Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: [Phys-l] Fun/cool unit conversion example?

A few additional useful rules of thumb:

Speed of sound *in water*: 1.5 mm MHz

I remember thermal energy at room temperature by 1/40 eV, which is of course exactly what JD says.

Near Earth's surface, length of a simple pendulum in meters ~ 1/4*T^2, with T in seconds.

Specific gravities: Pb ~ 11; Hg ~ 14; Au ~ 19. Thus my scoffing when movie people throw around gold bricks so easily.

Down with categorical imperative!