Expansion occurs when a substance is heated. The energy given to the molecules in the substance causes them to vibrate and so they get pushed further apart, causing the substance to expand.
If gravity dominated the expansion of the universe, the universe would eventually stop expanding and begin to contract. This would lead to a "Big Crunch" scenario where all matter in the universe collapses back into a hot, dense state.
Yes, explosions can occur in space, but they differ from explosions on Earth due to the absence of atmosphere. In space, explosions can happen in a vacuum and are often driven by chemical reactions, nuclear reactions, or the rapid expansion of gases. For instance, supernovae are massive stellar explosions that occur when a star exhausts its nuclear fuel. However, the lack of air means there is no sound to accompany these explosions, and the energy is released in different forms, like radiation.
The sun is powered by nuclear fusion in its core, converting hydrogen into helium. Eventually it will run out of hydrogen fuel and start fusing helium, leading to its expansion into a red giant and eventually shedding its outer layers, forming a planetary nebula. This process will happen in about 5 billion years.
The sun is estimated to reach a size where it engulfs Mercury and Venus, likely extending out to Earth's orbit. This expansion is expected to happen in around 5 billion years as the sun evolves into a red giant before eventually collapsing into a white dwarf.
A red giant is caused by the expansion and cooling of a star as it exhausts its core hydrogen fuel and begins to burn helium. This expansion occurs because the core contracts, increasing the temperature and pressure in the outer layers, leading to their expansion and the star's overall growth in size.
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There has to be a built in expansion chamber or release valve. Otherwise the expansion would cause an explosion.
Expansion in the universe happens everywhere, as galaxies move away from each other due to the continuous expansion of space itself. This expansion is described by the theory of the Big Bang, where the universe started as a singularity and has been expanding ever since.
"Busted" Season 3 Episode 6
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It seems it won't happen. The expansion of the Universe is accelerating - instead of slowing down, it expands faster and faster.
They're called "expansion joints". Concrete expands and contracts with temperature changes. The expansion joints allow this to happen without cracking the concrete slab.
It happened by taking over Indians' land, buying territories to other countries, and by winning wars.
When heated, the drilled hole in a sheet of aluminum will expand due to thermal expansion. This expansion occurs because as the temperature of the aluminum increases, the atoms vibrate more vigorously, causing the material to expand.
Thermal expansion and contraction occur in materials when they are exposed to changes in temperature. This can happen in solids, liquids, and gases, leading to changes in volume, length, or density of the material. It is a common phenomenon experienced in everyday objects and structures.