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Related Concept Videos

Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
Bonding in Metals02:32

Bonding in Metals

Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”.
Phase Transitions: Sublimation and Deposition02:33

Phase Transitions: Sublimation and Deposition

Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
Vaporization01:18

Vaporization

The physical form of a substance changes by changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. For vaporization to occur, kinetic energy must be greater than the intermolecular forces that keep molecules bonded. The amount of energy needed to vaporize a quantity of liquid at a given pressure and a constant temperature is called the heat of vaporization. When...
Nuclear Fission02:50

Nuclear Fission

Many heavier elements with smaller binding energies per nucleon can decompose into more stable elements that have intermediate mass numbers and larger binding energies per nucleon—that is, mass numbers and binding energies per nucleon that are closer to the “peak” of the binding energy graph near 56. Sometimes neutrons are also produced. This decomposition of a large nucleus into smaller pieces is called fission. The breaking is rather random with the formation of a large number of different...
Phase Changes01:19

Phase Changes

Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...

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Meltdown.

Ian Morrison

    Trustee : the Journal for Hospital Governing Boards
    |November 25, 2011
    PubMed
    Summary
    This summary is machine-generated.

    The economic crisis impacts businesses, governments, and households, with healthcare services also facing significant challenges and disruptions.

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    Area of Science:

    • Health Economics
    • Public Health Policy

    Background:

    • The global economic crisis presents a pervasive threat to all societal sectors.
    • Healthcare systems are intrinsically linked to economic stability and public welfare.

    Purpose of the Study:

    • To analyze the multifaceted impacts of the economic crisis on the healthcare sector.
    • To identify key vulnerabilities and potential consequences for healthcare delivery and access.

    Main Methods:

    • Review of economic indicators and healthcare expenditure data.
    • Analysis of policy documents and governmental responses.
    • Case studies on healthcare systems in affected regions.

    Main Results:

    • Projected reductions in healthcare funding and investment.
    • Increased demand for healthcare services due to economic hardship.
    • Potential for workforce shortages and service disruptions.

    Conclusions:

    • The economic crisis poses a substantial risk to healthcare system sustainability.
    • Proactive policy interventions are crucial to mitigate negative impacts and ensure continued access to care.