Wattage calculation for a 3v CR2032 Lithium coin battery
Using MathML

1 amp 1000 milliamps = x (amps) .2 milliamps

.2 milliamps ( 1 amp ) 1000 milliamps = x ( amps ) .2 milliamps .2 milliamps

.2 1000 = x ( amps )

.0002 = x

Therefore: 3 volts * .0002 amps = 0.0006 watts

Newton's Law of Gravity is:
height = 1 2 ( acceleration due to gravity ) ( time 2 )

Solving for t:
Multiply both sides by 2:
2 ( h ) = ( 1 2 a t 2 ) 2
2 h = a t 2

Divide by a:
2h a = t 2

Take the square root of both sides:
2h a = t 2

Computing time:
t = 2h a

time = 2 ( height ) acceleration due to gravity