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New Tools: Sunrise, Sunset, Day Length, Local Time around the World - over 200,000 cities around the World, e.g. Sunrise in NYC today, August Solar Eclipse in US
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How long does it take light to travel from Sun to the Earth
The Earth is 93 million miles (150 million kilometers) away from the Sun. It is average distance because Earth orbit is elliptical. The speed of light in a vacuum is 300,000 km/s so the light travel approximately about 8 minutes (more exactly: 499 seconds)
The half-life of a quantity whose value decreases with time is the interval required for the quantity to decay to half of its initial value. The half-Life of Iodine123 is about 13.1 hour.
How long does a human pregnancy last?
The duration of pregnancy in humans is about 40 weeks (280 days, equal to 9 calendar months) from the date of the last menstrual period.
Czas obiegu Ziemi wokół Słońca
Rok Gwiazdowy Ziemi, czyli czas przejścia Słońca przez ten sam punkt na ekliptyce wynosi ok. 365 dni 6 godzin 9 minut 9.54 sekundy, czyli 365.256366 ziemskiego dnia.
The half-life of a quantity whose value decreases with time is the interval required for the quantity to decay to half of its initial value The half-life of Carbon14 takes 5730 years.
The Age Of The Earth
Modern geologists and geophysicists consider the age of the Earth to be around 4.54 billion years (4.54 × 109 years ± 1%).
Fundamental unit of time in the International System Of Units (SI) is:
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