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The ground state 1s1 H atom has two hyperfine states, F = 0 and F = 1, which correspond to different relative orientations of the nuclear spin and electron spin. The transition between these two states has a wavelength of 21 cm and is one of the most important transitions in observational astronomy. The shape of our galaxy and many of its other properties were determined by measurements of this transition. Calculate the fraction of H atoms in each of these states at a temperature of 100 K. he F = 1 state is the ground state and there are no other states with significant population.
hemodialysis is a procedure that patients who have limited or virtually non-existent kidney function undergo to remove
Calculate the total energy due to dislocations for copper that underwent 20% plastic deformation, resulting in a dislocation density ofm-2.
the boom derrick supports a suspended 15-kip load. the booms bc and de are each 20 ft long. the distances are a 15 ft
feed at 10 ccelsius containing 20 solids enters an evaporator operating at 90 ccelsius. saturated steam90 quality
aluminum-copper alloy96 atom al 4 atom cu is solution-annealed at 550c and then aged at 450c. at 450c a cual2
Determine the average luminous exitance of the opaque interior surfaces of the room - what is the reflected component at this point?
water at 15degc is to be discharged from a reservoir at a rate of 18 ls using two horizontal cast iron pipes connected
Refrigerant 134a enters the compressor of an ideal vapor-compression refrigeration cycle as saturated vapor at 2108F. The condenser pressure is 160 lbf/in.2
you will learn how Disney applies industrial engineering principles and tools to improve the experience of its guests at various Disney resorts. In two paragraphs identify two specific processes that IE's at Disney are responsible for improving.
The specific volume of superheated steam is represented by pv 5 0.231(h 2 1943), where p is in kPa, v is in m3 /kg, and h is in kJ/kg.
a 2-2-2 kinematic coupling uses 19-mm silicon nitride balls and tungsten carbide vees. determine the hertz contact
A scuba diver descends to 40 meters below the surface and has a 10 liter tank that contains air at 9 MPA and 7 C. Assume that the water has a density of 1000kg/m^3 and that atmospheric pressure is 100 KPA. He breathes at 5/ liters/min. How long can h..
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