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1. In an intense electron bombardment of the hydrogen atom, signi?cant electromagnetic radiation is pro- duced in all directions upon decay. Which emission line would you expect to be most intense? Why?
2. Why are peaks due to higher-lying excited states in the Franck-Hertz experiment not more observable?
3. As the voltage increases above 5 V in the Franck-Hertz experiment, why doesn't the current suddenly jump back up to the value it had below 5 V?
4. Using Hg gas in the Franck-Hertz experiment, approximately what range of voltages would you expect for the ?rst peak? Explain.
One runner ran the 100-m dash in 11.9 s. Another runner came in secona at 12.4 s. Assuming that the runners traveled at their average speeds for the entire distance, determine the sepaaration between the two runners when the winner crossed the fin..
A tank of 0.5 m3 volume contains compressed air. A valve is opened and air escapes with a velocity of 220 m/s through an opening of 100 mm2 area. Find the rate of change of density of the air in the tank at this moment
we can understand how pressure in water depends on depth by considering a stack of bricks. for a stack of bricks the
The cord between the pouch and the person's hand has negligible mass and will break when the tension in the cord is 33.0 N or more. Assume the sling thrower could gradually increase the speed of the stone.
Electrons are used in a single-slit diffraction experiment. Such an experiment works well if the slit has a width of 10 times the wavelength. what is the electron energy
A 15 g bullet strikes and becomes embedded in a 1.10 kg block of wood placed on a horizontal surface just in front of the gun. what was the muzzle speed of the bullet
A uranium atom is ionized seven times, losing seven electrons inthe process. Its resulting mass is 3.90×10−25 kgand it is given a kinetic energy of 3000 eV. If it circles ina magnetic field at a radius of 4.00 m, what isthe strength of the magnetic f..
On a summer day in Houston, thetemperature is 35C and the relative humidity is 77%. What is the humidity
At the local swimming hole, a favorite trick is to run horizontally off a cliff that is 8.9 meter above the water. Find the number of revolutions she makes while on the way down
An automobile having a mass of 1,000 kg is driven into a brick wall in a safety test. The bumper behaves like a spring with constant 5.85 106 N/m, What was the speed of the car before impact
question what is the maximum possible coefficient of performance of a heat pump that brings energy from outdoors at
A machine in the factory needs 38 V to operate. The power in the factory is different from that, what is the voltage of the electrical power system in the factory
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