This is a test, and I believe it only works in Firefox correctly after intalling this program: http://www.dessci.com/en/products/mathplayer/

A satellite is orbiting around the earth at a height of 20,000 km. What is its orbital speed?

[mathml]R_(earth) = 6.378*10^8 cm[/mathml]

[mathml]M_(earth) = 5.974*10^27 g[/mathml]

[mathml]G_(const) = 6.67259*10^(-8) cm^3/(g*s^2)[/mathml]

[mathml]v_(orbit) = G_(const) * M_(earth) / (R_(earth) + R_(satellite)) = 3886 m/s[/mathml]

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MathPlayer is a plugin for Internet Explorer, not Firefox, that enables it to display MathML in web pages.

Paul

I figured that after I wrote the entry.

Internet Explorer does not function correctly after installing MathML.