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macroscopic    
a. 肉眼可见的

肉眼可见的

macroscopic
巨观

macroscopic
adj 1: visible to the naked eye; using the naked eye [synonym:
{macroscopic}, {macroscopical}]
2: large enough to be visible with the naked eye [synonym:
{macroscopic}, {macroscopical}]

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  • Heisenberg Uncertainty Principle and macroscopic objects
    The Heisenberg Uncertainty Principle (HUP) is applicable to macroscopic objects, such as a football, despite their composition of numerous particles The discussion highlights the potential to demonstrate this applicability through statistical methods based on elementary particle behavior or by extending the principle from commutation relations between momentum and position The de Broglie
  • Practical cosmic speed limit for macroscopic objects?
    The discussion revolves around the upper limits of velocity for macroscopic objects, particularly focusing on the potential speeds achievable through natural processes and theoretical models Participants explore various mechanisms, including gravitational slingshots and advanced technological methods, to accelerate objects to relativistic speeds
  • Understanding the Uncertainty Principle: Microscopic vs. Macroscopic . . .
    Click For Summary The discussion revolves around the Heisenberg Uncertainty Principle, exploring its implications at both microscopic (quantum) and macroscopic (classical) levels Participants seek examples that illustrate the principle's effects in different contexts, comparing classical mechanics with quantum mechanics
  • What is Macroscopic Quantization and How Does it Affect Everyday . . .
    Macroscopic quantization refers to the subtle effects of quantum mechanics that, while not immediately observable, influence the stability of macroscopic bodies such as baseballs and humans Key phenomena include superconductivity and superfluidity, which arise from quantized energy levels in macroscopic systems, particularly at low temperatures
  • Nuclear Macroscopic cross-section - Physics Forums
    The discussion revolves around the concept of macroscopic cross-sections in nuclear engineering, specifically addressing a problem from "Introduction to Nuclear Engineering" by Lamarsh Participants are exploring the relationship between the number densities of constituents in a mixture and their respective normal densities, as well as how these relate to the macroscopic absorption cross
  • Microscopic and macroscopic physics
    The discussion centers on the distinction between quantum mechanics and classical physics, specifically regarding their applicability to microscopic and macroscopic phenomena Quantum mechanics operates on a microscopic scale where probability governs measurements, while classical physics describes macroscopic events with definitive outcomes
  • Molecular-level explanation of macroscopic phenomena: dissolving
    The discussion revolves around the molecular-level explanation of the process of dissolving sugar in water and the subsequent recrystallization of sugar upon boiling the solution Participants explore the interactions between sucrose molecules and water, as well as the physical changes that occur during dissolution and evaporation One participant describes the macroscopic appearance of sugar
  • Calculation of neutron transport cross section - Physics Forums
    Another participant provides a formula for macroscopic transport cross section and mentions specific values of 1-cos (theta) for water and heavy water A different participant questions the origin of the provided values of 1-cos (theta) and reports obtaining significantly different transport cross section values when applying them
  • The difference between microscopic and macroscopic cross sections . . .
    This discussion focuses on the comparison of microscopic and macroscopic cross sections, specifically for the elements B, Cd, Gd, and Hf relative to the fission cross section of U-235 Microscopic cross sections (σ) are measured in barns, representing the effective area for nuclear reactions, while macroscopic cross sections (Σ) are calculated using the formula Σ = N σ, where N is the
  • How Does Friction Occur If Atoms Never Truly Touch?
    The discussion reflects limitations in current understanding of friction, including the dependence on phenomenological models and the unresolved nature of atomic interactions at the macroscopic scale





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