how smooth is the earth?
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In other words, it must have no pits or bumps more than 0.005 inches in height. That's pretty smooth. The ratio of the size of an allowable bump to the size of the ball is 0.005/2.25 = about 0.002.
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What is the average air pressure at the surface of the Earth? The standard, or near-average, atmospheric pressure at sea level on the Earth is 1013.25 millibars, or about 14.7 pounds per square inch. The gauge pressure in my automobile tires is a little more than twice that value.
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At the surface of the Earth, the acceleration due to gravity is roughly 9.8 m/s2 (32 ft/s2).
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Measurement: The average surface temperature on Earth is approximately 14°C; but as already noted, this varies. For instance, the hottest temperature ever recorded on Earth was 70.7°C (159°F), which was taken in the Lut Desert of Iran.
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Because there is no solid ground, the surface of Jupiter is defined as the point where the atmospheric pressure is equal to that of Earth. At this point, the pull of gravity is almost two and a half times stronger than it is on our planet.
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Earth's atmosphere is about 300 miles (480 kilometers) thick, but most of it is within 10 miles (16 km) the surface. Air pressure decreases with altitude. At sea level, air pressure is about 14.7 pounds per square inch (1 kilogram per square centimeter).
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Earth is also the densest planet in the Solar System, with a mean density of 5.514 g/cm3 (0.1992 lbs/cu in). Between its size, composition and the distribution of its matter, the Earth has a mass of 5.9736×1024 kg (5.9 trillion trillion kilograms) or 1.31668×1025 lbs (13 billion trillion tons).
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["Crust. Earth's crust is what we walk on every day. ... ", 'Mantle. Just below the crust lies the mantle. ... ', 'Outer Core. The outer core lies beneath the mantle. ... ', 'Inner Core. The inner core is the deepest layer on Earth.']
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In a new perspective on ocean health, one that looks through the lens of both humans and the natural world, scientists give Earth's seas a grade of 60 out of 100, meaning there's lots of room for improvement, they say.
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At the surface of the Earth, the acceleration due to gravity is roughly 9.8 m/s2 (32 ft/s2). The average distance to the centre of the Earth is 6,371 km (3,959 mi). Using the constant. , we can work out gravitational acceleration at a certain altitude.
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The Earth's crust ranges from 5–70 kilometres (3.1–43.5 mi) in depth and is the outermost layer. The thin parts are the oceanic crust, which underlie the ocean basins (5–10 km) and are composed of dense (mafic) iron magnesium silicate igneous rocks, like basalt.
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It is also the sixth-largest moon in the Solar System. ... Europa has the smoothest surface of any known solid object in the Solar System. The apparent youth and smoothness of the surface have led to the hypothesis that a water ocean exists beneath the surface, which could conceivably harbor extraterrestrial life.
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A free-falling object has an acceleration of 9.8 m/s/s, downward (on Earth).
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Plate tectonics and the Hawaiian "Hot Spot" According to the plate-tectonics theory, the Earth's surface consists of about a dozen rigid slabs or plates, each averaging at least 50 miles thick. These plates move relative to one another at average speeds of a few inches per year--about as fast as human fingernails grow.
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The layers of Earth are: Crust - 5 to 70 km thick. Mantle - 2,900 km thick. Outer Core - 2,200 km thick.
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Today, the Earth's axis is tilted 23.5 degrees from the plane of its orbit around the sun. But this tilt changes. During a cycle that averages about 40,000 years, the tilt of the axis varies between 22.1 and 24.5 degrees.
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Today, the Earth's axis is tilted 23.5 degrees from the plane of its orbit around the sun. But this tilt changes. During a cycle that averages about 40,000 years, the tilt of the axis varies between 22.1 and 24.5 degrees. Because this tilt changes, the seasons as we know them can become exaggerated.