I-niciativa: Distancia al horizonte

Sunday, February 11, 2007

Distancia al horizonte

Para una persona de 1,75 metros de altura, la distancia que hay desde donde el está hasta la línea del horizonte que ve es de algo menos de 5 kilómetros.

Distancia al horizonte. Un jinete puede ver en un llano hasta 6 Km de distancia. Un marinero subido a un mástil a 20 metros de altura, ve el mar hasta 16 km alrededor de él. Desde lo alto de un faro que se eleve sobre el agua a 60 m, se verá el mar hasta casi 30 Km de distancia. Desde un avión situado a 1 Km de altura se abre una perspectiva de casi 120 Km. Desde 10 Km de altura se puede ver hasta 380 Km.
Cálculo de la distancia al horizonte
La distancia al horizonte depende de la altura desde la que se observe. El cálculo mediante fórmulas de la distancia al horizonte es sencillo:

Haciendo algunas cuentas con la calculadora, podemos comprobar que la distancia al horizonte es de 4'51 km para una persona de 1'60, 4'66km para una persona de 1'70, 4'8 km para una persona de 1'80... Pero esta fórmula también sirve para la Estación Espacial Internacional (ISS), que volando a una altura de 350 km tiene el horizonte a casi 2.100 km. Desde la ventanilla de un avión volando a 10 km de altura, el horizonte está a 357 km.

No comments:

Subscribe to: Post Comments (Atom)

29 September 1974

Your date of conception was on or about 6 January 1974 which was a Sunday.

You were born on a Sunday
under the astrological sign Libra.
Your Life path number is 5.

Life Path Compatibility:
You are most compatible with those with the Life Path numbers 1, 5 & 7.
You should get along well with those with the Life Path numbers 3 & 9.
You may or may not get along well with those with the Life Path number 8.
You are least compatible with those with the Life Path numbers 2, 4, 6, 11 & 22.

The Julian calendar date of your birth is 2442319.5.
The golden number for 1974 is 18.
The epact number for 1974 is 6.
The year 1974 was not a leap year.

Your birthday falls into the Chinese year beginning 1/23/1974 and ending 2/10/1975.
You were born in the Chinese year of the Tiger.

Your Native American Zodiac sign is Raven; your plant is Ivy.

You were born in the Egyptian month of Choiach, the fourth month of the season of Poret (Emergence - Fertile soil).

Your date of birth on the Hebrew calendar is 13 Tishri 5735.
Or if you were born after sundown then the date is 14 Tishri 5735.

The Mayan Calendar long count date of your birthday is 12.18.1.3.15 which is
12 baktun 18 katun 1 tun 3 uinal 15 kin

The Hijra (Islamic Calendar) date of your birth is Sunday, 12 Ramadan 1394 (1394-9-12).

The date of Easter on your birth year was Sunday, 14 April 1974.
The date of Orthodox Easter on your birth year was Sunday, 14 April 1974.
The date of Ash Wednesday (the first day of Lent) on your birth year was Wednesday 27 February 1974.
The date of Whitsun (Pentecost Sunday) in the year of your birth was Sunday 2 June 1974.
The date of Whisuntide in the year of your birth was Sunday 9 June 1974.
The date of Rosh Hashanah in the year of your birth was Tuesday, 17 September 1974.
The date of Passover in the year of your birth was Sunday, 7 April 1974.
The date of Mardi Gras on your birth year was Tuesday 26 February 1974.

As of 12/27/2006 8:32:12 AM EST
You are 32 years old.
You are 387 months old.
You are 1,682 weeks old.
You are 11,777 days old.
You are 282,656 hours old.
You are 16,959,392 minutes old.
You are 1,017,563,532 seconds old.

Celebrities who share your birthday:

Mackenzie Crook (1971)	Bryant Gumbel (1948)	Lech Walesa (1943)
Madeline Kahn (1942)	Jerry Lee Lewis (1935)	Anita Ekberg (1931)
Stanley Kramer (1913)	Greer Garson (1908)	Gene Autry (1907)
Miguel de Cervantes (1547)

Top songs of 1974

The Way We Were by Barbra Streisand	Seasons In the Sun by Terry Jacks
The Streak by Ray Stevens	Having My Baby by Paul Anka
Kung Fu Fighting by Carl Douglas	Billy, Don't Be a Hero by Bo Donaldson & the Heywoods
Annie's Song by John Denver	The Loco-Motion by Grand Funk
TSOP (The Sound of Philadelphia) by MFSB with the Three Degrees	I Can Help by Billy Swan

Your age is the equivalent of a dog that is 4.60939334637965 years old. (You're still chasing cats!)

There are 276 days till your next birthday
on which your cake will have 33 candles.

Those 33 candles produce 33 BTUs,
or 8,316 calories of heat (that's only 8.3160 food Calories!) .
You can boil 3.77 US ounces of water with that many candles.

In 1974 there were approximately 3.7 million births in the US.
In 1974 the US population was approximately 203,302,031 people, 57.4 persons per square mile.
In 1974 in the US there were approximately 2,158,802 marriages (10.6%) and 708,000 divorces (3.5%)
In 1974 in the US there were approximately 1,921,000 deaths (9.5 per 1000)
In the US a new person is born approximately every 8 seconds.
In the US one person dies approximately every 12 seconds.

In 1974 the population of Australia was approximately 13,831,978.
In 1974 there were approximately 245,177 births in Australia.
In 1974 in Australia there were approximately 110,673 marriages and 17,688 divorces.
In 1974 in Australia there were approximately 115,833 deaths.

Your birthstone is Sapphire

The Mystical properties of Sapphire

Though not meant to replace traditional medical treatment, Sapphire is used for clear thinking.

Some lists consider these stones to be your birthstone. (Birthstone lists come from Jewelers, Tibet, Ayurvedic Indian medicine, and other sources)

Agate, Moonstone, Lapis Lazuli

Your birth tree is

Hazelnut Tree, the Extraordinary
Charming, undemanding, very understanding, knows how to make an impression, active fighter for social cause, popular, moody and capricious lover, honest and tolerant partner, precise sense of judgement.

and 2 days have passed since Christmas 2006!
There are 11 days till Orthodox Christmas!

The moon's phase on the day you were
born was waxing gibbous.

Copyright © 2006 Paul R. Sadowski (http://www.paulsadowski.com)