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If the pipe diameter is 30 cm, compare the head loss calculated from (a) the Darcy-Weisbach equation, (b) the Hazen-Williams equation, and (c) the Manning equation.
The angle between the velocity of the charge and the field is 54°. A force of magnitude 4.5 10-3 N acts on the charge. What is the magnitude of the magnetic field?
An electron is shot vertically straight up from the ground with a speed of 2.20 106 m/s. What is the magnitude of the acceleration caused by the magnetic force?
A mummy picks up a calculator and starts adding odd whole numbers together, in order: 1+3+5+....etc. What will be the last number the mummy will add that will make the sum on his calculator greater
Calculate the work necessary to compress air in an insulated cylinder from a volume of 6 ft^3 to a volume of 1.2 ft^3. The initial temperature and pressure are 50 F and 30 psia, respectively.
Calculate the work done by the gases, assuming they can be approximated by air with constant specific heats. Answer is 205 KJ/kg.
Determine the range of values of h for which the roller coaster will not leave the track at D or E, knowing the the radius of curvature at E is (rho)=75ft. Assume no energy loss due to friction.
An airplane wing modeled as a spring-mass system with natural frequency 40 Hz is driven harmonically by the rotation of its engines at 39.9 Hz.
A weight attached to a spring of stiffness 525 N/m has a viscous damping device. Determine the amplitude and phase when a force F = 2cos3t acts on the system.
If this same system is excited by a harmonic force of frequency 4 cps, what will be the percentage increase in the amplitude of forced vibration when the dashpot is removed?
What are the proper units for your answer to the last question? What is the net horizontal force exerted on the car by the tree?
The bungee cord has an undeformed length of 350 ft, what is the value of the bungee cord spring stiffness that will stop the person just at the surface of the water?
A 2.5 hp motor is used to move an 200lbf object across a horizontal surface at a velocity of 22 ft/s in a time period of 15 s.
Estimate how fast should the container accelerate in order to maintain the shown condition. Suppose the container slows down gradually and stops at the slope in the condition shown.
Compute the load that will compress the combined bar a total of 0.03 in. in the length of 5 ft. E for the cast iron = 15 x 106 psi and E for the steel = 30 x 106 psi.
A 50 kg crate resting on a flat smooth surface is acted upon by a horizontal force that varies by the equation F=1.5x where x is horizontal displacement in units of m.
What is the speed when the object has moved 25 m if coefficient of kinetic friction between the object and floor is 0.25?
A pure aluminum conical section with Cross Sectional diameter of D= ax^(1/2). The lateral surfaces are well insulated. Determine an expression for temperature distribution assuming 1D heat transfer.
Deternine the duct length required to reach Mach 0.6. Determine the length required to attain Mach 1.0 (C) Now suppose that an additional 750 mm of duct length is added.
Find the velocity profile for Couette flow where the inner rod is rotated with speed. Neglect gravity. Do not assume that the gap is small compared to the radius.
What is the value of delta S for this process? How much work, Ws, is needed per mole of air for the compression? 3. How do you account for excess temperature?
Calculate the velocity of air at the entry in ft/s; the rate of work exchanged between the compressor and its surroundings in Btu/s.
Draw a schematic and show the control volume you have selected; Calculate the diameter of the pipe; and Calculate the velocity of the refrigerant at the exit of the pipe.
The pressure-volume relationship is pV^1.1 = constant. For the propane, evaluate the work and heat transfer, each in kJ. Kinetic and potential energy effects can be ignored.
Calculate the magnitude of the heat transfer during the process. Is the heat transfer into the carbon monoxide or out of the carbon monoxide.