In many cartoon shows, a character runs off a cliff, realizes his predicament, and lets out a scream. He continues to scream as he falls
If the physical situation is portrayed correctly, from the vantage point of an observer at the top of the cliff leaning over the edge, the pitch of the scream as he falls should be
A) lower than the original pitch and constant.
B) higher than the original pitch and increasing as he falls.
C) higher than the original pitch and constant.
D) lower than the original pitch and decreasing as he falls.
E) It is impossible to predict.
D
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Determine the values of (hkl), the interplanar spacing (dhkl), and the angles of diffraction (?) for the first eight peaks for BCC iron with a lattice parameter of 0.287 nm, when using molybdenum K? radiation with a wavelength of 0.0711 nm.
What will be an ideal response?
A hydrogen atom consists of a single proton and a single electron. If the distance between the proton and the electron were doubled, the electric force would be
1) 1/4 as much, 2) 1/2 as much, 3) twice as much, 4) not enough information to say, and if instead the distance between the electron and proton were halved, the electric force would be 5) 1/4 as much. 6) 1/2 as much. 7) twice as much. 8) four times as much. 9) not enough information to say
In Ptolemy's view of the universe, a planet moves on an epicycle whose center moves around the Earth on the deferent circle
a. Correct b. FALSE; Ptolemy put the Sun at the center. c. FALSE; The planet stays on the deferent circle. d. FALSE; The Earth is at the center of the epicycle. e. FALSE; Both c and d are correct.
A bound quark-antiquark pair is a ________ while a bound quark triplet is a ________.
A. beta particle; proton B. neutron; meson C. meson; baryon D. baryon; meson E. neutrino; antineutrino