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1) You are examining the light spectrum from a hot galactic gas. From the frequencies in the spectrum, you conclude that the gas is mostly made of hydrogen. From the relative intensities of each part of the spectrum, you deduce that for every 12 hydrogen atoms in the first excited state, there are 3 in the second excited state. In order to double check your conclusions about this gas's properties, you decide to predict how many hydrogen atoms are in the third excited state, relative to the 1st excited state (which you can then subsequently compare to measured values). Looking up in a table, you find that,
a) the ground state has an energy of -13.6 eV, with a degeneracy of 1
b) the first excited state has an energy of -3.4 eV with a degeneracy of 4
c) the second excited stat has an energy of -1.5 eV with a degeneracy of 9
d) the third excited state has an energy of -0.85 eV with a degeneracy of 16
A softball of mass 0.220kg that is moving with a speed of 8.5m/s collides head-on and elastically with another ball initially at rest. find the velocity of the target ball after the collision
A puck mass m=0.4 kg is sliding on a frictionless surface at a speed v=2.50 m/s in the x direction and I hits another puck o mass m= .2 kg at rest at the origin. what are the final speeds of the particles
A student of weight 660 N rides a steadily rotating Ferris wheel (the student sits upright). At the highest point, the magnitude of the normal force FN on the student from the seat is 551 N.
A typical helium-neon laser found in supermarket checkout scanners emits 633nm--wavelength light in a 1.1mm diameter beam with a power of 1.0mW. What is the amplitude of the oscillating magnetic field in the laser beam
The inductance of a closely packed coil of 400 turns is 8.0mH. Calculate the magnetic flux through the coil when the current is5.0mA
A less dense liquid of density ρ1 floats on top of a more-dense liquid of density ρ2. Find what fraction of the length is in the more-dense liquid
A spacecraft with circular (north and south sides) of diameter 32 meter passes Earth moving eastward (in relation to you)), Find the speed of the spacecraft in units of c, the speed of light in a vacuum
When an objectis placed 132cm from diverging thin lens, itsimage is found to be 66 cm from the lens. find Where is the image of the object now
A speed skater moving across frictionless ice at 8.6 hits a 5.5 -wide patch of rough ice. She slows steadily, then continues on at 6.3 . What is her acceleration on the rough ice
A train travels due south at 60 m/s. It reverses its direction and travels due north at 60 m/s. What is the change in velocity of the train
A rope of negligible mass is wrapped around a 225 kg solid cylinder of radius 0.40 m. The cylinder is suspended some meters off the ground with its axis oriented horizontally, and turns on that axis without friction.
Passengers riding in the Great Six Flags Air Racer are spun around a tall steel tower (see the figure). Calculate the speed of the planes
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