The Galilean moon of most interest to exobiologists is
A) Ganymede. B) Europa. C) Io. D) Amalthea. E) Callisto.
B
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A magnifying lens with a focal length of 10 cm has what maximum magnification? (Assume the near point is 25 cm). Do not use the approximation formula
a. 3.5 c. 7.1 b. 2.5 d. 3.0
Copernicus's model of the solar system gave much better predictions than the model of Ptolemy
Indicate whether the statement is true or false
While standing at a crosswalk, you hear a frequency of 600 Hz from an approaching police car. After the police car passes, its frequency is 400 Hz. What is the speed of the police car? (speed of sound = 340 m/s)
a. 34.0 m/s b. 60.0 m/s c. 66.3 m/s d. 68.0 m/s e. 199 m/s
Rutherford's scattering equation question
Scattering one unknown particle of Z1 off of another, much more massive target particle of Z2, you observe a certain number of particles scattered at an angle
(your detector is of width 
, at an angle
from the beam axis, centered at an angle 
around the beam axis). Use Rutherford's scattering equation (and assumptions) to determine which of the following changes to the experiment would be most likely to increase the number of particles you detect with your detector.
increase the velocity of the scattering particles.
a. increase the angle around the beam axis.
b. increase the cross section of the target nuclei.
c. increase the number of neutrons in the scattering nuclei.
d. increase the number of electrons in the target nuclei.