Tag Archives: mass

Determining an Exoplanet

Check out this recent report from NASA on an exoplanet named Fomalhaut b, which orbits a 200-million-year-old star [10+08] called Fomalhaut, every 872 years [10+02]: “A second look at data from NASA’s Hubble Space Telescope is reanimating the claim that the nearby star Fomalhaut hosts a massive exoplanet. The study suggests that the planet, named [...]

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Black Spidery things on Mars

Radiolab Blogland recently posted the piece below titled “Krulwich Wonders: Are Those Spidery Black Things on Mars Dangerous? (Maybe).” Read on! “You are 200 miles directly above the Martian surface—looking down. This image was taken by the Mars Reconnaissance Orbiter on Jan. 27, 2010. (The color was added later.) What do we see? Well, sand, mostly [...]

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The Smell of Fear

It turns out that the smell of fear is real.  A recent article in The New York Times addresses a new study on how the smell of fear effects “family dynamics behavior in Eurasian Rollers–spectacular Jay-sized birds…”  What scientists discovered only reinforces the growing evidence that animals–humans included–can smell each others’ fear.  The odor (which [...]

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Sizing up the Moon

Universe Today offers a few fascinating ways to consider the size of the moon: “The volume of the Moon is 2.195 x 1010 km3 [almost 22 billion km3]. That sounds like a huge number, but it’s actually only 2% the volume of the Earth.  In other words, you could fit 50 moons inside the volume [...]

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10-to-minus12

We can consider the power 10-12 from multiple perspectives.  A few of many examples are listed below: Mass of an average human cell (10-12 Kg) Lowest pressure obtained in laboratory conditions (10-12 pascals) Surface area of an E. coli bacterium (6×10-12 m2) Kinetic energy of a D-T fusion neutron (2.26×10-12 joules) Wavelength of gamma rays [...]

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6 (.0221415)

Avogadro’s Number is 6.0221415 X 1023 which is also quantified as N A. “Avogadro’s number, N A , is the fundamental physical constant that links the macroscopic physical world of objects that we can see and feel with the submicroscopic, invisible world of atoms. In theory, N A specifies the exact number of atoms in [...]

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7 (International System of Units [SI] base units)

The International System of Units (SI) is founded on seven SI base units for seven base quantities assumed to be mutually independent, as given in Table 1. Here is the SI list from the NIST reference on Constants, Units and Uncertainty. Table 1.  SI base units SI base unit Base quantity Name Symbol length meter [...]

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9 (.10956)

Electron rest mass from Table of Physical constants “The electron rest mass, symbolized m e , is the mass of an electron as measured when its speed is zero relative to an observer. The electron has extremely small mass  – it’s almost 2000 times less massive than the proton — at approximately 9.10956 x 10 [...]

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  • Countdown to Powers of Ten Day

    • 10/10/10 1471 days ago