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<p> How long does it take to fall during the Earth?<br>
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<p>How long will it take to fall in a hole through the earth, and reach the other side of the planet, this research is presented entitled gravitational tunnel is a tubular hole from one side of the globe to the other side, which passes the center of the planet, and the answer was much less than it was As the time it takes for the fall to reach the other side of the Earth is about 42 minutes and 12 seconds, as scientists have been looking for answers for half a century.<br>
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<p>Scientific assumptions about the length of time it takes to fall through the globe:<br>
<img src="https://www.universemagic.com/images/2017/04/9382_1_or_1491527411.jpg" width="600" height="600"/></p>
<p><a href="https://www.universemagic.com/images/2017/04/9382_1_or_1491527411.jpg">Source</a><br>
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<p>Solving this issue depends on the gravity of the earth, which in turn is based on mass. When you fall through a hole passing through the center of the earth, the mass decreases with time, so the force of gravity will decrease when approaching from the center of the earth.<br>
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<p>Assuming that there is no air resistance, the propulsion force is thrown all the way to the surface of the other side of the globe. When someone falls inside the hole, you must make sure you get out of the opening hole otherwise it will pass back and forth inside the gravity tunnel.<br>
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<p>"You can imagine that a fall like a watercraft takes about 40 minutes and that it's up to 8 kilometers per second," said Alexander Klutz, a physicist at McGill University in Montreal. "By the middle of the road, gravity will shift the trends from the top right side to the upside down. The other one.<br>
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<p>However, at least one of the major unrealistic hypotheses has passed this calculation since it was first made in 1966, ignoring for a moment how digging a hole about 7,918 miles (12,742 kilometers) through the earth is almost impossible, The problem was that with 42 minutes, the solution was to assume that the Earth had one density all over the globe.<br>
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<p>Now, using a more realistic model of the Earth, Clutz finds that the fall takes about 38 minutes and 11 seconds, about 4 minutes faster than the previous one, and Claus was based on the internal shape of the planet as indicated by the seismic data, Density is less than 187 lbs per cubic foot (3 grams per cubic centimeter), the center of the earth has a density of about 811 lbs per cubic foot (13 grams per cubic centimeter), the density of the planet does not rise directly as you go far down and there is a sharp increase of 50 Per cent in the density of the crust of the planet and the nucleus of the earth about 1800 miles (2,900 km) Underground.<br>
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<p>The physicists assumed that there is no air resistance inside the gravitational tunnel. Clottez said that in my opinion if you have the technology to dig such a tunnel, you have the technology to absorb the outer air. It is surprising that Clutz has found that it roughly calculates the corresponding answer if the gravitational pull force Uniform around the globe and equal in value to the surface. Clutz said this assumption works because the earth's gravity changes only by 10 percent as it descends into the depths of the first 3,000 km.<br>
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<p>We do not expect anyone to test these calculations with a real tunnel through the earth any time soon. Clutz said the Soviets tried to dig as deep a hole as possible from 1970 to 1989 and only got a depth of 12 kilometers (about 7,7 miles) ) And about 0.1% below the earth's surface </p>
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