When a system is being driven at a natural frequency, it is said to be driven in ______________.
Fill in the blank(s) with correct word
[Ques. 2] The threshold wavelength for photoelectric emission of a particular substance is 500 nm. What is the work function (in eV)?
a. 4.2
b. 4.0 1019
c. 4.0 1010
d. 2.5 1019
e. 2.5
[Ques. 3] Which of the following is believed to have played a major role in the condensation process predicted by the condensation theory?
a. Dust
b. Temperature
c. Retrograde motion
d. Protosuns
[Ques. 4] For a standing wave in a rope or string, the points that remain stationary are called ______________.
Fill in the blank(s) with correct word
[Ques. 5] Your temperature is 98.6F. Assuming your skin is a perfect radiator ( = 1), determine the wavelength corresponding to the largest intensity (in m).
a. 8.0
b. 9.3
c. 3.0
d. 5.7
e. 29.4
[Ques. 6] At present, the formation of the solar system is believed by most astronomers to have begun with a large, swirling volume of cold gas and dust called the ______________ nebula.
a. condensation
b. primordial
c. accretion
d. celestial
[Ques. 7] As a truck moves away from a person with its horn blowing, the person hears a frequency ______________ than that of the horn.
Fill in the blank(s) with correct word
[Ques. 8] If the interaction of a particle with its environment restricts the particle to a finite region of space, the result is the quantization of ____ of the particle.
a. the momentum
b. the energy
c. the velocity
d. all of the above properties
e. only properties (a) and (b)
[Ques. 9] The flattened, rotating disk of gas and dust around the protosun, from which planets were believed to have formed, is called the
a. solar nebula.
b. planetary nebula.
c. condensation nebula.
d. primordial nebula.
[Ques. 10] An observer moving toward a stationary sound source hears a(n) ______________ in frequency.
Fill in the blank(s) with correct word
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