Multiverse - Definition and Explanation

Multiverse - Definition and Explanation The multiverse is a theoretical framework in modern cosmology (and high energy physics) which presents the idea that there exist a vast array of potential universes which are actually manifest in some way. There are a number of different types of potential universes - the many worlds interpretation (MWI) of quantum physics, braneworlds predicted by string theory, and other more extravagant models - and so the parameters of exactly what constitutes the multiverse is different depending on whom you speak to. Its unclear how this theory can actually be applied scientifically, so its still controversial among many physicists. One application of the multiverse in modern discourse is a means of invoking the anthropic principle to explain the finely tuned parameters of our own universe without recourse to the need of an intelligent designer. As the argument goes, since we are here we know that the region of the multiverse in which we exist must, by definition, be one of the regions that have the parameters to allow us to exist. These finely tuned properties, therefore, require no more explanation than explaining why humans are born on land instead of under the ocean surface. Also Known As: multiple universe hypothesismegaversemeta-universeparallel worldsparallel universes Is the Multiverse real?   Theres solid physics supporting the idea the universe we know and love could be one of many. Partly this is because theres more than one way to make a multiverse. Take a look at five types of multiverses and how they could actually exist: Bubble Universes - Bubble universes are fairly easy to comprehend. In this theory, there could have been other Big Bang events, so far away from us that we cant conceive of the distances involved yet. If we consider our universe to consists of the galaxies created by a Big Bang, expanding outward, then eventually this universe might encounter another universe created much the same way. Or, maybe the distances involved are so vast these multiverses would never interact. Either way, it doesnt take a huge leap of imagination to see how bubble universes might exist.Multiverse from Repeating Universes - The repeating universe theory of multiverses is based on infinite space-time. If its infinite, then eventually the arrangement of particles will repeat themselves. In this theory, if you travel far enough, you would encounter another Earth and eventually another you.Braneworlds or Parallel Universes - According to this multiverse theory, the universe we perceive isnt all there is. There ar e additional dimensions beyond the three spatial dimensions we perceive, plus time. Other three-dimensional branes may co-exist in higher-dimension space, thus acting as parallel universes. Daughter Universes - Quantum mechanics describes the universe in terms of probabilities. In the quantum world, all possible outcomes of a choice or situation not only can occur but do occur. At every branch point, a new universe is created.Mathematical Universes - Mathematics is considered a tool used to describe the parameters of the universe. However, its possible there could be a different mathematical structure. If so, such a structure could describe a completely different sort of universe. Edited by Anne Marie Helmenstine, Ph.D.

Baking Powder Versus Baking Soda

Baking Powder Versus Baking Soda Are you planning some holiday baking? If so, you can use your knowledge of kitchen chemistry to save a trip to the store if you run out of ingredients. One substitution that can be confusing is whether or not you can use baking powder and baking soda interchangeably. Both baking powder and baking soda are used to help baked goods rise, but they arent the same chemicals. The Deal With Baking Soda Baking soda is sodium bicarbonate. If you dont have baking soda, you can use baking powder, but you will need to add about twice as much because baking powder contains baking soda, but it also contains other ingredients. This substitution may affect the flavor of the food, not necessarily in a negative way. If the recipe calls for salt (sodium chloride), you may want to use slightly less. The Deal With Baking Powder Baking powder is sodium bicarbonate and potassium bitartrate. If you dont have baking powder, you cant substitute baking soda, but you can make baking powder using two parts cream of tartar and one part baking soda. For example, two teaspoons of cream of tartar plus one teaspoon of baking soda would give you three teaspoons of baking powder. Unless the recipes states otherwise, begin baking as soon as you have finished mixing the ingredients, since the chemical reaction that causes the rising starts as soon as wet and dry ingredients are mixed. Tell me more...