Mechanical Universe Flashcards

1
Q

What were the first inventions used to tell time? by which civs? which was more accurate

A

Sundials and water clocks. Mesopotamia. Water clock more accurate

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2
Q

What was the benefit of sundials as opposed to water clocks

A

portability

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3
Q

What were the disadvantages to water clocks

A

not portable, would freeze

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4
Q

Who inveted the candle clock

A

China

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5
Q

What was the benefit of the candle clock, disadvantages?

A

Works indoors and at night. Not portable, could start fires, expensive

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6
Q

How did a candle clock work

A

divided into hours. see how much candle is left

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7
Q

Which mechanism used the first alarm clock? who used it?

A

candle clocks, monks

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8
Q

What were the advantage and disadvantage of sand clocks?

A

accurate for short periods of time, but needed to be flipped for long time. glass could only be produced in forence therefore $$$

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9
Q

What is the greatest invention along with the plow and printing press

A

the mechanical clock

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10
Q

what was the abul abbas clock?

A

a clock put together by Islamic scholars based of Archimedes. mounted on a white elephant. first cuckoo clock. Mechanical bird would signal hour passing by

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11
Q

What was the su song clock

A

most complex mechanical computer of its time. similar to Archimedes. chinese

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12
Q

where does the word clock come from?

A

clocka, latin, means bell

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13
Q

Who created the first mechanical clock alarm? why?

A

Richard of Wallingford, to wake monks up

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14
Q

What is the astrarium

A

Giovanni de’dondi’s mechanical computer of 1364. Most complex computer of its time. contained motions of all planets, calenders

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15
Q

Why was the astrarium so important?

A

universe was represented as a machine for the first time in medieval context, let to scientific revolution

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16
Q

Who was john harrison

A

a carpenter in the 18th century who created a series of accurate clocks

17
Q

What was the prize john Harrison had a lifelong dream of competing for?

A

longitude prize (20,000 euros). latitude easy to measure, longitude needed to be precise

18
Q

What level of accuracy was required to measure time for figuring out the longitudes of travel

A

1s per day, best at the time was 20 min per day

19
Q

What were the series of clocks that Harrison made called

A

Marine clocks, H series

20
Q

What is the story of john harrisons applying his clocks to the committee for the longitude prize

A

H4 claimed to be luck and negatives canceling out. H5, was successful enough. New rules, needed two identical time pieces, King forced parliament to pay pension.

21
Q

What was different about the H4?

A

it was a wrist watch

22
Q

How was the accuracy of the H4 confirmed

A

Taken by his son on voyage to Jamaica

23
Q

What did james cook say about his h4

A

too accurate, cannot risk it being captured by other nations

24
Q

how long was H5 most accurate clock in the world? how accurate was it

A

4 seconds every ten days. almost 200 years

25
Q

What is Patek Phillipe co.

A

technological retrogression. value watch as status symbol not accuracy

26
Q

what are the time trials

A

1700-1903 Britain. watchmakers submit most accurate timpieces for competition each year . Britain dominated each year

27
Q

what watch came along in 1968 to break the long standing accuracy record

A

1968 Seiko quartz watch