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United States of America

11705 projects whose affiliated fair was here, most recently in 2026.

States and provinces

ISEF records a state or province for some finalists and not others, so these counts do not add up to the country total.

Projects

11705 projects · showing 7921–7950

ISEF · 2018

The Napkin Ring Paradox

Mathematics

The Merriam-Webster dictionary defines a paradox as a "statement that is seemingly contradictory or opposed to common sense and is yet perhaps true." Can napkin rings from spheres of differe…

ISEF · 2018

The Optimal Truss

Engineering Mechanics

Purpose: Design and build a truss that has the highest ratio of stability to cost. Procedure: 1.Sketch a design for the diamond truss on a sheet of isometric graph paper. 2.Transcribe the sk…

ISEF · 2018

The Response of Field Effect Transistors

Physics and Astronomy

There is a well known gadget in field of electronics where a Junction Field Effect Transistor (JFET) moderates the flow of current to an LED by responding to an external electric field. The…

ISEF · 2018

Time of the Month: Bad for the Environment?

Environmental Engineering

Women in India and Africa ultimately do not have the necessary resources for women hygienic routines. Also, the forming problem of TSS in the environment is affecting the lives of many peopl…

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