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Moment of Inertia about an Arbitrary Axis01:20

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The moment of inertia is typically associated with principal axes, but it can also be computed for any random axis. When an arbitrary axis is under consideration, the moment of inertia is determined by integrating the mass distribution of the object along that specific axis. It is crucial in applications like the design of machinery, where components rotate about various axes, and balance and stability are essential.
In this scenario, the perpendicular distance between the chosen arbitrary axis...
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Angular Momentum about an Arbitrary Axis01:11

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Imagine a rigid body with a mass denoted as 'm', which has its center of mass at point G and is rotating around an inertial reference frame. The angular momentum at an arbitrary point P can be calculated by taking the cross product of the position vector and linear momentum vector for each individual mass element.
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Kohlberg's Theory of Moral Development01:19

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Kohlberg's theory of moral development uses the Heinz dilemma — a thought experiment in which a man, Heinz, must decide whether to steal an unaffordable drug to save his dying wife — to illustrate the evolution of moral reasoning. This framework, divided into three levels with two stages, highlights how individuals' understanding of right and wrong becomes increasingly complex.
Pre-Conventional Level
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Decision Making01:20

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Decision-making is a fundamental cognitive process that involves evaluating alternatives and selecting among them. This process can range from simple choices, such as deciding what to wear, to complex decisions, like choosing a major in college or a career path. The complexity of the decision often dictates the approach we use, which can be broadly categorized into two types: automatic and controlled decision-making.
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Decision Making: P-value Method01:09

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The process of hypothesis testing based on the P-value method includes calculating the P- value using the sample data and interpreting it.
First, a specific claim about the population parameter is proposed. The claim is based on the research question and is stated in a simple form. Further, an opposing statement to the claim  is also stated. These statements can act as null and alternative hypotheses:  a null hypothesis would be a neutral statement while the alternative hypothesis can...
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Bioavailability refers to the extent and rate at which a drug reaches systemic circulation in its active form. Extent refers to the amount of the drug that makes it into circulation, while rate is the speed at which it enters circulation. It is influenced by several factors critical for optimizing drug formulations, dosing regimens, and therapeutic outcomes.Physicochemical properties of drugs and formulationsThe solubility, stability, and dissolution rate of a drug significantly impact its...
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Related Experiment Video

Updated: Jan 27, 2026

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates
08:07

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

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Even arbitrary norms influence moral decision-making.

Campbell Pryor1, Amy Perfors1, Piers D L Howe2

  • 1School of Psychological Sciences, University of Melbourne, Melbourne, Victoria, Australia.

Nature Human Behaviour
|April 2, 2019
PubMed
Summary
This summary is machine-generated.

People conform to social norms, even arbitrary ones, because group self-identity is a key driver. This descriptive norm effect highlights the importance of belonging in behavior.

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Area of Science:

  • Social Psychology
  • Behavioral Economics
  • Sociology

Background:

  • The descriptive norm effect describes the tendency for individuals to imitate common behaviors.
  • This phenomenon is utilized to promote prosocial behaviors, such as organ donation.
  • The underlying psychological mechanisms driving norm adherence remain incompletely understood.

Purpose of the Study:

  • To investigate the psychological drivers of conformity to social norms, particularly arbitrary ones.
  • To determine if self-identity influences adherence to descriptive norms.
  • To evaluate existing theories of norm adherence against empirical findings.

Main Methods:

  • Participants were exposed to arbitrary social norms across various contexts.
  • Conformity levels were measured while controlling for potential confounds like anchoring and mere-exposure effects.
  • The relationship between self-identification with the norm-exhibiting group and conformity was analyzed.

Main Results:

  • Individuals conform to social norms even when aware they are arbitrary and do not reflect genuine preferences.
  • Conformity to arbitrary norms is significantly predicted by the degree of self-identification with the relevant social group.
  • Established explanations (informational and social sanction accounts) do not fully account for the observed conformity patterns.

Conclusions:

  • Self-identity plays a crucial role in the adherence to descriptive social norms.
  • Existing theories of norm adherence require augmentation to incorporate the influence of self-identity.
  • Understanding the role of self-identity can refine interventions aimed at leveraging social norms for prosocial outcomes.