Flash Cards
1/21
What is time?
Time is a measured or measurable period during which an action, process, or condition exists or continues.
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2/21
What is a stopwatch?
A stopwatch is a handheld timepiece designed to measure the amount of time that elapses between its activation and deactivation.
3/21
Define a sundial.
A sundial is a device that tells the time by the position of the sun's shadow on a flat surface marked with hours.
4/21
How do water clocks work?
Water clocks measure time by the flow of water in and out of a container, typically with marked intervals for tracking time.
5/21
What does the time period of a pendulum depend on?
The time period of a pendulum depends on its length; longer pendulums have longer periods.
6/21
What is the SI unit of time?
The SI unit of time is the second, abbreviated as 's'.
7/21
Difference between mechanical and atomic clocks?
Mechanical clocks use gears and weights, while atomic clocks use the vibrations of atoms for highly accurate timekeeping.
8/21
What is an hourglass?
An hourglass is a timekeeping device that measures time through the flow of sand from one bulb to another.
9/21
Explain the concept of periodic motion.
Periodic motion is a motion that repeats itself at regular intervals of time.
10/21
What is a candle clock?
A candle clock is a timekeeping device that has markings on a candle indicating the time as the candle burns down.
11/21
What is a Ghatika-yantra?
The Ghatika-yantra is a type of water clock developed in ancient India that measured time based on the sinking of a bowl.
12/21
Identify common timekeeping devices.
Common timekeeping devices include sundials, water clocks, stopwatches, and mechanical clocks.
13/21
Why is it important to measure time accurately?
Accurate time measurement is crucial in fields like sports, medicine, and space exploration.
14/21
What was Galileo’s contribution to time measurement?
Galileo discovered that the time taken for a pendulum's swing is constant for a given length.
15/21
Define time period.
The time period is the duration it takes for an oscillating system to complete one full cycle of motion.
16/21
Common mistake: Writing 'sec' for seconds?
'sec' is not correct for writing seconds in scientific contexts. Use 's' instead.
17/21
What is the conversion of seconds to minutes?
60 seconds (s) equal 1 minute (min).
18/21
How do modern clocks measure time?
Modern clocks use periodic processes like quartz vibrations or atomic transitions to measure time.
19/21
Difference between seconds and milliseconds?
1 second (s) equals 1,000 milliseconds (ms), with milliseconds measuring much smaller time intervals.
20/21
What is the purpose of markings on timekeeping devices?
Markings help quantify time intervals, allowing for precise measurements as time progresses.
21/21
Explain how pendulum motion is periodic.
Pendulum motion is periodic because it repeats the same path with each swing, completing cycles at consistent intervals.
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