The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) © Scott Creighton 2008 Test 1.

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Presentation transcript:

The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) © Scott Creighton 2008 Test 1

The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) © Scott Creighton 2008 Test 1 START

The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) © Scott Creighton 2008 Test 1

1 Sec The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) © Scott Creighton 2008 Test 1 1 Swing

2 Sec The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) © Scott Creighton 2008 Test 1 1 Swing

2 Swings 2 Sec The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) © Scott Creighton 2008 Test 1

2 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 1 2 Swings

3 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 1 3 Swings

3 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 1 3 Swings

3 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 1 4 Swings

4 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 1 4 Swings

4 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 1 5 Swings

4 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 1 5 Swings

4 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 1 6 Swings

4 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 1 6 Swings

5 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 1 7 Swings

5 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 1 7 Swings

5 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 1 8 Swings

6 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 1 8 Swings

6 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 1 9 Swings STOP

© Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) In Test 1 the number of swings was not equal to the number of seconds that had elapsed. Let us try the same test again but this time we will use a slightly longer pendulum cord.

The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) © Scott Creighton 2008 Test 2

The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) © Scott Creighton 2008 Test 2 START

The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) © Scott Creighton 2008 Test 2

The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) © Scott Creighton 2008 Test 2

1 Sec The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) © Scott Creighton 2008 Test 2 1 Swing

The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) © Scott Creighton 2008 Test 2 1 Swing 1 Sec

2 Sec The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) © Scott Creighton 2008 Test 2 2 Swings

© Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 2 2 Swings 2 Sec

3 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 2 3 Swings

© Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 2 3 Swings 3 Sec

4 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 2 4 Swings

© Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 2 4 Swings 4 Sec

5 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 2 5 Swings

© Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 2 5 Swings 5 Sec

6 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 2 6 Swings STOP

6 Sec © Scott Creighton 2008 The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) Test 2 1 Full Pendulum Swing = 2 Seconds of elapsed Time. 6 Swings

The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) By changing the length of the Pendulum Cord we can synchronise the number of pendulum swings with each second that passes in the hourglass timer so that each full swing of the pendulum (i.e. the return of the pendulum to its start position) is equal to 2 seconds of elapsed time. (1 half-swing = 1 second of elapsed time) For this synchronisation to occur at Giza, the ancient designers – through trial and error - would eventually have reached a pendulum cord length of 39 inches (2 second pendulum swing).

The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) With the duration of the Giza sunset (at equinox) lasting 148 seconds (rounded), we can now use this to define the length of the Pendulum Gravity Cubit. 148 x 39 = 5,772 inches = 280 AE Royal Cubits (height of Great Pyramid) © Scott Creighton 2008

The Pendulum Gravity Cubit (Defining Distance as a Measure of Time) The End © Scott Creighton 2008