Spectral Series: What is the longest wavelength in the Lyman Series?
A. 45.60 nm
B. 91.20 nm
C. 121.5 nm
D. 240.1 nm
E. 365 nm
Answer: C
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For a periodic process, the number of cycles per unit time is called the
A) amplitude. B) wavelength. C) frequency. D) period. E) pulse.
Which of the following methods used to determine the mass of a cluster of galaxies does not depend on Newton's law of gravity?
A) measuring the orbital velocities of galaxies in the cluster B) measuring the temperature of x-ray gas in the intracluster medium C) measuring the amount of distortion caused by gravitational lensing
The type of radio wave that produces the least static in a radio receiver is
A) AM. B) FM. C) neither of these
What is the potential difference VB ? VA when I = 0.50 A in the circuit segment shown below?
a.
+28 V
b.
+2.0 V
c.
?28 V
d.
?2.0 V
e.
+18 V