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Consider a Shamir (7, 4)-threshold scheme in GF (23), where the participants 1,3,4, and 6 pool their shares (1,13), (3, 19), (4, 19), and (6, 6) to retrieve the secret S. What will this secret be? Suppose that participant 5 shows his share (5, 3). Why is one of these five people lying? Let all also participants 1 and 8 contribute there share: (2, 4) and (8, 12). Determine the liar and the real secret.
Problem 1: For the circuit given in Figure 1 the power factor is 0.72 lagging and the power dissipated is 375 W.
Develop a simplified form of the general steady-state entropy balance appropriate to each operation. State carefully, and justify, any assumptions you make.
The temperature of the cold tap water is 22.0C, and the temperature of the hot tap water is 55.0C. If a student starts with 90.0 g of cold water, what mass of hot water must be added to reach 37.0C? Explain in detail how you arrived at your ans..
The uniform air gap is of length 1 mm, while the armature diameter is 0.5 m, and the axial length of the machine is 1.5 m. The field winding carries a current of 1 A (dc) and the rotor is driven at 3600 r/min.
The limestone is supplied with average dimension 1.5 cm and must be reduced to 20 mesh before feeding to the gasification process. Recommend equipment to achieve the desired particle size and estimate the work required.
What is the speed of the rotor field at full load (i) with respect to the rotor? and (ii) with respect to the stator?
Determine the location and the value of the point charge.
It is further reported that 53% of the heat added during the heating step is rejected during the cooling step. What is your evaluation of this process?
Determine whether the system is best described by the Margules or the van Laar equation and determine the parameters of the corresponding equation.
Explain why the fugacity coefficients of H2 S in the liquid and in the vapor are equal at 5.76 bar but different at 36.99 bar.
Following a procedure analogous to that in Example 5.2, obtain an expression for the coefficient of thermal expansion based on the van der Waals equation of state. Use the result to calculate the value of β for oxygen at 20 °C, 30 bar.
A sinusoid with the frequency of 125 kHz is sampled at 70,000 samples per second. What is the apparent frequency of the sampled signal?
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