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teacher background knowledge energy
... of other types of changes and identify the type of energy involved in these changes. This definition gives us an idea about energy, but it is incomplete. A more precise definition of energy is the ability to do work. In order to fully understand this definition, we must first understand what work is ...
... of other types of changes and identify the type of energy involved in these changes. This definition gives us an idea about energy, but it is incomplete. A more precise definition of energy is the ability to do work. In order to fully understand this definition, we must first understand what work is ...
Unit 2 Lesson 1 Introduction to Energy Essential Question: What is
... has due to its position, condition, or chemical composition. ...
... has due to its position, condition, or chemical composition. ...
Lesson Plans 083115 - Northside Middle School
... changed from one form to another, or transferred from one place to another. By the end of this unit of study students should demonstrate a conceptual understanding of how matter is made of tiny particles called atoms, and that all matter contains energy that can be transferred or transformed, but no ...
... changed from one form to another, or transferred from one place to another. By the end of this unit of study students should demonstrate a conceptual understanding of how matter is made of tiny particles called atoms, and that all matter contains energy that can be transferred or transformed, but no ...
Galaxies - senwiki
... that nothing, not even light, can escape. -Why? Black holes have extremely strong gravitational pulls. They can pull in stars and accumulate the mass of the stars. -Where are black holes located? Astronomers believe that each galaxy contains at least one supermassive black hole at its centre. ...
... that nothing, not even light, can escape. -Why? Black holes have extremely strong gravitational pulls. They can pull in stars and accumulate the mass of the stars. -Where are black holes located? Astronomers believe that each galaxy contains at least one supermassive black hole at its centre. ...
Rotation Curves:
... seen out to larger distances (and the converse is true for objects that are fainter than average). • Any flux limited sample will contain more brighter-than average objects than fainter-than-average objects. • The “average” brightness for objects in the sample will be brighter than the true “average ...
... seen out to larger distances (and the converse is true for objects that are fainter than average). • Any flux limited sample will contain more brighter-than average objects than fainter-than-average objects. • The “average” brightness for objects in the sample will be brighter than the true “average ...
Learning goals for Astronomy`s Final 2013
... Describe light spectroscopy as a method used by Astronomers to find the composition of different celestial objects o Students will be able to use emission spectra to find the composition of a star. o Be able to make connections between Kirchoff’s law (elements absorb electromagnetic energy at the sa ...
... Describe light spectroscopy as a method used by Astronomers to find the composition of different celestial objects o Students will be able to use emission spectra to find the composition of a star. o Be able to make connections between Kirchoff’s law (elements absorb electromagnetic energy at the sa ...
SF Lesson Plans 083115
... changed from one form to another, or transferred from one place to another. By the end of this unit of study students should demonstrate a conceptual understanding of how matter is made of tiny particles called atoms, and that all matter contains energy that can be transferred or transformed, but no ...
... changed from one form to another, or transferred from one place to another. By the end of this unit of study students should demonstrate a conceptual understanding of how matter is made of tiny particles called atoms, and that all matter contains energy that can be transferred or transformed, but no ...
Galaxies
... clusters of galaxies? – Masses measured from galaxy motions, temperature of hot gas, and gravitational lensing all indicate that the vast majority of matter in clusters is dark ...
... clusters of galaxies? – Masses measured from galaxy motions, temperature of hot gas, and gravitational lensing all indicate that the vast majority of matter in clusters is dark ...
The Oscillating Universe Theory - Scientific Research Publishing
... spectrum of elementary particles from the unified point of view. Consideration of problems of the gravitational optics and dark matter is developing from the solid crystal model for the vacuum. The vacuum is represented as a three-dimensional crystal lattice matter with a very small lattice period, ...
... spectrum of elementary particles from the unified point of view. Consideration of problems of the gravitational optics and dark matter is developing from the solid crystal model for the vacuum. The vacuum is represented as a three-dimensional crystal lattice matter with a very small lattice period, ...
Ellipticity, Its Origin and Progression in Comoving Galaxies
... expanding. Furthermore, the new-cosmology argument includes incontrovertible proof that our Cosmos is intrinsically cellularly structured, contrary to the view of mere phenomenological cellularity. A remarkable 2009 paper [6] entitled, “The Story of Gravity and Lambda —How the Theory of Heraclitus S ...
... expanding. Furthermore, the new-cosmology argument includes incontrovertible proof that our Cosmos is intrinsically cellularly structured, contrary to the view of mere phenomenological cellularity. A remarkable 2009 paper [6] entitled, “The Story of Gravity and Lambda —How the Theory of Heraclitus S ...
What is energy?
... • On Earth the acceleration of gravity is 9.8 m/s2, and has the symbol g. • Like all forms of energy, gravitational potential energy is measured in joules. ...
... • On Earth the acceleration of gravity is 9.8 m/s2, and has the symbol g. • Like all forms of energy, gravitational potential energy is measured in joules. ...
Section 6 The Expanding Universe The Doppler Effect
... microwave background (CMB). It is an irony that it was Hoyle who coined the name that would come to be applied to Lemaître’s theory, referring to it as ‘this big bang idea’ in derision during a 1950 BBC radio broadcast. For a while support was split between these two theories. Eventually, the observ ...
