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Related Concept Videos

Mass and Weight01:19

Mass and Weight

15.9K
Mass and weight are often used interchangeably in everyday conversation. For example,  medical records often show our weight in kilograms, but never in the correct units of newtons. In physics, however, there is an important distinction. Weight is the pull of the Earth on an object. It depends on the distance from the center of the Earth. Weight dramatically varies if we leave the Earth's surface, unlike mass, which does not vary with location. On the Moon, for example, the...
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Weightlessness01:01

Weightlessness

7.1K
When an object is dropped, it accelerates toward the center of the Earth. If the net external force on the object is its weight, it is said to be in free fall; that is, the only force acting on the object is gravity. Galileo was instrumental in showing that, in the absence of air resistance, all objects fall with the same acceleration g. However, when objects on the Earth fall downward, they are never truly in free fall, because there is always some upward resistance force from the air acting...
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Apparent Weight01:09

Apparent Weight

10.0K
True weight is the measure of the gravitational force acting on an object. However, if the object accelerates, its measured weight is different from its true weight. Similar observations can be made when the object is submerged in water. An object's weight in water is its apparent weight, which is equal to the difference between its true weight and the buoyant forces.
Consider a person standing on a bathroom scale inside an elevator. If the scale is accurate at rest, its reading equals the...
10.0K
Weighted Mean00:57

Weighted Mean

7.0K
While taking the arithmetic, geometric, or harmonic mean of a sample data set, equal importance is assigned to all the data points. However, all the values may not always be equally important in some data sets. An intrinsic bias might make it more important to give more weightage to specific values over others.
For example, consider the number of goals scored in the matches of a tournament. While computing the average number of goals scored in the tournament, it may be more important to...
7.0K
Apparent Weight and the Earth's Rotation01:28

Apparent Weight and the Earth's Rotation

4.1K
Since all objects on the Earth's surface move through a circle every 24 hours, there must be a net centripetal force on each object, directed towards the center of that circle. The points of the north and south poles are the only exception to this rule.
For an object on the Earth's equator, the net centripetal force that accounts for its rotation is the Earth's pull towards its center, or the weight minus the normal force that prevents it from piercing into the Earth's surface....
4.1K
Atomic Weight01:25

Atomic Weight

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Protons and neutrons have approximately the same mass, about 1.67 × 10-24 grams. Scientists arbitrarily define this amount of mass as one atomic mass unit (amu) or one Dalton. Electrons are much smaller in mass than protons, weighing only 9.11 × 10-28 grams, or about 1/1800 of an atomic mass unit. As a result, they do not contribute much to an element's overall atomic mass. This means that, when considering atomic mass, it is customary to ignore the mass of any electrons and...
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Author Spotlight: Methodologies and Advancements of Chronic Pain Management Research
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Let's talk about your weight….

Andrew Cole

    Nursing Standard (Royal College of Nursing (Great Britain) : 1987)
    |June 22, 2017
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    Summary
    This summary is machine-generated.

    A growing number of nurses in the United Kingdom are overweight or obese. This public health issue requires attention within the nursing profession to address rising rates of obesity.

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    Area of Science:

    • Public Health
    • Occupational Health
    • Nursing Studies

    Background:

    • A significant proportion of nurses in the UK are classified as overweight or obese.
    • The prevalence of overweight and obesity within the nursing workforce is increasing.
    • This trend poses potential risks to both individual nurses and patient care.

    Purpose of the Study:

    • To highlight the escalating issue of overweight and obesity among UK nurses.
    • To underscore the growing public health concern within this essential profession.

    Main Methods:

    • This study is based on observational data and literature review.
    • Analysis of current health statistics pertaining to the UK nursing population.

    Main Results:

    • A substantial percentage of nurses in the UK are overweight or obese.
    • The rate of overweight and obesity among nurses is on an upward trajectory.

    Conclusions:

    • The increasing prevalence of overweight and obesity among UK nurses is a significant and growing concern.
    • Further research and targeted interventions are warranted to address this health challenge in the nursing profession.