Probing the Edge of the Solar System: Formation of
... •At about t = 1 second, temperature fell below 6 X 109 K, electrons and positions annihilated to form low energy gammaray photons that can not reverse the process •As a result, matter and anti-matter content decreased, and radiation content increased •From 1 second to 380,000 years, the universe is ...
... •At about t = 1 second, temperature fell below 6 X 109 K, electrons and positions annihilated to form low energy gammaray photons that can not reverse the process •As a result, matter and anti-matter content decreased, and radiation content increased •From 1 second to 380,000 years, the universe is ...
General Relativity and the Accelerated Expansion of the Universe
... standard candles to estimate their luminositydistances. To appreciate some of the far-reaching implications of their work, I have provided an elementary exposition of the general theory of relativity, accelerated expansion of the universe, luminosity-distance, SNe Ia and the cosmological constant pr ...
... standard candles to estimate their luminositydistances. To appreciate some of the far-reaching implications of their work, I have provided an elementary exposition of the general theory of relativity, accelerated expansion of the universe, luminosity-distance, SNe Ia and the cosmological constant pr ...
![cosmology[1] - KarenConnerEnglishIV](http://s1.studyres.com/store/data/002375580_1-efbe19cf7c791439d3765f11461d68f5-300x300.png)
cosmology[1] - KarenConnerEnglishIV
... how absolute magniitude seeing how fast they vary That enabled two different teams to measure the distance to each supernova. Distance is also an indicator of time since we observe a supernova 5 billion light years away as it appeared 5 billion years ago. They also measured the Supernova’s red shift ...
... how absolute magniitude seeing how fast they vary That enabled two different teams to measure the distance to each supernova. Distance is also an indicator of time since we observe a supernova 5 billion light years away as it appeared 5 billion years ago. They also measured the Supernova’s red shift ...
How to Calculate Kinetic Energy
... 5.4 Regular Problem A crane lifts a 50-kg crate so that the crate’s speed increases from 0 m/s to 5.0 m/s over a vertical distance of 10.0 m. Draw a bar chart representing this process. What is the force that the crane exerts on the crate? Specify the system, its initial and final states, and any a ...
... 5.4 Regular Problem A crane lifts a 50-kg crate so that the crate’s speed increases from 0 m/s to 5.0 m/s over a vertical distance of 10.0 m. Draw a bar chart representing this process. What is the force that the crane exerts on the crate? Specify the system, its initial and final states, and any a ...
History of the Universe and Solar System
... Is the Universe 20 BY old? No, gravitational forces have slowed down the galaxies since the Big Bang. (Note: Recent observations suggest this was the case for the first 2/3 of the Universe’s history. The expansion rate now seems to have increased for the last 1/3 of the Universe’s history. This is e ...
... Is the Universe 20 BY old? No, gravitational forces have slowed down the galaxies since the Big Bang. (Note: Recent observations suggest this was the case for the first 2/3 of the Universe’s history. The expansion rate now seems to have increased for the last 1/3 of the Universe’s history. This is e ...
AGN-Hubble
... Their separation only increases because the amount of space between them increases. The scale of the Universe increases, but not the scale of particles, galaxies, or even clusters (anything bound). The expansion is only apparent on scales of millions of light years. ...
... Their separation only increases because the amount of space between them increases. The scale of the Universe increases, but not the scale of particles, galaxies, or even clusters (anything bound). The expansion is only apparent on scales of millions of light years. ...
matter, energy, and Life PPT
... All living systems absorb energy from their surroundings and use it to organize and reorganize molecules within their cells & to power movement. ...
... All living systems absorb energy from their surroundings and use it to organize and reorganize molecules within their cells & to power movement. ...
Which of the following is the best description of an Sc galaxy? A) a
... the universe was once denser than it now is ...
... the universe was once denser than it now is ...
Written in the stars THE NOBEL PRIZE IN PHYSICS 2011
... So what is it that is speeding up the Universe? It is called dark energy and is a challenge for physics, a riddle that no one has managed to solve yet. Several ideas have been proposed. The simplest is to reintroduce Einstein’s cosmological constant, which he once rejected. At that time, he inserted ...
