### Butter, garage doors and SUVs: Why shortages remain common 2.5 years into the pandemic

Shortages of basic goods still plague the U.S. economy—2½ years after the pandemic's onset turned global supply chains upside down.

Shortages of basic goods still plague the U.S. economy—2½ years after the pandemic's onset turned global supply chains upside down.

Economics & Business

11 hours ago

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A quartet of researchers, two with the Nordic Institute for Theoretical Physics and two with Pukyong National University, has created a group of simulations of changes to the jet stream under global warming. In their paper ...

A groundbreaking mathematical equation that could transform medical procedures, natural gas extraction, and plastic packaging production in the future has been discovered.

Mathematics

Sep 06, 2022

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2395

Robin Hood would not even have had to become an outlaw if the markets had been more competitive and Nottingham's taxation office had known how to assess taxes efficiently.

Economics & Business

Jul 27, 2022

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Nanoscientists and theoretical physicists at UNSW Medicine & Health's EMBL Australia Node in Single Molecule Science joined forces to demystify the complicated mechanisms governing how quickly two matching strands of DNA ...

Molecular & Computational biology

Jul 27, 2022

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148

Understanding the human mind and behavior lies at the core of the discipline of psychology. But to characterize how people's behavior changes over time, I believe psychology alone is insufficient—and that additional mathematical ...

Mathematics

Jun 27, 2022

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Industry and federal efforts to alleviate a baby formula shortage in the U.S. are ramping up, with the import of foreign brands supplementing increased domestic production.

Economics & Business

Jun 08, 2022

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A baby formula shortage has added to the woes of American parents already confronted with the pressures of raising an infant during a pandemic in a country ranked low for family-friendly policies.

Economics & Business

May 13, 2022

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New Zealand is on the verge of eradicating a painful disease from its herd of 10 million cattle after a four-year campaign that has cost hundreds of millions of dollars and resulted in more than 175,000 cows being killed.

Agriculture

May 05, 2022

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Turbulence makes many people uneasy or downright queasy. And it's given researchers a headache, too. Mathematicians have been trying for a century or more to understand the turbulence that arises when a flow interacts with ...

General Physics

Nov 16, 2021

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686

In mathematics, a **formula** (plural: **formulae** or **formulas**) is an entity constructed using the symbols and formation rules of a given logical language.

In science, a formula is a concise way of expressing information symbolically (as in a mathematical or chemical formula), or a general relationship between quantities. Colloquial use of the term in mathematics often refers to a similar construct.

Such formulae are the key to solving an equation with variables. For example, determining the volume of a sphere requires a significant amount of integral calculus; but, having done this once, mathematicians can produce a formula to describe the volume in terms of some other parameter (the radius for example). This particular formula is:

Having obtained this result, and knowing the radius of the sphere in question, we can quickly and easily determine its volume. Note that the quantities *V*, the volume, and *r* the radius are expressed as single letters. This convention, while less important in a relatively simple formula, means that mathematicians can more quickly manipulate larger and more complex formulae.

Expressions are distinct from formulae in that they cannot contain an equals sign; whereas formulae are comparable to sentences, expressions are more like phrases.

In a general context, formulae are applied to provide a mathematical solution for real world problems. Some may be general: **F** = *m***a**, which is one expression of Newton's second law, is applicable to a wide range of physical situations. Other formulae may be specially created to solve a particular problem; for example, using the equation of a sine curve to model the movement of the tides in a bay. In all cases however, formulae form the basis for all calculations.

This text uses material from Wikipedia, licensed under CC BY-SA