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A seesaw weighing 3 lb/ft of length is occupied by two children, each weighing 90 lb (see figure). The center of gravity of each child is 8 ft from the fulcrum. The board is 19 ft long, 8 in. wide, and 1.5 in. thick. What is the maximum bending stress in the board?
Exhaust (assumed to have the properties of standard air) leaves the 4-ft-diameter chimney shown in Fig. with a velocity of 6 ft/s. Because of the wind, after a few diameters downstream the exhaust flows in a horizontal direction with the speed of ..
If a super alloy jet engine is heated so that its length in each direction expands by 1%, what is its percentage change in volume (assume it is roughly cubic)?
A block is L = 1 [m] long and h = 0.5 [m] tall and weighs 50 [N]. The box is allowed to rotate about point A. A rope is attached to the upper left corner. This rope makes a θ=40° angle from the horizon. A horizontal force of 30 [N] is applied at th..
the distance required to stop an automobile consists of both thinking and braking components each of which is a
In undertaking the experiments above you should not only attempt to clearly explain the underlying theory, but you should also consider any errors in your measurements. Pay particular attention to exnlainine any curve fittinf that you may do.
air expands from 100kpa 40 degrees c with volume .75 m3 to 15kpa in a polytropic process with polytropic exponent n.
Consider a cable box with a tamper resistant private key inside it. Can you imagine a side-channel attack on the above implementation to find the private key? Hint: Can you do something with a multimeter?
juice is extracted from fruits such as apples by compressing and crushing them. based on your knowledge of
an unknown refrigerant is used in a refrigerator. a saturated mixure of 30 per cent quality exits the expansion valve
an ideal rankine cycle produces 100 MW of power. If the steam enters the turbine at 100 bar and 500C and is condensed at 1 bar, determine the flow rate of stream and the thermal efficiency.
Your rich godfather has offered you a choice of one of the three following alternatives: $10,000 now; $2,000 a year for eight yeaers; or $24,000 at the end of eight years
air is compressed in a steady-flow compressor via a polytropic process from 15 psia and 60 degree f state 1 to 75 psia
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