Fundamental difference between classical and quantum mechanics

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Classical mechanics is based on deterministic laws governing macroscopic objects, while quantum mechanics introduces probabilistic behavior at the atomic and subatomic levels. Key differences include the concept of superposition in quantum mechanics, where particles can exist in multiple states simultaneously, contrasting with classical mechanics' definite states. Additionally, quantum mechanics incorporates wave-particle duality, illustrating that particles exhibit both wave-like and particle-like properties. The role of observation is also crucial in quantum mechanics, affecting the state of a system, unlike in classical mechanics. Understanding these distinctions is essential for grasping the foundational principles of modern physics.
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What are some of the fundamental differences between Classical & Quantum mechanics?
 
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peps said:
What are some of the fundamental differences between Classical & Quantum mechanics?

maybe if classical is an old computer or a car then quantum mechanics would be a new computer or an airplane?
 
I think it is like the difference between classical (ie - Newtonian) physics and quantum physics. Something about Max Planck, and as always, there is a http://en.wikipedia.org/wiki/Quantum_mechanics" about this stuff.
 
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Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
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