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A sample of He + ions is prepared at a temperature of 298 K and a density of 2.0 # 1010 cm-3 . Because these are ions, magnetic ields may be used to trap those ions with kinetic energy less than some threshold value et . he faster-moving ions escape the trap and are lost. Our sample is placed in such a trap with a threshold energy et = 1.00#10-20 J, the fast ions are lost, and the sample is allowed to return to equilibrium (so the temperature is well-deined again). Write an expression for the new temperature of the sample
A vortex tube is used to separate an ideal gas at 10 bar and 375 K such that half the gas is collected in a cool stream at 1 bar and 255 K and the other half becomes a hot stream at 1 bar and 495 K. Assuming the process is adiabatic: is this process ..
A powder compact with a size of 1 mm is known to be sintered in one hour at 1600C. Assuming that densification occurs by lattice diffusion with an activation energy of 500 kJ/mol, plot the dependence of the required sintering temperature against p..
nitrogen gas is heated in a steady-state steady-flow process. the inlet conditions are 550 kpa 35degc and the exit
a rocket having a total mass of 8 mg is fired vertically from rest. if the engines provide a constant thrust of t300 kn
one method for strengthening an alloy is to use the process of precipitation hardening.a for the cu-sn phase diagram
Compute the horizontal and vertical forces exerted on the vane shown in Fig. 16.14 due to a flow of water at 50°C. The velocity is constant at 15 m/s.
the composite beam shown is fabricated by connecting two w6 x 20 rolled-steel members using bolts of 58-in. diameter
a heat pump is proposed that uses 50f ground water to heat a house to 70f. the groundwater experiences a temperature
consider a thermal insulated closed rigid tank which is divided into two parts a and b by a partition. initially part a
Given that annual demand for a product is 20,000 units, cost per unit = $6.00, holding cost rate = 2.5%/month, changeover (setup) time between products averages 2.0 hr
Consider the clamped-free column loaded as shown in Fig. 9.22. Here we take the load P not as the usual axial force, but directed along a line through x = 0. Explain why the buckling load of this problem is equal to that of a pinned-pinned column.
a power plant based on the rankine cycle is under development to provide a net power output of 10 mw. solar collectors
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