Posts Tagged ‘Work’

People Work Here

People Work Here
Crawler Transporter

Image by mocr

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How Satellites Work

Geostationary satellites are positioned one-tenth of the way to the moon (about 36000 km), but how do they stay there? This video shows how satellites stay in orbit.

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How smoke detectors work

Bill takes apart a smoke detector and shows how it uses a radioactive source to generate a tiny current which is disrupted when smoke flows through the sensor. He describes how a special transistor called a MOSFET can be used to detect the tiny current changes.
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Removing the Radiation Source that Makes a Smoke Detector Work

Visit my website at www.junglejoel.com – removing a button of radioactive americium 241 from a .00 smoke detector. It’s an alpha particle source. Please rate and comment, thanks!

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Curiosity at Work on Mars

Curiosity at Work on Mars
curiosity nasa

Image by NASA Goddard Photo and Video
On Saturday, November 26, NASA is scheduled to launch the Mars Science Laboratory (MSL) mission featuring Curiosity, the largest and most advanced rover ever sent to the Red Planet.

The Curiosity rover bristles with multiple cameras and instruments, including Goddard’s Sample Analysis at Mars (SAM) instrument suite. By looking for evidence of water, carbon, and other important building blocks of life in the Martian soil and atmosphere, SAM will help discover whether Mars ever had the potential to support life. Curiosity will be delivered to Gale crater, a 96-mile-wide crater that contains a record of environmental changes in its sedimentary rock, in August 2012.

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This artist’s concept depicts the rover Curiosity, of NASA’s Mars Science Laboratory mission, as it uses its Chemistry and Camera (ChemCam) instrument to investigate the composition of a rock surface. ChemCam fires laser pulses at a target and views the resulting spark with a telescope and spectrometers to identify chemical elements. The laser is actually in an invisible infrared wavelength, but is shown here as visible red light for purposes of illustration.

NASA’s Jet Propulsion Laboratory, a division of the California Institute of Technology, Pasadena, manages the Mars Science Laboratory Project for the NASA Science Mission Directorate, Washington, and designed and built Curiosity.

More information about Curiosity is at mars.jpl.nasa.gov/msl/.

Image Credit: NASA/JPL-Caltech

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NASA Goddard Space Flight Center enables NASA’s mission through four scientific endeavors: Earth Science, Heliophysics, Solar System Exploration, and Astrophysics. Goddard plays a leading role in NASA’s accomplishments by contributing compelling scientific knowledge to advance the Agency’s mission.

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Introduction to Fire Alarms 10 – How Smoke Detectors Work

I’m explaining how fire alarm systems work for new technicians or other employees who deal with these systems. This is my 10th video in a string of many Khan Academy-styled lessons. This video describes how both photoelectric and ionization smoke detectors detect smoke.
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