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GaryK [48]
2 years ago
8

Determine whether each object has potential energy, kinetic energy, or both

Physics
1 answer:
Pepsi [2]2 years ago
4 0

Answer:

  1. stretched spring has potential energy
  2. a falling skydiver has kinetic energy
  3. a gallob of gasoline has potential energy
  4. rotating flywheel in a car in a car engine has kinetic energy
  5. a swinging wrecking ball has kinetic energy
  6. skier on a mountaintop has both

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The muzzle velocity of a rifle bullet is 800. m⋅ s −1 m⋅s−1 along the direction of motion. If the bullet weighs 27.0 g g , and t
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Answer:

1.98 × 10⁻³³m

Explanation:

It is given that,

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p=mvp=0.027\times 800 = 21.6\ kg-m/s

Uncertainty in momentum is,

\Delta p=0.2\%\ of\  21.6\\\Delta p=0.0432

We need to find the uncertainty in position. It can be calculated using Heisenberg uncertainty principal as :

\Delta p.\Delta x\geq \dfrac{h}{4\pi}\Delta x=\dfrac{h}{4\pi \Delta p}\Delta x=\dfrac{6.62\times 10^{-34}}{4\pi \times 0.0432}\Delta x=1.98\times 10^{-33}\ m

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