13. An electron possessing the kinetic energy E approaches a potential barrier of the heightU = 2E and tunnels through it. What is the kinetic energy energy of the electron afterwards? %3|
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A: The tension in the rope T=mg-N =75.0 kg×9.81 ms2-500 N =236 N
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Q: mil n m2
A: m1 = 5 kg m2 = 7 kg
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A: mass of box = 54 kg speed = 25 m/sa = 5.6 m/s2
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A: Net force is equal to the difference between applid force minus force due to friction.
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