... microwave background (CMB). It is an irony that it was Hoyle who coined the name that would come to be applied to Lemaître’s theory, referring to it as ‘this big bang idea’ in derision during a 1950 BBC radio broadcast. For a while support was split between these two theories. Eventually, the observ ...
The Electric Universe by Wallace Thornhill and David Talbott
... Raised in Portland, Oregon, David Talbott has remained in the area all his life. A graduate of Portland State University, where he majored in education and political science, he returned briefly for graduate work in urban studies. His college observations on the failure of modern education led him t ...
... Raised in Portland, Oregon, David Talbott has remained in the area all his life. A graduate of Portland State University, where he majored in education and political science, he returned briefly for graduate work in urban studies. His college observations on the failure of modern education led him t ...
Eternal inflation and its implications
... The eternal nature of new inflation was first discovered by Steinhardt [22], and later that year Vilenkin [23] showed that new inflationary models are generically eternal. Although the false vacuum is a metastable state, the decay of the false vacuum is an exponential process, very much like the dec ...
... The eternal nature of new inflation was first discovered by Steinhardt [22], and later that year Vilenkin [23] showed that new inflationary models are generically eternal. Although the false vacuum is a metastable state, the decay of the false vacuum is an exponential process, very much like the dec ...
STUDENT GUIDE
... Energy which states that energy can neither be created nor destroyecl, it just "chanÿJ f-ges form. Energy transformationÿiÿstems demÿ6nstrate the Law ...
... Energy which states that energy can neither be created nor destroyecl, it just "chanÿJ f-ges form. Energy transformationÿiÿstems demÿ6nstrate the Law ...
PH607 – Galaxies
... were < 2 Mpc away but his basic conclusion has not changed as more and more galaxies at larger distances have been observed. We live in an expanding Universe. Due to the Big Bang, the Universe is expanding. Hubble found that there was a direct linear relation between distance and redshift: the furth ...
... were < 2 Mpc away but his basic conclusion has not changed as more and more galaxies at larger distances have been observed. We live in an expanding Universe. Due to the Big Bang, the Universe is expanding. Hubble found that there was a direct linear relation between distance and redshift: the furth ...
Energy: Forms and Changes
... object that is not moving appears to have no energy because it is doing nothing. However, the object has “potential” energy. It can move, fall, be thrown, and so forth. For examples, a ball at rest on the top of a hill has the potential energy to roll down that hall. Potential energy is stored in ob ...
... object that is not moving appears to have no energy because it is doing nothing. However, the object has “potential” energy. It can move, fall, be thrown, and so forth. For examples, a ball at rest on the top of a hill has the potential energy to roll down that hall. Potential energy is stored in ob ...
Galaxies
... • Origin, early history, and fate of the Universe • Does the Universe have a beginning? An end? What physics processes “caused” the Universe to be what it is? Are other universes possible? Would they look like ours (have the ...
... • Origin, early history, and fate of the Universe • Does the Universe have a beginning? An end? What physics processes “caused” the Universe to be what it is? Are other universes possible? Would they look like ours (have the ...
Potential energy - Peoria Public Schools
... has due to its position, condition, or chemical composition. ...
... has due to its position, condition, or chemical composition. ...
Dark energy
![](https://commons.wikimedia.org/wiki/Special:FilePath/Dark_Energy.jpg?width=300)
In physical cosmology and astronomy, dark energy is an unknown form of energy which is hypothesized to permeate all of space, tending to accelerate the expansion of the universe. Dark energy is the most accepted hypothesis to explain the observations since the 1990s indicating that the universe is expanding at an accelerating rate. Assuming that the standard model of cosmology is correct, the best current measurements indicate that dark energy contributes 68.3% of the total energy in the present-day observable universe. The mass–energy of dark matter and ordinary matter contribute 26.8% and 4.9%, respectively, and other components such as neutrinos and photons contribute a very small amount. Again on a mass–energy equivalence basis, the density of dark energy (6.91 × 10−27 kg/m3) is very low, much less than the density of ordinary matter or dark matter within galaxies. However, it comes to dominate the mass–energy of the universe because it is uniform across space.Two proposed forms for dark energy are the cosmological constant, a constant energy density filling space homogeneously, and scalar fields such as quintessence or moduli, dynamic quantities whose energy density can vary in time and space. Contributions from scalar fields that are constant in space are usually also included in the cosmological constant. The cosmological constant can be formulated to be equivalent to vacuum energy. Scalar fields that do change in space can be difficult to distinguish from a cosmological constant because the change may be extremely slow.High-precision measurements of the expansion of the universe are required to understand how the expansion rate changes over time and space. In general relativity, the evolution of the expansion rate is parameterized by the cosmological equation of state (the relationship between temperature, pressure, and combined matter, energy, and vacuum energy density for any region of space). Measuring the equation of state for dark energy is one of the biggest efforts in observational cosmology today.Adding the cosmological constant to cosmology's standard FLRW metric leads to the Lambda-CDM model, which has been referred to as the ""standard model of cosmology"" because of its precise agreement with observations. Dark energy has been used as a crucial ingredient in a recent attempt to formulate a cyclic model for the universe.