Kepler's third law of planetary motion is also known as the ______________ law.
a. periodic
b. elliptical path
c. harmonic
d. heliocentric
[Ques. 2] The intensity of a 80-dB whistle is quadrupled. What is the new decibel level?
a. 80 dB
b. 68 dB
c. 89 dB
d. 320 dB
[Ques. 3] What wavelength (in m) is associated with the Paschen series for n = 4? (RH = 1.097 107 m1)
a. 320
b. 530
c. 2.7
d. 1.9
e. 0.5
[Ques. 4] The name given to the point of a planet's orbit that is farthest from the Sun is
a. aphelion.
b. focus.
c. perihelion.
d. solstice.
[Ques. 5] The intensity of a 50-dB whistle is doubled. What is the new decibel level?
a. 50 dB
b. 47 dB
c. 53 dB
d. 100 dB
[Ques. 6] What value of wavelength is associated with the Lyman series for n = 2? (RH = 1.097 107 m1)
a. 8.2 106 m
b. 1.2 107 m
c. 2.7 106 m
d. 3.6 107 m
e. 8.8 107 m
[Ques. 7] The name given to the point of a planet's orbit that is closest to the Sun is
a. aphelion.
b. focus.
c. perihelion.
d. solstice.
[Ques. 8] A sound level of 19 dB is how many times as intense as one of 10 dB?
a. 8
b. 9
c. 3
d. 18
[Ques. 9] An energy of 13.6 eV is needed to ionize an electron from the ground state of a hydrogen atom. Selecting the longest wavelength that will work from the those given below, what wavelength is needed if a photon accomplishes this task?
a. 60 nm
b. 80 nm
c. 70 nm
d. 90 nm
e. 40 nm
[Ques. 10] Kepler's first law states that the orbits of the planets around the Sun are
a. circles.
b. ellipses.
c. all lying in the same plane.
d. none of these.
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