in. diameter opening. The tire has a volume of 17 ft3. Determine the rate of change of density in the tire. (3.01 *10-5 slugs/ft3 s)
2.A centrifugal water pump has an impeller with r1 = 4”, r2 = 12”, ?1 = 160°, ?2 = 170°. The impeller is 2” wide at the inlet end and ¾” at the outlet. For a speed of 1800 rpm, neglecting losses and vane thickness, determine the discharge (in ft3/sec) for shock-less entry (?1 = 90°), the Torque and the angle, ?2 at the exit for the first problem in degrees.
3.An air compressor is used to pressurize a cylindrical tank which contains air at atmospheric pressure. The tank’s diameter is 3 ft and it is 5 ft long. The supply line is 1 inch in diameter. The air compressor’s output pressure is a constant 80 psi at 90oF with a 10 ft/s velocity. The tank’s temperature stays at a constant 70oF. Determine the time required for the tank pressure to reach 50 psi. (995 s or 16.58 min)
Estimate the velocity with which you would contact the ground if you jumped from an airplane at an altitude of 500ft and a) air resistance is negligible, b) air resistance is important, but you forgot your parachute, and c) you use a 25-ft-diameter p..
time(in months) after a computer of brand is sold and needed repair is normally distributed with mean 36 months and standard deviation 4 month. if 1% of the super computer need services less than k months after they are sold, find the value of k.
A single source of BOD causes an oxygen sag curve with a minimum downstream DO equal to 6.0 mg/L. If the BOD of the waste is doubled (without increasing the waste flow rate), what would be the new minimum downstream DO
The settlement of a laboratory 10-cm thick consolidation specimen is 5 mm in 1 hour with a coefficient of consolidation of 0.005cm2/s. What will be the total settlement
Compute the ratio of the nominal flexural strength of the beam to the maximum service load moment, and compare your findings to the ACI load factors and strength reduction factor.
A baseball is hit from home plate and travels over the center field fence. What would the trajectory of the baseball look like if air-resistance was not factored in
Using pie method, derive an expression for the velocity of a jet of viscous liquid issuing from an ori ce under static head if this velocity depends only on head, ori ce diameter, acceleration due to gravity, viscosity and density of fluid.
A present sum of $50,000 at an interest rate of 12% per year compounded quarterly is equivalant to how much money 8 years ago
Briefly describe the simplest heat treatment procedure thatwould be used in converting a 0.76 wt% C steel from onemicrostructure to the other, as follows:
when a force F acts on a linear spring, the elongation x of the spring is given by F=kx, where K is called the stiffness of the spring. Determine the dimension of K in terms of the base dimensions of an absolute system of units
The concentration of CO2 is 400ppm what is the equivalent concentration in ug/m^3 at temperature of 22C & pressure of 103.198 kPa.
FeCl3 is added to remove excess phosphate. The following reactions occur (the charges are in parentheses): FeCl3 -> Fe(3+) + 3Cl(-) Fe(3+) + PO4(3-) -> FePO4 The equilibrium constant for the second reaction is 10^26.4.
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