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Pulse compression by SBS. Explain qualitatively why the Stokes radiation excited by SBS in the backward direction can be considerable shorter in duration than the exciting radiation. How must the physical length of the interaction region be related to the duration of the laser pulse in order to observe this effect? Write down the coupled-amplitude equations that are needed to describe this effect and, if you wish, solve these equations numerically by computer. What determines the minimum value of the duration of the output pulse
Twenty years of annual maximum rainfall depths are given below. Determine the rainfall depths to be used for storm structure design for the following annual return periods: 2, 5, 10, 25, 50, & 100 year.
an operator at a wastewater treatment plant decided to increase the SRT from 5 days to 10 days. How will this change affect: a) the oxygen requirement b) MLVSS in the aeration tank.
A 300-acre forested watershed in fair hydrologic condition located on the clayey flat coastal region of Southern California receives 4.0 in. of rain in a 24 hr period.
Now you want to improve the efficiency and circulation rate. You suggest operaing the cycle utilizing two reversible tubines with saturated vapor exit streams. All conditions remain the same except that the feed to the first turbine is steam at 450 C..
An offshore drilling rig is being towed out to sea. What is the maximum distance away that the navigation lights can still be seen by an observer standing at the shoreline
a) Calculate Darcy's velocity of the groundowater as well as the amount of water that passes through the aquifer each day. b) for the same aquifer, determine the seepage velocity of water through aquifer if the effective porosity is 32%.
If the temperature of rod CF is increased by 10 degrees C and that of rod BC is decreassed by 40 degrees C, determine the normal stress in rod AD. The rods are two meters long.
The company would like to distribute the songs between the two CDs such that the used space on each CD is about the same. Formulate the problem as an IP, and find the optimal solution.
In the field, if the relative compaction is 90%, determine the hydraulic conductivity of the sand in the field compaction condition (given that k for the sand at the maximum dry density condition is .040 cm/sec and Gs = 2.65).
If the difference in weight between the two baskets must greater than 15 lb they will not have the strength to operate the pulley. The King weighs 195 lb, the princess weighs 105 lb, and the prince weighs 90 lb.
Discuss the advantage of maintaining water: cement ratio against the workability of concrete
A chemical plant uses a tube-within-a-tube counterflow heat exchanger to heat air with the use of steam. During steady state operation, the air flows into the exchanger at a rate of 5,000 kg/h and a temperature of 27C and exits at a temperature..
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