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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
Two rods, one made of brass and the other made of copper, are joined end to end. The length of the brass section is 0.280m and the length of the copper section is 0.720m. Each segment has cross-sectional area 5.90×103m2. What is the temperature of th..
The average intensity of sunlight reaching the earth is 1390 W / m2. A charge of 2.00 x 10^-8 C is placed in the path of this electromagnetic wave. What is the magnitude of the maximum electric force that the charge experiences
Bowling balls can be made from a variety of substances and are required to have a circumference of roughly 27.0 inches. calculate the thickness of the shell
A 10-m-long glider with a mass of 780kg(including the passengers) is gliding horizontally through the air at 30m/s when a 70Kg skydiver drops out by releasing his grip on the glider. What is the glider's speed
A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 14.0 m/s. With what speed and angle of impact does the stone land
A physics major is working to pay his college tuition byperforming in a traveling carnival. what is the magnitude of the normal force exerted on the motorcylce by thesphere at this point
a massless spring of spring constant 50 N/m is suspended vertically. Set the vertical origin to the natural length of the spring. what are the amplitude and frequency of the oscillations
An object of mass 3.0 kg and travelling at 2.0 m/s collides head-on with a 2.0 kg object travelling in the opposite direction at 3.0 m/s. Determine the velocity of each object after impact
The record for the highest speed achieved in a laboratory for a uniformly rotating object was 2.01e3m/s for a 0.15m long carbon rod
If we increase the intensity of a sound wave by a factor of ten thousand, obtain how much have we increased the loudness of the sound in decibels
A blackbody will emit less energy at higher frequencies.
A 32.0 kg child slides down a long slide in a playground. She starts from rest at a height h1 of 21.00 m. Calculate the mechanical energy lost due to friction
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