[ fŭn′də-mĕn′tl ]
One of four forces that act between bodies of matter and that are mediated by one or more particles. In order of decreasing strength, the four fundamental forces are the strong force, the electromagnetic force, the weak force, and gravity. The particles associated with these forces, known as force carriers, are the gluon, the photon, the intermediate vector bosons (the Z boson and the W boson), and the graviton, respectively. Some scientists believe that the weak force and the electromagnetic force are both aspects of a single force called the electroweak force. Decay processes in which a subatomic particle is converted into other particles are mediated by the fundamental forces, which relate the decaying particle to the resulting particles; for example, beta decay is mediated by the weak force.
The Hardest Words To Spell Just Got A Whole Lot EasierTexts to mom. Emails to your boss. Resumes. Cover letters. Job applications. Orthography is everywhere, and, even if you're a master speller, most folks have that one word that has proven to be their spelling kryptonite. Now for a little good news. There's a secret to skirting those spelling speed bumps without revealing your fatal flaw: substitute a synonym.
Principal vs. PrincipleIs the head of a school called a principal or a principle? These two words are frustratingly similar, leaving even the most experienced English speakers to second-guess which word means what. Today, we’ll discuss the distinct meanings between these easy-to-confuse terms and a little trick to help differentiate between your principals and your principles. What is a principal? A principal is “a chief or head, …
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.