the origin of the historical development of hours

Expected to be found and used by monks to mark his time praying with media bells ..

Only in the 1500s a locksmith from Germany found a home with a diameter of 10cm hours until 12.5 cm and a thickness of 7.5 cm ..

At the end of the sixteenth century, the bells began to be made up, in the seventeenth century clockwork began to be enriched with a layer of brass and glass cover and stylus minutes ..

In 1656, born Grandfather's Clock [clock with bells berpendulum] as a measure of time that you ..

Then its role as a reliable timepiece replaced by Crystal Quatrz which began to be applied on the hour with a very low error rate ..

Continues, Why in 1 day 24 hours there ...?

answer:

At first, the second term in English is known as

"second minute" (second minute), which means a small part of an hour.

The first part is known as the "prime minute" (minute premiere)

same with the minutes as it is known today.

The magnitude of this division fixated on 1/60, that is, there are 60 minutes in an hour

and there are 60 seconds in a minute.

It may be caused by the influence of the Babylonians,

which uses a count system based sexagesimal (base 60).

The term clock itself has been discovered by the Egyptians

the rotation of the earth as 1/24 of the mean solar day.

This makes the second as 1 / 86,400 of a mean solar day.

In 1956, the International Committee for Weights and Measures (CIPM)

under the mandate given by the General Conference on Weights and Measures (CGPM)

to ten in 1954, describes the second in a period of rotation of the earth around the sun in the current epoch.

Because at the moment it has been realized that the rotation of the earth on its axis is not quite uniform

to be used as a standard time.

Earth movement was described in Newcomb's Tables of the Sun (solar List Newcomb),

which gives a formula for the movement of the sun in the epoch in 1900

based on astronomical observations made during the eighteenth and nineteenth centuries.

Thus the second is defined as

1 / 31,556,925.9747 part of the sun at date 0 January 1900 12 hours ephemeris time.

This definition is ratified by the General Conference on Weights and Measures to eleven in 1960.

References to 1900 does not mean this is the epoch of the mean solar day contains 86,400 seconds.

Rather it is the epoch of the tropical year which contains 31,556,925.9747 seconds of Ephemeris Time.

Ephemeris Time (Ephemeris Time - ET) has been defined as a measure of time that gives

the position of celestial objects visible in accordance with Newton's theory of dynamic movement.

With the making of the atomic clock, it was determined using an atomic clock

as the basis for the definition of seconds, no longer with the rotation of the earth.

From the work of a few years, two astronomers at the United States Naval Observatory (USNO)

and two astronomers at the National Physical Laboratory (Teddington, England)

determine the relationship of the hyperfine transition frequency of the cesium atom and the ephemeris second.

By using common-view measurement method based on signals received from the radio station WWV,

they determine that the orbital motion of the moon around the earth

That of which the apparent motion of the sun can be guessed, in units of atomic clock time.

As a result, in 1967, the General Conference on Weights and Measures defined the second of atomic time

in the International System of Units (SI) as the duration of 9,192,631,770

radiation with respect to the period of transition between the two hyperfine levels of the ground state of the cesium-133 atom. http://tokojamtanganfashion.com

The ground state is defined in the lack of circumstances (zero) magnetic field.

Seconds are defined the same as ephemeris seconds.

Definition seconds later was perfected in meeting the BIPM to include the sentence

This definition refers to a cesium atom stationary at a temperature of 0 K.

In practice, this means that the realization of seconds with high accuracy should compensate for the effects of radiation around

to try mengextrapolasikan to the second price as mentioned above.

The origin of the hourglass

Hourglass sand clock or consists of two glass filled with fine sand that bloat [one above one below] and connected oeh narrow pipe.

Rata2 shows the time for one hour.

Factors having an effect in the appointment time is, the volume of the tube, the type of quality sand and wide neck.

According to experts hourglass bbrp d Alexandria created around the middle of the third century.

Where at that time, orang2 bring hourglass kemana2 like that we do with this skarang hours.

There jg who argued in the 11th century, also added a compass to indicate the direction.

Another opinion, hourglass first appeared in the year 1338 is estimated based on the painting Allegory of Good Government of Ambrogio Lorenzetti.

Note that the initial hit was found where the hourglass is a list of Thomas de Stetesham sales revenues in the year 1335

Expected to be found and used by monks to mark his time praying with media bells ..

