What value of n corresponds to a wavelength of 91.7 nm in the Lyman series?
A) 3 B) 5 C) 1 D) 13 E) 9
D
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Suppose the entire solar nebula had cooled to a very low temperature before the solar wind cleared it away. Do you think Earth would be the same? Why or why not?
What will be an ideal response?
A mandolin is a stringed instrument that consists of 4 pairs of identical strings. Each string in a given pair should be at the same tension as its mate and so should produce the same fundamental frequency. Often such strings may be tuned relative to each other by listening for the beat. As you adjust the tension on one of the strings and you feel the beat frequency, you know that the strings are
closer to being tuned to the same frequency under which of these conditions? 1.The beat frequency gets larger and larger as you adjust the tension. 2.The beat frequency remains constant as you adjust the tension. 3.The beat frequency gets lower and lower as you adjust the tension. 4.It is not possible to tune the strings to the same fundamental frequency by using the beat frequency that exists between them.
A proton and an alpha particle are moving perpendicular to a uniform magnetic field with the same speeds. If the velocity of the proton is at an angle of 20° with respect to the magnetic field direction, at what angle to the magnetic field direction would the alpha particle be moving if it experiences the same magnitude magnetic force as the proton? The alpha particle has 4 times the mass of the
proton and twice its charge. a. 10° c. 43° b. 62° d. 9.8°
For a healthy adult, the largest percentage of daily water output is attributed to
a. feces. b. lung respiration. c. urine. d. perspiration.