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Thus,
()
( )
38
1
39
2
2 1.2 10 m
30m
7.2 10
bL
−
=×
=
×
.
One can see that
2
bL
Te
−
≈
is very small (essentially zero).
80. The kinetic energy of the car of mass
m
moving at speed
v
is given by
Em
v
=
1
2
2
,
while the potential barrier it has to tunnel through is
U
b
= mgh
, where
h
= 24 m.
According to Eq. 3821 and 3822 the tunneling probability is given by
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 Spring '08
 Any
 Physics, Energy, Kinetic Energy, Mass

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