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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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Related Experiment Video

Updated: Dec 10, 2025

Indirect Fabrication of Lattice Metals with Thin Sections Using Centrifugal Casting
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Worth Its Weight in Gold.

Thomas W Elwood1

  • 1Association of Schools Advancing Health Professions, Washington, DC 20001, USA. thomas@asahp.org.

Journal of Allied Health
|September 3, 2020
PubMed
Summary
This summary is machine-generated.

Scientific articles vary in impact, with some achieving lasting fame and others contributing incrementally to knowledge. Evaluating the long-term significance of research publications is crucial for scientific progress.

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Area of Science:

  • Bibliometrics and scientific communication.
  • Analysis of scholarly publication impact.

Background:

  • Scholarly articles exhibit diverse trajectories of influence and recognition.
  • Some publications achieve enduring significance, while others have transient impact.

Discussion:

  • The value of a scientific paper can be likened to its weight in gold, signifying substantial contribution.
  • Authorial fame from certain manuscripts can increase over time, indicating lasting impact.

Key Insights:

  • Research papers can be categorized by their impact: timeless classics, fleetingly brilliant, or incremental contributions.
  • A significant portion of published work adds foundational knowledge, akin to adding a brick to a structure.

Outlook:

  • Understanding publication impact aids in identifying seminal works and tracking scientific advancement.
  • Future bibliometric studies can refine metrics for assessing the long-term value of scientific literature.