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Chapter 37: Q. 30 (page 1083)
You learned in Chapter 36 that mass has an equivalent amount of energy. What are the energy equivalents in of the rest masses of an electron and a proton?
For electron mass is, and for proton mass is,
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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.
Express in (or or if more appropriate):
a. The kinetic energy of an electron moving with a speed of .
b. The potential energy of an electron and a proton apart.
c. The kinetic energy of a proton that has accelerated from rest through a potential difference of .
What are the wavelengths of spectral lines in the Balmer series with ?
A -diameter oil droplet is observed between two parallel electrodes spaced apart. The droplet hangs motionless if the upper electrode ismore positive than the lower electrode. The density of the oil is .
a. What is the droplet鈥檚 mass?
b. What is the droplet鈥檚 charge?
c. Does the droplet have a surplus or a deficit of electrons? How many?
What temperature, in 掳C, is a blackbody whose emission spectrum peaks at (a) and (b) localid="1649698615260" ?
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