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What is the relative fraction of H atoms that are ionized in stars with surface T=5800K and 11300K (the atmospheres were assumed to have the same pressure P=200 dynes per cm^2).
a. Find the relative number of neutral HI atoms in the first excited state (n=2) to those in the ground state (n=1).
b. Find the relative number of atoms in the stars atmosphere (i.e BOTH neutral and ionized).
A ring of charge of radius R meters has a constant charge density -lambda distributed uniformly along its length. Find the expression for |E| near the center of the ring
consider an npn transistor whose base-emitter drop is 0.76 v at a collector current of 10 ma. what current will it
Project Seafarer was an ambitious program to construct anenormous antenna, buried underground on a site about 10000km2 in area. What would be the period of the radiations emitted
A pitcher throws a curveball that reaches the catcher in 0.59 s, What is the angular displacement of the baseball (in radians) as it travels from the pitcher to the catcher
a nonconducting solid sphere of radius 2.9 cm carries a uniformly distributed positive charge of 8.6 x10-9 coulombs. a
Consider a series RLC circuit with R = 15 , L = 190 mH, C = 75 µF, and a maximum voltage of 142 V. What is the impedance of the circuit at resonance
If the highest acceleration the vehicle's brakes are capable of is -5 m/s2, what is the maximum reaction time of motorist that will allow her or him to keep away from hitting the deer.
q1. a 2.60- metal bar 1.50 long and having a resistance of 10.0 rests horizontally on conducting wires connecting it to
A 100 meter length of steel changes temperature by 30 C during the course of a day. If the coeffcient of thermal expansion of steel is 12 parts per million per C, what is the change in length of the steel
A 3.50-m-long, 360kg steel uniform beam extends horizontally from the point where it has been bolted to the framework of a new building under construction, What is the magnitude of the total torque due to the worker and the force of gravity
A rocket takes off vertically from the launchpad with no initial velocity but a constant upward acceleration of 2.25 m/s2. What is the maximum height the rocket will reach above the launchpad
A 41.5 g sample of chloroform is condensed from a vapor at 61.6°C to a liquid at 61.6°C. It liberates 9800 J of heat. What is the heat of vaporization of chloroform
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