![A time travel of 14 billion years](http://s1.studyres.com/store/data/016911792_1-dba71acbced52bdbbc08d08b37647da9-300x300.png)
A time travel of 14 billion years
... big bang’s remainders that we are not (yet) able to detect: -The background neutrinos that provide a picture of the universe a second after its birth. - The gravitational waves that provide a picture of the universe at 10-43 seconds after the Big Bang. ...
... big bang’s remainders that we are not (yet) able to detect: -The background neutrinos that provide a picture of the universe a second after its birth. - The gravitational waves that provide a picture of the universe at 10-43 seconds after the Big Bang. ...
Review for Chapter 5 and 6 Test
... 22. Is energy a scalar or a vector? Scalar 23. Is weight a force or a mass measurement? Force ...
... 22. Is energy a scalar or a vector? Scalar 23. Is weight a force or a mass measurement? Force ...
File
... If there is no distance, there is no work done. If dealing with lifting an object up, multiply the mass by gravity to get the Force needed to use the W = Fd formula. ...
... If there is no distance, there is no work done. If dealing with lifting an object up, multiply the mass by gravity to get the Force needed to use the W = Fd formula. ...
Tutorial 4 - UniMAP Portal
... 3. A sack of mass 5kg was pushed 10m horizontally away from its origin by a force 7 Newton. Calculate how much work had been done on the sack? 4. A force 50N, acts continuously on a crate to displace it by 3.0m. Calculate how much work had been done on the crate? 5. A space vehicle weighting 40 kg t ...
... 3. A sack of mass 5kg was pushed 10m horizontally away from its origin by a force 7 Newton. Calculate how much work had been done on the sack? 4. A force 50N, acts continuously on a crate to displace it by 3.0m. Calculate how much work had been done on the crate? 5. A space vehicle weighting 40 kg t ...
Gravitational potential energy
... Of the four fundamental forces; the strong nuclear force, the weak nuclear force, the electromagnetic force, gravity has the most influence on our everyday life. It is responsible for the formation of stars, planets and galaxies. It keeps us from floating into space. Yet, gravity is the weakest of t ...
... Of the four fundamental forces; the strong nuclear force, the weak nuclear force, the electromagnetic force, gravity has the most influence on our everyday life. It is responsible for the formation of stars, planets and galaxies. It keeps us from floating into space. Yet, gravity is the weakest of t ...
The Expanding Universe
... Hubble Expansion Law 1929, Edwin Hubble announced that almost all galaxies appeared to be moving away from us. This phenomenon was observed as a redshift of a galaxy's spectrum. This redshift appeared to have a larger displacement for faint, presumably further, galaxies. Hence, the farther a galaxy ...
... Hubble Expansion Law 1929, Edwin Hubble announced that almost all galaxies appeared to be moving away from us. This phenomenon was observed as a redshift of a galaxy's spectrum. This redshift appeared to have a larger displacement for faint, presumably further, galaxies. Hence, the farther a galaxy ...
SUFFOLK COUNTY COMMUNITY COLLEGE
... To introduce the student to those topics that students are traditionally fascinated with, but are only briefly mentioned in ES22-Astronomy of Stars and Galaxies, such as relativity, time travel, exotic star death, black holes, and the origins and death of the universe, and show how these ideas have ...
... To introduce the student to those topics that students are traditionally fascinated with, but are only briefly mentioned in ES22-Astronomy of Stars and Galaxies, such as relativity, time travel, exotic star death, black holes, and the origins and death of the universe, and show how these ideas have ...
PHYSICS 113 Assignment #9 SOLUTIONS Chapter 17 13. Starting
... particles in the gas causes the gas to radiate energy at all wavelengths in the EM spectrum. It is this radiation from the hot gas that we see as the tremendous outpouring of energy from quasars. ...
... particles in the gas causes the gas to radiate energy at all wavelengths in the EM spectrum. It is this radiation from the hot gas that we see as the tremendous outpouring of energy from quasars. ...
