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show that for isothermal atmosphere P2/P1 = e^-(g/RT)(x2-x1). The pressure at the base of a skyscraper is 14.7 psi and at the top of the skyscraper is 14.4 psia. the temperature is constant at 70 F i.e. isothermal atmosphere. How tall is the skyscraper?
Defluorination & adhesion properties, Using ion bombardment-If Teflon is deflorinated to increase it's adhesion properties, then what would the changes in surface characteristics be?
The overall reaction in a commercial heat pack can be represented as: 4Fe(s)+ 3O2(g) yields 2Fe2O3(s); delta H=1652 kJ
A synchronous motor operates continuously on the following duty cycle: 50 hp for 8 min, 100 hp for 8 min, 150 hp for 10 min, 120 hp for 20 min, and no load for 14 min.
A sealed rigid tank is filled with 1 kg of steam at 200 °C and 10 bar. What is the volume of the tank? 0.5 kg of steam are removed from the tank. If the temperature remains at 200 °C, what is the new pressure in the tank?
How much weight must it bear? Will your add-on lap tray user make the wheelchair user more or less independent? What type of materials should be used?
Find the rated and maximum torques.
If the system initially is an equimolar mixture of nitrogen and acetylene, what is the composition of the system at equilibrium? What would be the effect of doubling the pressure? Assume ideal gases.
High-density polyethylene may be chlorinated by inducing the random substitution of chlorine atoms for hydrogen.
Ac measurements with constant voltage amplitude reveal that the total core loss of a certain magnetic circuit is 10 W at f = 50 Hz, and 13 W at f = 60 Hz. Find the total core loss if the frequency is increased to 400 Hz.
The total series-field and armature-circuit resistances are 25 and 50 m Ω, respectively. The core loss is 220 W; friction and wind age loss is 40 W.
What is the probability that k columns in a random k x n binary matrix have rank k? How about the probability that k + 1 columns in this matrix have rank? Compute these two probabilities for n = 16 and k = 5.
From a three-phase, 60-Hz system, through a motor-generator set consisting of two directly coupled synchronous machines, electric power is supplied to a three-phase, 50-Hz system.
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