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Related Concept Videos

Unusual Results01:16

Unusual Results

3.0K
Unusual results are those that have a very low chance of occurring. Unusual results can be identified using probabilities and the range rule of thumb. In problems involving probability, unusual results can be observed in 2 instances – an unusually high number of successes or an unusually low number of successes.
According to the range rule of thumb, any value above or below two standard deviations, 2σ  from the mean, μ  is considered unusual.
Maximum unusual value =...
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Angle of Twist: Problem Solving01:13

Angle of Twist: Problem Solving

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An electric motor applies a torque of 700 N·m to an aluminum shaft, triggering a stable rotation. Two pulleys, B and C, are subjected to torques of 300 N·m and 400 N·m, respectively. The modulus of rigidity is provided as 25 GPa. With the knowledge of the length and diameter of each segment, the twist angle between the two pulleys can be computed. First, a section cut is made between pulleys B and C, and the cut cross-section is analyzed using a free-body diagram. Given that the...
870
Angle of Twist - Elastic Range01:13

Angle of Twist - Elastic Range

923
Consider a cylindrical shaft with a length denoted by L and a consistent cross-sectional radius referred to as r. This shaft undergoes a torque at the free end. The highest shearing strain within the shaft is directly proportional to the twist angle and the radial distance from the shaft axis. When the shaft behaves elastically, this shearing strain can be articulated using variables such as the applied torque, radial distance, the polar moment of inertia, and the modulus of rigidity. By...
923
Spontaneity02:21

Spontaneity

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A spontaneous process is one that occurs naturally under certain conditions. A nonspontaneous process, on the other hand, will not take place unless it is “driven” by the continual input of energy from an external source. Processes have a natural tendency to occur in one direction under a given set of conditions. Water will naturally flow downhill (spontaneous process), but uphill flow (nonspontaneous process) requires outside intervention such as the use of a pump. Iron exposed to...
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Unsymmetric Bending01:18

Unsymmetric Bending

987
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from those in symmetrical bending, and are essential for designing structures to withstand different loading conditions. In unsymmetrical bending, the neutral axis—where stress is zero—does not necessarily align with the geometric axes of the cross-section. The...
987
Bending01:10

Bending

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Pure bending is a fundamental concept in structural mechanics, essential for understanding how materials deform under symmetrical loads without direct forces. Pure bending occurs when prismatic members, such as beams, are subjected to equal and opposite moments that induce bending. The phenomenon is crucial as it allows for predicting stress distributions without the influence of axial or shear forces.
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Related Experiment Video

Updated: May 1, 2026

Magnetic Tweezers for the Measurement of Twist and Torque
11:41

Magnetic Tweezers for the Measurement of Twist and Torque

Published on: May 19, 2014

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A surprising twist.

Nikta Fakhri1, Christoph F Schmidt

  • 1Nikta Fakhri is in the Faculty for Physics-Third Institute of Physics-Biophysics, Georg August University, Göttingen, Germany.

Elife
|April 10, 2014
PubMed
Summary
This summary is machine-generated.

X-ray crystallography identified a unique structural feature in kinesin-5 motor proteins. This finding offers new insights into the mechanics of these essential cellular components.

Keywords:
coiled-coilkinesin-5microtubulemitosismotor proteinsx-ray structure

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Area of Science:

  • Structural biology
  • Molecular motors
  • Cellular mechanics

Background:

  • Kinesin-5 motor proteins are crucial for cell division and intracellular transport.
  • Understanding their structure is key to elucidating their function.

Purpose of the Study:

  • To investigate the detailed structure of kinesin-5 motor proteins.
  • To identify and characterize any unusual structural elements.

Main Methods:

  • X-ray crystallography was employed to determine the high-resolution structure.
  • Structural analysis was performed to identify novel features.

Main Results:

  • An unusual structural element was discovered within the kinesin-5 motor protein.
  • This element's precise nature and implications are detailed.

Conclusions:

  • The identified structural element represents a novel finding in kinesin-5 motor proteins.
  • This discovery may impact our understanding of motor protein function and regulation.