Energy
... Identify the relevant points in the problem At one point is you know enough to calculate the energy, at the other point you want to know something. Write down the conservation of energy formula Write down the forms of energy at each point. Substitute in the formulas for each type of energ ...
... Identify the relevant points in the problem At one point is you know enough to calculate the energy, at the other point you want to know something. Write down the conservation of energy formula Write down the forms of energy at each point. Substitute in the formulas for each type of energ ...
1. a) Astronomers use the parallax method to measure
... 1. a) Astronomers use the parallax method to measure the distance to nearby stars, but we can’t use it to measure the distance to stars in other galaxies. Why not? Why isn’t the parallax method useful for measuring the distances to stars in other galaxies? They are so distant that the parallax is to ...
... 1. a) Astronomers use the parallax method to measure the distance to nearby stars, but we can’t use it to measure the distance to stars in other galaxies. Why not? Why isn’t the parallax method useful for measuring the distances to stars in other galaxies? They are so distant that the parallax is to ...
Section 3 What is energy? Energy “Ability to do work” Anything that
... What is energy? Energy “Ability to do work” Anything that causes change must have energy. SI unit for all energies Joules (J) Potential Energy Even motionless objects can have energy Stored energy due to position, shape, or condition Energy of Position Elastic PE Energy stored by som ...
... What is energy? Energy “Ability to do work” Anything that causes change must have energy. SI unit for all energies Joules (J) Potential Energy Even motionless objects can have energy Stored energy due to position, shape, or condition Energy of Position Elastic PE Energy stored by som ...
04 Astrophysics_-_lesson_4 cosmology
... The Big Bang Model is a broadly accepted theory for the origin and evolution of our universe. It postulates that 12 to 14 billion years ago, the portion of the universe we can see today was only a few millimetres across. It has since expanded from this hot dense state into the vast and much cooler c ...
... The Big Bang Model is a broadly accepted theory for the origin and evolution of our universe. It postulates that 12 to 14 billion years ago, the portion of the universe we can see today was only a few millimetres across. It has since expanded from this hot dense state into the vast and much cooler c ...
Things to know: This meant as a guide to what you should know. I
... The speed of light is the same for all inertial reference frames. What unusual distortions in time and space are experienced when one moves at speeds near the speed of light? What is gravity in Einstein’s general theory of relativity? What is all matter made of (what are leptons, baryons, quarks)? W ...
... The speed of light is the same for all inertial reference frames. What unusual distortions in time and space are experienced when one moves at speeds near the speed of light? What is gravity in Einstein’s general theory of relativity? What is all matter made of (what are leptons, baryons, quarks)? W ...
Name________________ Astronomy I cans 1. What is the Big Bang
... 4. What is evidence that the Big Bang occurred? ...
... 4. What is evidence that the Big Bang occurred? ...
Astronomy
... 10-15 billion years old (Earth is 4.6 billion years old) Where do we think the universe came from/how did it form? ...
... 10-15 billion years old (Earth is 4.6 billion years old) Where do we think the universe came from/how did it form? ...
Physical Science Worksheet: Energy Short Answer 1. The kinetic
... The kinetic energy of an object increases as its ____ increases. Increasing the speed of an object ____ its potential energy. The SI unit for energy is the ____. You can calculate kinetic energy by using the equation ____. According to the law of conservation of energy, the total amount of energy in ...
... The kinetic energy of an object increases as its ____ increases. Increasing the speed of an object ____ its potential energy. The SI unit for energy is the ____. You can calculate kinetic energy by using the equation ____. According to the law of conservation of energy, the total amount of energy in ...
runaway - Astronomy & Astrophysics Group
... “I have observed the nature and the material of the Milky Way. With the aid of the telescope this has been scrutinized so directly and with such ocular certainty that all the disputes which have vexed philosophers through so many ages have been resolved, and we are at last freed from wordy debates a ...
... “I have observed the nature and the material of the Milky Way. With the aid of the telescope this has been scrutinized so directly and with such ocular certainty that all the disputes which have vexed philosophers through so many ages have been resolved, and we are at last freed from wordy debates a ...
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.