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Break the Tension
Read the Fine Print
Educational Use
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Students learn about and experiment with the concept of surface tension. How can a paper clip "float" on top of water? How can a paper boat be powered by soap in water? How do water striders "walk" on top of water? Why do engineers care about surface tension? Students answer these questions as they investigate surface tension and surfactants.

Subject:
Education
Material Type:
Activity/Lab
Provider:
TeachEngineering
Provider Set:
TeachEngineering
Author:
Denise Carlson
Janet Yowell
Jay Shah
Malinda Schaefer Zarske
Date Added:
10/14/2015
Diurnal variation in the skin microbiome affects accuracy of forensic microbiome matching
Unrestricted Use
CC BY
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This resource is a video abstract of a research paper created by Research Square on behalf of its authors. It provides a synopsis that's easy to understand, and can be used to introduce the topics it covers to students, researchers, and the general public. The video's transcript is also provided in full, with a portion provided below for preview:

"You leave traces on every surface you touch. These traces include parts of your unique skin microbiome, and the comparison of skin and surface microbiota has potential as a forensic tool. To test this concept, a recent study analyzed the metagenome left behind on surfaces by four people. People were matched to their household in 84% of the tests and their neighborhood in only 50% of tests. Matching accuracy decayed over the test period on public surfaces, but not in homes. Time of sample collection affected matching accuracy for both skin (reference) and surface samples (query). This may be driven by diurnal routines influencing microbial dispersal from these public surfaces. Returning home likely normalizes a person’s microbiome via contact with their household microbial reservoir. More research is needed with larger sample sizes and across a diverse range of situations to map out these effects and their mechanisms in more detail..."

The rest of the transcript, along with a link to the research itself, is available on the resource itself.

Subject:
Biology
Life Science
Material Type:
Diagram/Illustration
Reading
Provider:
Research Square
Provider Set:
Video Bytes
Date Added:
10/13/2021
Fluid Dynamics
Conditional Remix & Share Permitted
CC BY-NC-SA
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This class provides students with an introduction to principal concepts and methods of fluid mechanics. Topics covered in the course include pressure, hydrostatics, and buoyancy; open systems and control volume analysis; mass conservation and momentum conservation for moving fluids; viscous fluid flows, flow through pipes; dimensional analysis; boundary layers, and lift and drag on objects. Students will work to formulate the models necessary to study, analyze, and design fluid systems through the application of these concepts, and to develop the problem-solving skills essential to good engineering practice of fluid mechanics in practical applications.

Subject:
Applied Science
Engineering
Oceanography
Physical Science
Material Type:
Full Course
Provider:
MIT
Provider Set:
MIT OpenCourseWare
Author:
Varanasi, Kripa
Date Added:
02/01/2013
Geometric Disciplines and Architecture Skills: Reciprocal Methodologies
Conditional Remix & Share Permitted
CC BY-NC-SA
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0.0 stars

This course is an intensive introduction to architectural design tools and process, and is taught through a series of short exercises. The conceptual basis of each exercise is in the interrogation of the geometric principles that lie at the core of each skill. Skills covered in this course range from techniques of hand drafting, to generation of 3D computer models, physical model-building, sketching, and diagramming. Weekly lectures and pin-ups address the conventions associated with modes of architectural representation and their capacity to convey ideas. This course is tailored and offered only to first-year M.Arch students.

Subject:
Applied Science
Architecture and Design
Arts and Humanities
Material Type:
Full Course
Provider:
MIT
Provider Set:
MIT OpenCourseWare
Author:
Clifford, Brandon
Date Added:
09/01/2012
Molecule Polarity
Unrestricted Use
CC BY
Rating
0.0 stars

Students will predict bond polarity using electron negativity values; indicate polarity with a polar arrow or partial charges; rank bonds in order of polarity; and predict molecular polarity using bond polarity and molecular shape.

Subject:
Chemistry
Physical Science
Material Type:
Simulation
Provider:
University of Colorado Boulder
Provider Set:
PhET Interactive Simulations
Author:
Chris Malley
Emily Moore
Julia Chamberlain
Kathy Perkins
Kelly Lancaster
Robert Parson
Date Added:
09/27/2011