Only in the 1500s a locksmith from Germany found a home with a diameter of 10cm hours until 12.5 cm and a thickness of 7.5 cm ..

At the end of the sixteenth century, the bells began to be made up, in the seventeenth century clockwork began to be enriched with a layer of brass and glass cover and stylus minutes ..

In 1656, born Grandfather's Clock [clock with bells berpendulum] as a measure of time that you ..

Then its role as a reliable timepiece replaced by Crystal Quatrz which began to be applied on the hour with a very low error rate ..

Continues, Why in 1 day 24 hours there ...?

answer:

At first, the second term in English is known as

"second minute" (second minute), which means a small part of an hour.

The first part is known as the "prime minute" (minute premiere)

same with the minutes as it is known today.

The magnitude of this division fixated on 1/60, that is, there are 60 minutes in an hour

and there are 60 seconds in a minute.

It may be caused by the influence of the Babylonians,

which uses a count system based sexagesimal (base 60).

The term clock itself has been discovered by the Egyptians

the rotation of the earth as 1/24 of the mean solar day.

This makes the second as 1 / 86,400 of a mean solar day.

In 1956, the International Committee for Weights and Measures (CIPM)

under the mandate given by the General Conference on Weights and Measures (CGPM)

to ten in 1954, describes the second in a period of rotation of the earth around the sun in the current epoch.

Because at the moment it has been realized that the rotation of the earth on its axis is not quite uniform

to be used as a standard time.

Earth movement was described in Newcomb's Tables of the Sun (solar List Newcomb),

which gives a formula for the movement of the sun in the epoch in 1900

based on astronomical observations made during the eighteenth and nineteenth centuries.

Thus the second is defined as

1 / 31,556,925.9747 part of the sun at date 0 January 1900 12 hours ephemeris time.

This definition is ratified by the General Conference on Weights and Measures to eleven in 1960.

References to 1900 does not mean this is the epoch of the mean solar day contains 86,400 seconds.

Rather it is the epoch of the tropical year which contains 31,556,925.9747 seconds of Ephemeris Time.

Ephemeris Time (Ephemeris Time - ET) has been defined as a measure of time that gives

the position of celestial objects visible in accordance with Newton's theory of dynamic movement.

With the making of the atomic clock, it was determined using an atomic clock

as the basis for the definition of seconds, no longer with the rotation of the earth.

From the work of a few years, two astronomers at the United States Naval Observatory (USNO)

and two astronomers at the National Physical Laboratory (Teddington, England)

determine the relationship of the hyperfine transition frequency of the cesium atom and the ephemeris second.

By using common-view measurement method based on signals received from the radio station WWV,

they determine that the orbital motion of the moon around the earth

That of which the apparent motion of the sun can be guessed, in units of atomic clock time.

As a result, in 1967, the General Conference on Weights and Measures defined the second of atomic time

in the International System of Units (SI) as the duration of 9,192,631,770

radiation with respect to the period of transition between the two hyperfine levels of the ground state of the cesium-133 atom. http://tokojamtanganfashion.com

The ground state is defined in the lack of circumstances (zero) magnetic field.

Seconds are defined the same as ephemeris seconds.

Definition seconds later was perfected in meeting the BIPM to include the sentence

This definition refers to a cesium atom stationary at a temperature of 0 K.

In practice, this means that the realization of seconds with high accuracy should compensate for the effects of radiation around

to try mengextrapolasikan to the second price as mentioned above.

The origin of the hourglass

Hourglass sand clock or consists of two glass filled with fine sand that bloat [one above one below] and connected oeh narrow pipe.

Rata2 shows the time for one hour.

Factors having an effect in the appointment time is, the volume of the tube, the type of quality sand and wide neck.

According to experts hourglass bbrp d Alexandria created around the middle of the third century.

Where at that time, orang2 bring hourglass kemana2 like that we do with this skarang hours.

There jg who argued in the 11th century, also added a compass to indicate the direction.

Another opinion, hourglass first appeared in the year 1338 is estimated based on the painting Allegory of Good Government of Ambrogio Lorenzetti.

Note that the initial hit was found where the hourglass is a list of Thomas de Stetesham sales revenues in the year 1335