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Related Concept Videos

Vapor Pressure02:34

Vapor Pressure

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When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules move randomly about, they will occasionally collide with the surface of the condensed phase, and in some cases, these collisions will result in the molecules re-entering the condensed phase. The change from the gas phase to the liquid is called condensation. When the rate of condensation becomes equal to the rate of vaporization, neither the amount of the liquid nor the amount of the vapor...
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Gas pressure is caused by force exerted by gas molecules colliding with the surfaces of objects. Although the force of each collision is very small, any surface of an appreciable area experiences a large number of collisions in a short time, which can result in high pressure.
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Calorimetry is a technique used to measure the amount of heat involved in a chemical or physical process or to measure the heat transferred to or from a substance. The heat is exchanged with a calibrated and insulated device called the calorimeter. Calorimetry experiments are based on the assumption that there is no heat exchange between the insulated calorimeter and the external environment. The well-insulated calorimeters prevent the transfer of heat between the calorimeter and its external...
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Vapor Pressure Lowering03:28

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The equilibrium vapor pressure of a liquid is the pressure exerted by its gaseous phase when vaporization and condensation are occurring at equal rates:
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Pressure Gauges01:20

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Most pressure gauges, like those on scuba tanks, are calibrated to read zero at atmospheric pressure. Readings from such gauges are called the gauge pressure, which is the pressure relative to atmospheric pressure. When the pressure inside the tank exceeds atmospheric pressure, the gauge reports a positive value. Some gauges are designed to measure negative pressure. For example, many physics experiments must take place in a vacuum chamber, a rigid chamber from which some of the air is pumped...
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Pressure of Fluids01:14

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There are many examples of pressure in fluids in everyday life, such as in relation to blood (high or low blood pressure) and in relation to weather (high- and low-pressure weather systems). A given force can have a significantly different effect, depending on the area over which the force is exerted. For instance, a force applied to an area of 1 mm2 has a pressure that is 100 times greater than the same force applied to an area of 1 cm2. That's why a sharp needle is able to poke through...
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Under funding pressure.

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    Declining health funding, as a percentage of gross domestic product, is negatively impacting healthcare professionals. This sustained reduction in financial resources strains the health system and its workforce.

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    Area of Science:

    • Public Health
    • Health Economics

    Background:

    • Analysis of long-term trends in national health expenditure as a proportion of Gross Domestic Product (GDP).
    • Examination of the correlation between reduced health funding and workforce strain.

    Discussion:

    • The consistent decrease in health funding relative to economic output poses significant challenges.
    • The impact on healthcare professionals includes increased workload and potential burnout.

    Key Insights:

    • Shrinking health budgets directly correlate with adverse effects on the healthcare workforce.
    • The proportion of GDP allocated to health services is a critical indicator of system sustainability.

    Outlook:

    • Urgent policy interventions are needed to address the funding gap.
    • Future research should quantify the long-term consequences for patient care and health outcomes.