... So what is it that is speeding up the Universe? It is called dark energy and is a challenge for physics, a riddle that no one has managed to solve yet. Several ideas have been proposed. The simplest is to reintroduce Einstein’s cosmological constant, which he once rejected. At that time, he inserted ...
Unit 9 Test Review – Work and Energy
... 5. A 50.0 kg diver steps off a diving board and drops straight down into the water. The water provides an average net force of resistance of 1500 N to the diver’s fall. If the diver comes to rest 5.0 m below the water’s surface, what is the total distance between the diving board and the diver’s sto ...
... 5. A 50.0 kg diver steps off a diving board and drops straight down into the water. The water provides an average net force of resistance of 1500 N to the diver’s fall. If the diver comes to rest 5.0 m below the water’s surface, what is the total distance between the diving board and the diver’s sto ...
Targets: * I can identify different forms of energy. (Review Quizlet
... Categorize each energy form as Potential, Kinetic or Both ...
... Categorize each energy form as Potential, Kinetic or Both ...
Energy of a charged sphere
... a) We build up the sphere by adding subsequent infinitesimal layers of charge (carried from infinite distance). From Gauss’s theorem we know that, for an uniformly charged sphere having charge density ρ, radius r, and total charge q = q(r) = ρ(4πr3 /3), the field and the potential outside the sphere ...
... a) We build up the sphere by adding subsequent infinitesimal layers of charge (carried from infinite distance). From Gauss’s theorem we know that, for an uniformly charged sphere having charge density ρ, radius r, and total charge q = q(r) = ρ(4πr3 /3), the field and the potential outside the sphere ...
final review sheet
... 4) A not so smart stanfurd student (will they ever learn?) claims that the universe had no beginning and that it will have no ending. She believes that in the steady-state universe hypothesized by Fred Hoyle. What evidence could you use from Astro 10 to prove this ignoramus wrong? Come us with at le ...
... 4) A not so smart stanfurd student (will they ever learn?) claims that the universe had no beginning and that it will have no ending. She believes that in the steady-state universe hypothesized by Fred Hoyle. What evidence could you use from Astro 10 to prove this ignoramus wrong? Come us with at le ...
Conservation of Energy
... Conservation of Energy • Energy will always be energy, no matter what form it is in • Energy can be transferred from one type of energy to another • Potential Energy to Kinetic Energy • Kinetic Energy to Heat Energy • Heat Energy to Light Energy etc….. Any examples? ...
... Conservation of Energy • Energy will always be energy, no matter what form it is in • Energy can be transferred from one type of energy to another • Potential Energy to Kinetic Energy • Kinetic Energy to Heat Energy • Heat Energy to Light Energy etc….. Any examples? ...
The Nature of Energy Worksheet
... level surface at constant speed 3.Rock at the edge of a cliff 4.Wound-up watch spring 5.A leaf falling from a tree Directions: Write the letter next to each definition that best describes the term. Definition ...
... level surface at constant speed 3.Rock at the edge of a cliff 4.Wound-up watch spring 5.A leaf falling from a tree Directions: Write the letter next to each definition that best describes the term. Definition ...
Integrative Studies 410 Our Place in the Universe
... faster it rotates the wider the spectral lines are • Measuring rotation speed allows us to estimate luminosity; comparing to observed (apparent) brightness then tells us the distance ...
... faster it rotates the wider the spectral lines are • Measuring rotation speed allows us to estimate luminosity; comparing to observed (apparent) brightness then tells us the distance ...
Presentation
... • Mechanical – Energy associated with the movement of objects. • Gravitational – Energy associated with a gravitational field. • Elastic – Energy stored in the configuration of material that is released as it is distorted. ...
... • Mechanical – Energy associated with the movement of objects. • Gravitational – Energy associated with a gravitational field. • Elastic – Energy stored in the configuration of material that is released as it is distorted. ...
Post-class version
... we give it a name anyway: dark energy. Dark energy is a property of space itself, even in vacuum. If we assume the dark energy has certain properties, then it has the equivalent of enough mass to bring the average density of the universe up to the critical value. (Remember ...
... we give it a name anyway: dark energy. Dark energy is a property of space itself, even in vacuum. If we assume the dark energy has certain properties, then it has the equivalent of enough mass to bring the average density of the universe up to the critical value. (Remember ...
Dark energy
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.