When was the Earth's gravitational field weakened? Detailed answer

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When was the Earth's gravitational field weakened? Detailed answer

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When was the Earth's gravitational field weakened?

On April 1, 1976, English astronomer Patrick Moore pranked listeners on BBC radio by announcing that at 9:47 a rare astronomical effect would happen: Pluto would pass behind Jupiter, enter into gravitational interaction with it and slightly weaken the Earth's gravitational field. If the listeners jump at this point, they must experience a strange feeling. Starting at 9:47 a.m., the BBC received hundreds of calls reporting the strange feeling, with one woman even claiming she and her friends were up from their chairs and flying around the room.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

Why is lava hot?

The earth in the center is a very hot place. If we could get closer to the center of the Earth at 48 km, the temperature there would be 1200 degrees Celsius. At the core, or center, of the Earth, the temperature reaches 5500 degrees Celsius. At this temperature, the stone exists in a molten state. Lava is molten rock mixed with steam and gas that erupts with force from the bowels of the Earth. It breaks from the center of the Earth through cracks in the crust.

Sometimes cracks are round. Then the lava comes out through them, spills into a round puddle and freezes in the shape of a mountain. If the lava erupts again, it builds up on the first eruption and makes the mountain taller. If the eruptions are repeated, layer after layer is superimposed, a mountain is formed, called a volcano. When lava erupts and spills over the Earth, it destroys everything in its path.

This happens because the rapid flow of molten stone has a temperature of 1090 to 1640 degrees Celsius. Cities that are located close to volcanoes are always in danger of being destroyed in the event of a lava eruption. Sometimes this does not happen for a long time and people believe that they are safe forever. And then suddenly the eruptions start again. This happened two millennia ago with the Italian city of Pompeii. It was completely buried under a lava flow and a layer of ash from Mount Vesuvius.

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Sedentary work strengthens mental abilities 14.07.2020

People who have worked in a sedentary job all their lives are at a lower risk of cognitive impairment in old age. This conclusion was made by scientists from the University of Cambridge.

Experts analyzed the lifestyle of 8500 people aged 40 to 79 years. All of them had a different education and a wide circle of friends. Participants filled out questionnaires about their health, lifestyle and hobbies. Volunteers were examined, scientists studied their physical activity at work and after it.

The experiment was long-term - after 12 years, the researchers again studied the condition of the participants and did a series of tests to understand how their cognitive abilities had changed: memory, attentiveness, reading speed and information processing.

People who worked in the office throughout the study period showed the best test results - there were 10%. Those who were engaged only in manual labor worsened their performance by almost three times.

Scientists note that despite the results of the study, physical activity is important for health. A sedentary lifestyle will only keep your cognitive abilities in old age if it doesn't kill you sooner.

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