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pogonyaev
3 years ago
11

Alpha particles consist of two protons and two neutrons bound together into a particle identical to a helium nucleus. They have

much less energy than either beta particles of gamma waves. Suppose a Geiger counter was placed 10 cm from an alpha emitter, and clicks were recorded for three minutes.
A) 0 clicks
B) 2 clicks
C) 5 clicks
D) 10 clicks
Physics
2 answers:
vovangra [49]3 years ago
6 0
I'm not so sure if it is 5 clicks or 0 clicks
Andreas93 [3]3 years ago
5 0

Answer:

0 clicks would be detected on the far side of the aluminum shield. Alpha particles are not very penetrating. Paper, clothing or a few centimeters of air can effectively shield against alpha particles. However, if ingested or inhaled, alpha particles can be hazardous.

Explanation:

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An object moves uniformly around a circular path of radius 19.0 cm, making one complete revolution every 2.40 s.
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Answer:

v = 0.5 m/s

f = 0.42 Hz

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Explanation:

  • By definition, the translational speed is the rate of change of the position with respect to time.
  • The change in position along a complete revolution is just the following:
  • Δs = 2*π*r = 2*π*0.19 m = 1.19 m
  • The time needed to complete a revolution is 2.4 s, so the translational speed can be written as follows:

        v =\frac{\Delta s}{\Delta t} = \frac{1.19m}{2.4s} = 0.5 m/s (1)

  • The frequency in Hz is just the inverse of the time needed to complete a revolution (known as the period T), as follows:
  • f = 1/T = 1/2.4s = 0.42 Hz (2)
  • Finally, the angular speed is the rate of change of the angle rotated with respect to time, as follows:

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