Transcribed Image Text: A person standing at the bottom of the mountain will say that the mu mesons take 6.40 x 10 s to go

Transcribed Image Text: A person standing at the bottom of the mountain will say that the mu mesons take 6.40 x 10 s to go
from the top of the mountain to the bottom. How much time will they say goes by to the mu
mesons? How many half-lives is this?
с.
0.639 x 106 s, 0.418 half-lives
ou
naz
DOD B
MacBook Pro
esc Transcribed Image Text: Mu mesons are subatomic particles which are created when cosmic rays strike the top of the
atmosphere. The travel downward at 99.5% of the speed of light. Mu meson counters were placed
at the top and bottom of Mt. Washington, which is 6265 feet (1909.6 m) tall. Mu mesons are
unstable particles with a half-life of 1.53 x 106 s.
3.
a.
How long does it take the mu mesons to go from the top to the bottom of the mountain? How many
half-lives is this?
6.40×10 s, 4.18 half-lives
If the counter at the top of the mountain detects 560 mu mesons per second, how many should be
detected after 4 half-lives?
b.
ou
naz
35 per second
MacBook Pro
esc

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