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Applications
68
Now that you own an HP-01 with built-in stopwatch, you can pinpoint the distance exactly. Set
the stopwatch to zero, and start it when lightning strikes. Stop it when you hear the thunder.
Multiply the display reading by 770 (speed of sound in miles per hour), or 1240 (speed of sound
in kilometers per hour).
Press
Display
0 Rr0B)
oo:oo.oo
e
oo:oo.oi
oo:o0.0e
@
e
0o:06.217
To obtain the answer in miles:
00000
1. 34084
Or to obtain the answer in kilometers, multiply the time (00:06.,
Display stopwatch (reset, or stop and
reset if running).
Lightning strikes.
Thunder sounds.
Miles.
) by 1240:
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