Every Second Counts – how is time measured ?

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THE GREATEST GIFT YOU CAN GIVE SOMEONE IS YOUR TIME BECAUSE WHEN YOU GIVE YOUR TIME. YOU ARE GIVING A PORTION OF YOUR LIFE THAT YOU WILL NEVER GET BACK.

How do we measure time?

By observing the Earths movements relative to the Sun. One complete spin of the Earth on its axis takes a day. Approximately 365.26 spins (days) make one complete revolution of the Sun, or one solar Year. Units of time smaller than a day, such as hours, minutes and seconds, are measured using clocks. Weeks, months and years are measured using calendars.

Time to find out more…

TIME ZONES

If everyone in the world set their clocks to the same time, when it was midnight it would be daylight in one part of the world and the middle of the night in another. To avoid this, Earth is divided into zones.

DETAIL

  • Time zones generally follow lines of longitude (imaginary lines running from pole to pole), but usually bend to include entire countries or states in one time zone.
  • There are 24 time zones, each of 15o of longitude and one hour
  • India straddles more than one time zone but has chosen a time halfway between those on either side so that the whole country can use one time.
  • Russia has 11 time zones– more than any other country.
  • China stretches across four time zones but uses only one time.
  • The International Date line dividing one day from the next follows the 180o meridian (longitude) on the globe
  • Countries east of the date line are a day ahead of those to the
  • The International Date Line runs mostly through the oceans, but where it would pass through or near land it bends to avoid dividing a region into two days.

TICK TOCK

Clocks keep time by measuring a constantly repeating motion. This may be the swing of a pendulum r the vibrations of atoms.

FAMILY TIME IS NOT A MATTER OF CONVENIENCE. IT’S A MATTER OF PRIORITY.

Blasts from the past

  • 1500 BCE

Sundials are used in Egypt to define time periods such as morning and afternoon, and to measure the longest and the shortest days of the year.

  • 1400 BCE

Water clocks are used in Egypt. Water drains from a vessel, reaching different levels that represents different time.

  • 1000s CE

Arab engineers invented the first mechanical clock driven by weights and gears.

  • 1100s

Monks use the hourglass to show the times of prayer.

  • 1325

The first clock with a dial is installed in Norwich Cathedral, England.

  • 1335

First clock to strike the hours is made in Milan, Italy.

  • 1350

The oldest known alarm clock is made in Wuzburg, Germany.

  • 1949

The first atomic clock is built. This precise time keeper measures a vibrations of an atom.

NEVER GIVE UP GREAT THINGS TAKE TIME.

I don’t believe it!

Air passengers crossing from Tonga to Samoa– a two-hour flight across the International Date Line- often arrive the day before they left!

COUNTING TIME

Picosecond= 0.000,000,000,001 seconds

Nanosecond= 0.000,000,001 seconds

Microsecond= 0.000,001 seconds

Millisecond= 0.001 seconds

Minute= 60 seconds

Hour= 60 minutes = 3,600 seconds

Day= 24 hours = 86,400 seconds

Week= 7 days = 604,8000 seconds

Fortnight= 14 days = 2 weeks

Month= 28 to 31 days

Quarter= 3 months

Year= 12 months = 365 days = 25 weeks + 2 days

Leap year= 366 days = 52 weeks + 2 days

Decade= 10 years

Century= 100 years

Millennium= 1,000 years

ALL WE HAVE TO DECIDE IS WHAT TO DO WITH THE TIME THAT IS GIVEN TO US.


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