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A light year is the distance traveled by light in one year. Multiply light years by 9,460,730,472,580,800 (approximately 9.5 trillion or 9.46 x 10**12) to get kilometers. Other values sometimes seen are the result of rounding errors in the speed of light, or in how to define a "year". Scientists tend to use "parsecs" rather than light-years; light years are used more in popular science publications.
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How much would 280 mph converted in km be?
280 mph = 450.6 kph
When did the dinosaurs became extingt?
Dinosaurs became extinct around 65 million years ago during the Cretaceous-Paleogene extinction event. It is believed that a combination of climate change, asteroid impact, and volcanic activity contributed to their extinction.
How much have the atmospheric carbon dioxide concentrations increased in recent years?
Over the last 150 years, CO2 concentrations have increased from around 300 ppm to around 400 ppm - mostly in the last 70 years or so. Current scientific thinking is that anything over 350 ppm is likely to have unwanted consequences.
What is the normal carbon monoxide level in your body?
On earth carbon dioxide levels varied from 250 parts per million to 280 ppm over the past 800,000 years, per ice core samples. There is additional decent proxy evidence to indicate CO2 has not exceeded 280 ppm over the past 20 million years. Before the industrial revolution began in 1700, CO2 was at the 280 ppm maximum. We would expect without human activity CO2 would still be about 280 ppm, as the normal variation was roughly 5 parts per million over the course of a thousand years. Many scientists believe 350 parts per million might be earth's maximum sustainable level. We are now at 400 parts per million and at present rates will pass 500 parts per million before 2050, less than 40 years from now.
How long ago did the Permian era begin?
According to the 2012 Geologic Time Scale the Permian Period of the Paleozoic Era lasted from about 298.9 million to 252.2 million years ago. It is the last (latest) period of the Paleozoic.
What is 7.5 percent of 280 million?
7.5 percent of 280 million is 21 million.
Is a helicoprion real?
Yes they are real. They were first on earth 280 million years ago and then went extinct 225 million years ago.
Was a dinosaur the first Vertebrate?
The first vertebrate was Pikaia, which lived 510 million years ago, 280 million years BEFORE dinosaurs.
When did the Gorgonopsid live?
The late Permian, around 280 to 250 million years ago
How do you write 280 million?
280 million can also be written as 2.8*108 or 2.8E8.
How much would 280 mph converted in km be?
280 mph = 450.6 kph
What is 2.8 million in percentage?
It is 280 million%
What is 280 million times 1000?
280,000,000,000 or 280 billion
How many years did trilobites roam the earth?
Trilobites lived for 280 million years before they became extinct, from the Cambrian to the Permian.
What is 280 micrograms converted into grams?
0.0280 grams?
What is 20 percent of 280 million?
56 million
How to write 280 million in scientific notation?
280 × 10^8
