What Does Expansion Mean In Science?

What does expansion mean?

noun. the act of expanding or the state of being expanded. something expanded; an expanded surface or part. the degree, extent, or amount by which something expands. an increase, enlargement, or development, esp in the activities of a company.

What is expansion Short answer?

Expansion is the process of becoming greater in size, number, or amount.

What is the example of expansion?

Table shows some examples of expansion. Railway tracks consist of two parallel metal rails joined together. Small gaps, called expansion gaps, are deliberately left between the rails as there is an expansion of the rails in hot weather. Water expands on heating.

What is the process of expansion?

Compression is a process under which volume of the system is gradually reduced, pressure and temperature increases where heat transfer may or may not be possible. While in expansion process volume is gradually decrease with the decrease in pressure and temperature and heat transfer may or may not be possible.

What is an expansion in the economy?

Expansion, in economics, an upward trend in the business cycle, characterized by an increase in production and employment, which in turn causes an increase in the incomes and spending of households and businesses.

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What is expansion in science for Class 6?

Expansion: A process in which an object becomes bigger in size, e.g., metals expand on heating. Melting: A process in which a solid melts to become a liquid on heating is called melting.

What is another word for expansion?

What is another word for expansion?

growth enlargement
rise swell
advance advancement
amplification buildout
burgeoning diffusion

What is expansion in sentence?

1 The company intends a slow-down in expansion. 2 The company was now set for major expansion. 3 Their much-touted expansion plans have come to nothing. 4 Expansion was made possible by the investment of government money. 5 The rapid expansion of cities can cause social and economic problems.

What are 2 examples of thermal expansion?

Here are five examples:

  • If you have ever tried to unscrew a stuck lid off a glass jar, you’ll appreciate this expansion effect.
  • Bridges have a long span and in hot weather the materials that the bridge is made of will expand.
  • A liquid, when heated, will expand and can be made to rise up a tube.

What are the three types of thermal expansion?

Thermal expansion describes the tendency of an object to change its dimension either in length, area or volume due to heat. Heating up a substance increases its kinetic energy. Depending on the type of expansion thermal expansion is of 3 types – Linear expansion, Area expansion, and Volume expansion.

Where is expansion useful?

The difference in expansion causes the bimetallic strip to bend when the temperature is changed. This movement has many common uses including: thermostats to control temperature, oven thermometers to measure temperature, and switches to regulate toasters.

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Why is no work done in free expansion?

The gas expands on its own without external pressure acting on it. So according to the equation of work in thermodynamics W=Pext Δ V. Since external pressure is zero, the work done during the free expansion is zero.

What is work expansion?

When a gas expands it does work on its surroundings. That work is equal to the area under the curve on a P-V diagram which describes that expansion.

What caused expansion?

Expansion may be caused by factors external to the economy, such as weather conditions or technical change, or by factors internal to the economy, such as fiscal policies, monetary policies, the availability of credit, interest rates, regulatory policies or other impacts on producer incentives.

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