Anglais example sentences with "helium"

It is, moreover, very difficult to explain in any other way why there should be so much helium in the universe.
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Jupiter is a planet principally composed of hydrogen and helium.
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Helium, neon, argon, krypton, xenon and radon are noble gases.
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Tom filled the balloons with helium.
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Helium is a gas.
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Mercury's atmosphere is very thin and is composed of helium and sodium.
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Our atmosphere contains 21% oxygen, which is necessary for us to breathe, 78% nitrogen, and 0.9% argon. The other 0.1% consists of water vapor, carbon dioxide, neon, methane, krypton, helium, xenon, hydrogen, nitrous oxide, carbon monoxide, nitrogen dioxide, sulfur dioxide, and ozone.
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Jupiter is made mostly of hydrogen and helium gases.
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Jupiter's atmosphere is thought to be composed of hydrogen, helium, sulfur, and nitrogen. Clouds in the atmosphere move in alternating bands from east to west or west to east.
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Uranus' atmosphere is made up of hydrogen, helium, and methane.
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Neptune has a mantle of liquid hydrogen while the atmosphere is a combination of ammonia, helium, and methane. In the upper atmosphere, methane freezes and forms an ice cloud which casts a shadow on the clouds below.
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Helium is the second simplest atom. It consists of a nucleus containing 2 protons and 2 neutrons. Around the nucleus orbits 2 electrons.
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A nebula is an interstellar cloud of dust, hydrogen, helium and other ionized gases.
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Tom filled the balloon with helium.
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This balloon floats because it's filled with helium.
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Helium is capable of penetrating glass.
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Instead of canvas, solar sails are made of thin sheets of Mylar, the same crinkly silver material often used for helium-filled balloons.
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Helium is the name for the element with atomic number 2 and is represented by the symbol He. It is a member of the noble gases group.
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Helium is the second simplest atom. It consists of a nucleus containing two protons and two neutrons. Around the nucleus orbits two electrons.
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Another lunar resource of potential development value is helium-3, which can be used for nuclear fusion fuel.
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Helium-3 is scarce on the Earth.
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With the price of helium these days, I'm curious how much they paid for all of these balloons.
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Managers met Friday to discuss plans to fix helium and nitrogen leaks on the right side of the pressurization portion of the shuttle's orbital maneuvering system.
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First, they load crushed dry ice into a hopper suspended under a big helium balloon.
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In examining a large number of minerals for helium, Strutt found that some samples of beryl, a beryllium aluminium silicate, contain a relatively very large amount of helium, but only traces of thorium, and were altogether inactive.

Like all modern airships, the new Zeppelin NT is filled with the inert gas helium, instead of the highly flammable hydrogen gas that doomed the Hindenburg. With its three propellers, it can fly at about 100 kilometers an hour with a good tailwind—and at a height of about 2,000 meters.

Uranus tilts over so far on its axis that it rotates on its side. Because of this, its poles are sometimes pointed almost directly at the Sun. Uranus' atmosphere is made up of hydrogen, helium, and methane. The temperature in the upper atmosphere is very cold. The cold methane gas is what gives Uranus its blue-green color. The rapid rotation of Uranus causes winds up to 600 kilometers per hour to blow in its atmosphere. Uranus has eleven known rings which contain dark, boulder-sized particles. Uranus has 27 named moons. Some of these moons are less than 100 kilometers wide and black as coal.

The sun is a giant ball of hot gas, mostly hydrogen and helium.

Red dwarves are the smallest stars in which hydrogen is converted into helium.