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Chapter 37: Q. 13 (page 1082)
A cosmic ray travels through the earth’s atmosphere in, as measured by experimenters on the ground. How long does the journey take according to the cosmic ray?
t' = 346.4 micro sec
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Explain why the observation of alpha particles scattered at very large angles led Rutherford to reject Thomson’s model of the atom and to propose a nuclear model.
Suppose that in a hypothetical oil-drop experiment you measure the following values for the charges on the drops:,,, , and. What is the largest value of the fundamental unit of charge that is consistent with your measurements?
The wavelengths in the hydrogen spectrum with form a series of spectral lines called the Lyman series. Calculate the wavelengths of the first four members of the Lyman series.
Electrons pass through the parallel electrodes shown in with a speed of role="math" localid="1649760459253" . What magnetic field strength and direction will allow the electrons to pass through without being deflected? Assume that the magnetic field is confined to the region between the electrodes.
An oil droplet with excess electrons is observed between two parallel electrodes spaced apart. The droplet hangs motionless if the upper electrode is more positive than the lower electrode. The density of the oil is . What is the radius of the droplet?
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