Timekeeping Devices
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Brewster
Brewster
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TECHNOLOGY
Timekeeping Devices
Wristwatch
Wristwatches transformed from dismissed accessories to essential military tools
8 Feb 2026
0
What was a key factor that led to the widespread adoption of wristwatches over pocket watches?
The need for quick and easy access to time during active situations like military operations
Wristwatches were cheaper to produce than pocket watches
Pocket watches were banned during World War I, forcing the use of wristwatches
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Bonbo
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TECHNOLOGY
Timekeeping Devices
Radio Room Clock Face
Radio room clocks use 24-hour dials to ensure precise global communication timing
7 Feb 2026
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Why do radio room clocks typically use a 24-hour dial instead of a 12-hour dial?
Because 24-hour dials are easier to manufacture than 12-hour dials.
Because radio room clocks do not need to show minutes or seconds.
To avoid confusion between AM and PM and ensure precise timing for international radio communications.
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Bonbo
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TECHNOLOGY
Timekeeping Devices
Clock Face
The clock face design with 12-hour numbering and rotating hands is a universal symbol of time measurement
3 Feb 2026
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Why does the hour hand on a traditional clock face make two revolutions in a day?
Because it moves faster than the minute hand to keep up with the time changes.
Because it completes one revolution every 24 hours, matching the full day cycle.
Because it completes one revolution every 12 hours, covering the full 24-hour day in two cycles.
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PeterPan
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TECHNOLOGY
Timekeeping Devices
Pendulum Clock
Pendulum clocks revolutionized timekeeping and daily life during the Industrial Revolution
29 Jan 2026
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What fundamental property of a pendulum makes it suitable as a timekeeping element in clocks?
It swings back and forth in a precise time interval dependent on its length, acting as an approximate harmonic oscillator.
It swings at varying speeds depending on external temperature changes.
It completes a swing in a fixed time regardless of its length or weight.
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SteveO1
Technology and cars
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TECHNOLOGY
Timekeeping Devices
Clock Face
The clock face design with rotating hands has been a universal symbol for time for centuries
28 Jan 2026
0
Why does the hour hand on a traditional clock face make two revolutions in a day?
Because it moves faster than the minute hand to keep up with the time.
Because it completes one revolution every 12 hours, covering the full 24-hour day in two revolutions.
Because it completes one revolution every 24 hours, matching the full day cycle.
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PeterPan
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TECHNOLOGY
Timekeeping Devices
Pendulum Clock
Pendulum clocks revolutionized timekeeping with precise swings that shaped modern schedules
18 Jan 2026
0
What physical property of the pendulum primarily determines the precise time interval of its swing in a pendulum clock?
The weight of the pendulum bob
The material of the pendulum rod
The length of the pendulum
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