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Expansion in science

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What does expansion mean in science? Scientific definitions for expansion An increase in the volume of a substance while its mass remains the same. Expansion is usually due to heating. When substances are heated, the molecular bonds between their particles are weakened, and the particles move faster, causing the substance to expand. What is expansion example?
What is the expansion of the universe? The expansion of the universe is the increase in distance between gravitationally unbound parts of the observable universe with time. It is an intrinsic expansion; the universe does not expand "into" anything and does not require space to exist "outside" it.
What is the difference between expansion and contraction in physics? expansion, in physics, increase in volume resulting from an increase in temperature. Contraction is the reverse process. When heat is applied to a body, the rate of vibration and the distances between the molecules composing it are increased and, hence, the space occupied by the body, i.e., its volume, increases.
What is the coefficient of expansion of a substance? The expansivity (coefficient of expansion) of a substance is its increase in length, area or volume per unit temperature rise. For a gas, the coefficient of expansion is the ratio of the rates of change of volume to temperature (at constant pressure), or of volume to pressure (at constant temperature).
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Thermal expansion | Temperature, Coefficient
WebSee all related content →. thermal expansion, the general increase in the volume of a material as its temperature is increased. It is usually expressed as a fractional change in length or volume per unit temperature change; a linear expansion...
https://www.britannica.com/science/thermal-expansion
Science for Kids: Learn About Expansion and Contraction
https://discover.hubpages.com/education/Science-for-Kids-Learn-About-Expansion-and-Contraction
Expansion of the universe - Wikipedia
The expansion of the universe is the increase in distance between gravitationally unbound parts of the observable universe with time. It is an intrinsic expansion; the universe does not expand "into" anything and does not require space to exist...
https://en.wikipedia.org/wiki/Expansion_of_the_universe
expansion | Infoplease
Webexpansion, in physics, increase in volume resulting from an increase in temperature. Contraction is the reverse process. When heat is applied to a body, the rate of vibration …
https://www.infoplease.com/encyclopedia/science/physics/concepts/expansion
Expansion | Encyclopedia.com
Webexpansion Change in the size of an object with change in temperature. Most substances expand on heating, although there are exceptions (ice expands on cooling). The …
https://www.encyclopedia.com/science-and-technology/physics/physics/expansion
The mystery of how big our Universe really is - BBC …
Over a century since Hubble's first estimate for the rate of cosmic expansion, that number has been revised downwards time and time again. Today's estimates put it at somewhere between 67 and 74 ...
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Expansion, and contraction | Nature Physics
WebThe expanding academic world of 1950–1970 created posts for the exploding number of new science PhDs, whose research led to the founding of journals, the acquisition of …
https://www.nature.com/articles/nphys579
Big Bang - Wikipedia
WebAstronomy portal. v. t. e. The Big Bang event is a physical theory that describes how the universe expanded from an initial state of high density and temperature. [1] Various cosmological models of the Big Bang …
https://en.wikipedia.org/wiki/Big_Bang
What are Thermal Contraction & Expansion? - Study.com
Area thermal expansion refers to the expansion in two dimensions (e.g., length and width), while volume thermal expansion is the expansion in three dimensions …
https://study.com/learn/lesson/thermal-contraction-expansion.html
How does the Universe expand? - Space Science for Kids
Scientists think the edge of the universe is expanding faster than the speed of light! How big is the Universe? It’s hard to imagine just how big the universe is. Scientists estimate that there are around 100 …
https://www.science-sparks.com/how-does-the-universe-expand/
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