"John Zinni" wrote in message
...
| "Androcles" Androcles@ MyPlace.org wrote in message
| k...
|
| "John Zinni" wrote in message
| ...
| | "Androcles" Androcles@ MyPlace.org wrote in message
| | ...
| |
| | "John Zinni" wrote in message
| | ...
| | | "francisco" wrote in message
| | | .. .
| | | how did galileo know that the pendulum swings at the same
| frequency
| | | regardless of the amplitude?
| | |
| | | note: since pendulum were crucial to the building of the
first
| | clocks,
| | | galileo couldn't have used a clock to find the answer.
| | |
| | | He could compare two or more pendulums of equal length but
| different
| | | amplitude.
| | |
| | Good Grief! Why don't you guess the answer instead of finding
out?
| |
| | In the 1600's everyone went to church, including Galileo
Galilei.
| | This filled the churches.
| | The people stank, and incense was burned to mask the odour.
| |
| |
| | Etymology: Middle English encens, from Old French, from Late
Latin
| | incensum, from Latin, neuter of incensus, past participle of
| incendere
| | to set on fire, from in- + -cendere to burn; akin to Latin
candEre
| to
| | glow -- more at CANDID
| | 1 : material used to produce a fragrant odor when burned
| | 2 : the perfume exhaled from some spices and gums when burned;
| broadly :
| | a pleasing scent
| |
| | To distribute the pong of burning incense, the incense pot was
hung
| | from the church roof by a long rope or chain and swung back and
| forth.
| |
| | Galileo, intelligent, sitting in church and bored with the
| repetitive
| | proceedings, timed the swing of the pot by counting his own
pulse.
| |
| | I seriously doubt that Galileo conducted all of his pendulum
| experiments
| | while bored out of his skull sitting in church.
|
| You can seriously doubt all you want, but it was the biggest
pendulum
| handy. Churches were the largest buildings around in the 17th
century,
| topped only by cathedrals and the Coliseum which didn't have a roof
| to hang a pendulum from.
|
| And this is relevant why??? You don't need the largest building around
to
| conduct a few simple pendulum experiments.

You do if you don't have a watch with a second hand on it.



| "Time measurement was a major issue in many of Galileo's experiments.
For
| his pendulum experiments, Galileo seems to have compared the pendulums
in
| pairs over the same time. For example, a person would be assigned to
each
| pendulum of the pair and between the words "start" and "stop" each
person
| would count the number of oscillations. This method was used for
comparison
| in these experiments."
|
http://galileo.rice.edu/lib/student_..._pendulum.html

That came later, when he wanted to refine his initial discovery.

|
|
| Slow pulse, no pocket watch, he needed a
| long swing to time as best he could.
| What do you think he used, a car tyre on a rope hanging from a tree
| with a kid swinging on it?
|
| Androcles
|
|
|
|
|