Tag Archives: volume

10-to-minus15

There are many ways to look at 10-15.  This power of ten is: the scale of the atomic nucleus the length in meters of a proton and neutron the weight in kilograms of an E. coli bacterium the pressure in pascals of outer space between stars in the Milky Way the size or volume in [...]

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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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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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  • Countdown to Powers of Ten Day

    • 10/10/10 1476 days ago