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Mar 30, 2022 · By definition, a force is a push or pull on an object, which has both magnitude and direction. In physics and other sciences, a force is a push or pull on a mass that can change the object’s motion.
Jul 3, 2017 · Look up definitions of chemistry words in this comprehensive A to Z chemistry dictionary. The glossary is organized alphabetically.
Jan 10, 2020 · In science, force is the push or pull on an object with mass that causes it to change velocity (to accelerate). Force represents as a vector, which means it has both magnitude and direction. In equations and diagrams, a force is usually denoted by the symbol F. An example is an equation from Newton's second law: F = m·a.
- Anne Marie Helmenstine, Ph.D.
Aug 22, 2024 · In the latter, compression is measured against the system’s volume at the standard pressure to which an organism is subjected—e.g., the pressure of the atmosphere at sea level is the standard, or reference, for most land animals, but the standard for deep-sea fishes and similar specialized forms is the normal pressure of their environment.
- The Editors of Encyclopaedia Britannica
• Chemistry The branch of science that studies the natural sciences which deal with the composition of substances, their properties and their chemical reactions with one another is called chemistry. It is derived from the Egyptian word keme that means ‘earth’.
Jan 20, 2022 · The pressure definition in science is force per unit area. Its usual units are newtons per square meter or Pascals. By definition, pressure is the perpendicular or normal force applied per unit area to a surface. Typical symbols for pressure are P or p.
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1) Enzyme repression is the mode by which the synthesis of an enzyme is prevented by repressor molecules. In many cases, the end product of a synthesis chain (e.g., an amino acid) acts as a feed-back corepressor by combining with an intracellular aporepressor protein, so that this complex is able to block the function of an operator.
