Question 1
Because of Heisenberg's Uncertainty Principle, the velocity of a particle is known least precisely when the length of the wave packet representing the particle is
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< 10−15 m.
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< 10−10 m.
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of the order of 1.00 m.
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>10 m.
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the length of a plane wave (infinite)
Question 2
Because the factor h on the right side of the Heisenberg uncertainty principle has units of Joule-seconds, it suggests that the energy of a system also has uncertainty. The uncertainty in energy depends on the length of the time interval during which a system exists. ΔEΔt≥h/4π. Suppose an unstable mass is produced during a high-energy collision such that the uncertainty in its mass is me/100. (me = 9.11 × 10−31 kg.) How long will this particle exist?
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6.4 × 10−20 s
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2.3 × 10−23 s
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1.0 × 1015 s
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1.2 × 1013 s
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8.1 × 10−19 s
IgM pentamer of immunoglobulin units
Side view of the cranium and facial bones.
How to factor a perfect square trinomial
Stretching the hip flexors with the recipient side-lying.
Gestalt Principle: Closure
Gestalt Principle: Continuity