en.wikipedia.org/wiki/Speed_of_light

The **speed of light** in vacuum, commonly denoted c, is a universal physical
constant important ... miles per second, 7005186000000000000♤186000. miles
per hour, 671 million (7008671000000000000♤6.71×10^{8}). astronomical units
per day ...

www.grc.nasa.gov/WWW/k-12/Numbers/Math/Mathematical_Thinking/how_fast_is_the_speed.htm

A traveler, moving at the **speed of light**, would circum-navigate the equator ...
moving at a ground speed of 500 **mph**, would cross the continental U.S. once in 4
...

www.universetoday.com/38040/speed-of-light-2

Sep 1, 2016 **...** **Light** travels at a constant **speed** of 1,079,252,848.8 (1.07 billion) km per hour.
That works out to 299,792,458 m/s, or about 670,616,629 **mph** ...

www.unitjuggler.com/convert-speed-from-c-to-mph.html

Convert speed units. Easily convert **speed of light** to **miles per hour**, convert c to
**mph** . Many other converters available for free.

www.thoughtco.com/speed-of-light-in-miles-per-hour-609319

Mar 16, 2017 **...** This unit conversion example problem demonstrates how to convert the **speed of**
**light** in meters per second to **miles per hour**.

www.space.com/15830-light-speed.html

May 22, 2012 **...** In **miles per hour**, light speed is, well, a lot: about 670,616,629 **mph**. If you could
travel at the **speed of light**, you could go around the Earth 7.5 ...

www.learnastronomyhq.com/articles/how-fast-is-the-speed-of.html

The **speed of light** is 186,282 miles per second. If you want to compare it to the
speed of a plane then the **speed of light** is 671 million **miles per hour** or 1,080 ...

www.tech-faq.com/what-is-speed-of-light-in-mph.html

Mar 11, 2016 **...** The **speed of light** in **MPH** is 670616629 **mph**, 299792458 meters per second, or
186, 282 miles per second. Light takes approximately one ...

van.physics.illinois.edu/qa/listing.php?id=17242

Jun 2, 2011 **...** Namely, why is the **speed of light** what it is (186,000 miles per second). Does
string theory try to answer this? I've read that physics predicts ...