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Related Concept Videos

Hypothesis: Accept or Fail to Reject?01:17

Hypothesis: Accept or Fail to Reject?

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The outcome of any hypothesis testing leads to rejecting or not rejecting the null hypothesis. This decision is taken based on the analysis of the data, an appropriate test statistic, an appropriate confidence level, the critical values, and P-values. However, when the evidence suggests that the null hypothesis cannot be rejected, is it right to say, 'Accept' the null hypothesis?
There are two ways to indicate that the null hypothesis is not rejected. 'Accept' the null...
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Hearing01:31

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When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
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Bronsted-Lowry Acids and Bases02:58

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The acid-base reaction class has been studied for quite some time. In 1680, Robert Boyle reported traits of acid solutions that included their ability to dissolve many substances, to change the colors of certain natural dyes, and to lose these traits after coming in contact with alkali (base) solutions. In the eighteenth century, it was recognized that acids have a sour taste, react with limestone to liberate a gaseous substance (now known to be CO2), and interact with alkalis to form neutral...
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Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
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Lewis Acids and Bases02:33

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In 1923, G. N. Lewis proposed a generalized definition of acid-base behavior in which acids and bases are identified by their ability to accept or to donate a pair of electrons and form a coordinate covalent bond.
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
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Water: A Bronsted-Lowry Acid and Base02:30

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The reaction between a Brønsted-Lowry acid and water is called acid ionization. For example, when hydrogen fluoride dissolves in water and ionizes, protons are transferred from hydrogen fluoride molecules to water molecules, yielding hydronium ions and fluoride ions:
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Related Experiment Video

Updated: Jan 27, 2026

Ultrasound Images of the Tongue: A Tutorial for Assessment and Remediation of Speech Sound Errors
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CFHA Don Bloch Award acceptance speech, 2018.

John S Rolland1

  • 1Chicago Center for Family Health.

Families, Systems & Health : the Journal of Collaborative Family Healthcare
|March 29, 2019
PubMed
Summary

John S. Rolland received the 2018 CFHA Don Bloch Award. This award recognizes significant contributions to the field of family health. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

Area of Science:

  • Family Health
  • Health Services Research

Background:

  • The abstract details John S. Rolland's acceptance speech for the 2018 CFHA Don Bloch Award.
  • This award acknowledges outstanding achievements in family health.

Discussion:

  • The speech likely highlighted key advancements and future directions in family health.
  • It may have emphasized the importance of interdisciplinary approaches in healthcare.

Key Insights:

  • Recognition of John S. Rolland's impact on family health.
  • The award signifies excellence in the field of family health research and practice.

Outlook:

  • Continued innovation in family health services.
  • Future research will build upon the foundations laid by award recipients.

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