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What is the relation between linear expansion coefficient (α), Areal expansion coefficient (β) and volume expansion coefficient (ϒ)
The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion and v2 = Volume at the end of expansion)
Air at a density of 1.2 kg/m3 flows in a straight duct such that the velocity at the centre is 12.5 m/s. the method factor for the velocity profile is known to be 0.80. The air flow encounters a symmetric expansion such that the cross- sectional are of the duct becomes double. The static pressure value at the inlet and outlet of the expansion are 60 Pa and 90 Pa respectively. Neglecting friction the shock pressure loss on account of expansion in Pa is
Statement (I): The Supersaturated expansion in nozzle is a process in which the steam expands beyond the saturated vapour line superheated condition. Statement (II): Steam cannot exist in superheated state when the expansion process in nozzle reaches the saturated vapour line
Let L1, L2 be any two context-free languages and R be any regular language. Then which of the following is/are CORRECT? I. L1 ∪ L2 is context-free II. L̅1 is context-free III. L1 – R is context-free IV. L1 ∩ L2 is context-free
Expansion of gas under zero pressure is free expansion.
Two processes X and Y need to access a critical section. Consider the following synchronization construct used by both the processes Process ? /* other code for process ? */ while(true) { varP = true; while(varQ == true) { /* Critical Section */ varP = false; } } /* other code for process ?? */   Process ? /* other code for process ? */ while(true) { varQ = true; while(varP == true) { /* Critical Section */ varQ = false; } } /* other code for process ? */   Here, varP and varQ are shared variables and both are initialized to false. Which one of the following statements is true?
In a reversible isothermal expansion process fluid expands from 10 bar and 2 m3 to 2 bar and 10 m3. During the process the heat supplied is at the rate of 100 kW. What is the rate of work done during the process
Consider the following languages L1 = {ap | p is a prime number} L2 = {anbmc2m | n ≥ 0, m ≥ 0} L3 = {anbnc2n | n ≥ 0} L4 = {anbn | n ≥ 1} Which of the following are CORRECT? I. L1 is context-free but not regular. II. L2 is not context-free III. L3 is not context-free but recursive. IV. L4 is deterministic context-free
Consider a given volume of liquid at a temperature T below Tm with a free energy G’. If some of the atoms of the liquid cluster together to form a small sphere of solid, the free energy of the system will change to G, given by________ (Assume V1 volume of the solid sphere, V2 volume of liquid, A is the solid/liquid interfacial area, γ solid/liquid interface free energy, G1 and G2 are the free energies per unit volume of solid and liquid respectively).