Order of Magnitude Icebreaker
... ★ Do not hesitate to simplify as much as possible ★ Rescale to situations you are familiar with ★ Basic physics can give good insight on many problems! ...
... ★ Do not hesitate to simplify as much as possible ★ Rescale to situations you are familiar with ★ Basic physics can give good insight on many problems! ...
Word
... Galaxies are separated in distance units of megaparsecs (Mpc), where 1Mpc = 1 million parsec = 3.26 million ly. To determine distances of this magnitude, astronomers look for Cepheid variable stars in galaxies. After measuring the period and apparent magnitude of the Cepheid variables, they can dete ...
... Galaxies are separated in distance units of megaparsecs (Mpc), where 1Mpc = 1 million parsec = 3.26 million ly. To determine distances of this magnitude, astronomers look for Cepheid variable stars in galaxies. After measuring the period and apparent magnitude of the Cepheid variables, they can dete ...
Galaxies
... Galaxies are separated in distance units of megaparsecs (Mpc), where 1Mpc = 1 million parsec = 3.26 million ly. To determine distances of this magnitude, astronomers look for Cepheid variable stars in galaxies. After measuring the period and apparent magnitude of the Cepheid variables, they can dete ...
... Galaxies are separated in distance units of megaparsecs (Mpc), where 1Mpc = 1 million parsec = 3.26 million ly. To determine distances of this magnitude, astronomers look for Cepheid variable stars in galaxies. After measuring the period and apparent magnitude of the Cepheid variables, they can dete ...
PPT
... seen over great distances These stars are excellent standard candles because of a relationship between their average luminosity and their period of variation, thus … ...
... seen over great distances These stars are excellent standard candles because of a relationship between their average luminosity and their period of variation, thus … ...
Document
... 1960 his knowledge had grown sixteenfold, and by the year 2000 it was a hundred times what it had been a century previously. The second part of the twentieth century brought a number of technical innovations, which are still very young but which are taken so much for granted that it is as if they ha ...
... 1960 his knowledge had grown sixteenfold, and by the year 2000 it was a hundred times what it had been a century previously. The second part of the twentieth century brought a number of technical innovations, which are still very young but which are taken so much for granted that it is as if they ha ...
presentation (PPT format)
... galaxy, the average motion and how the galaxy brightness will appear distributed: this is called fundamental plane Measuring 2 quantities we can get the actual size of the galaxy and by the apparent size get the distance ...
... galaxy, the average motion and how the galaxy brightness will appear distributed: this is called fundamental plane Measuring 2 quantities we can get the actual size of the galaxy and by the apparent size get the distance ...
Slides for Objects in Motion
... along and pushes back the plane, it increases the energy of the plane. The assistance truck is essentially doing work on the plane. ...
... along and pushes back the plane, it increases the energy of the plane. The assistance truck is essentially doing work on the plane. ...
Studying the Universe Studying the Universe
... specific definitions based on astronomy. A year is the time required for the Earth to revolve once around the sun. A month is roughly the amount of time required for the moon to revolve once around the Earth. A day is the time required for the Earth to rotate once on its axis. In the early Roman cal ...
... specific definitions based on astronomy. A year is the time required for the Earth to revolve once around the sun. A month is roughly the amount of time required for the moon to revolve once around the Earth. A day is the time required for the Earth to rotate once on its axis. In the early Roman cal ...
Neutron Stars
... the highest densities of cold matter in the universe. Combining laboratory experiments with observations of neutron stars will constrain the equation of state of relatively cold and dense matter. In addition, neutron stars are also laboratories for testing general relativity theory. ...
... the highest densities of cold matter in the universe. Combining laboratory experiments with observations of neutron stars will constrain the equation of state of relatively cold and dense matter. In addition, neutron stars are also laboratories for testing general relativity theory. ...
Gravity, entropy, and cosmology: in search of clarity - Philsci
... And we should expect the same to be true of gravity. A gravitating system differs from a non-gravitating one both because of the degrees of freedom associated with the gravitational field (i. e. , the spacetime metric) and because gravitational interactions change the dynamical properties of the sys ...
... And we should expect the same to be true of gravity. A gravitating system differs from a non-gravitating one both because of the degrees of freedom associated with the gravitational field (i. e. , the spacetime metric) and because gravitational interactions change the dynamical properties of the sys ...
Gravity, Entropy, and Cosmology: In Search of Clarity
... And we should expect the same to be true of gravity. A gravitating system differs from a non-gravitating one both because of the degrees of freedom associated with the gravitational field (i. e. , the spacetime metric) and because gravitational interactions change the dynamical properties of the sys ...
... And we should expect the same to be true of gravity. A gravitating system differs from a non-gravitating one both because of the degrees of freedom associated with the gravitational field (i. e. , the spacetime metric) and because gravitational interactions change the dynamical properties of the sys ...
PH607lec12
... Though many astronomers agree that hierarchical formation seems to be occurring, there are still some wrinkles to the theory. For example, the very most massive galaxies don't seem to be growing at as high a rate as middle-mass galaxies. When astronomers look at the brightest galaxies now compared t ...
... Though many astronomers agree that hierarchical formation seems to be occurring, there are still some wrinkles to the theory. For example, the very most massive galaxies don't seem to be growing at as high a rate as middle-mass galaxies. When astronomers look at the brightest galaxies now compared t ...
Follow these Examples of Energy Conversion
... the street in your car, the car has kinetic energy because it is moving. If you take your foot off of the gas pedal, the car will eventually come to a stop. Did the energy gradually disappear? Is the energy “used up”? No, the energy that was in the form of kinetic energy was converted into thermal e ...
... the street in your car, the car has kinetic energy because it is moving. If you take your foot off of the gas pedal, the car will eventually come to a stop. Did the energy gradually disappear? Is the energy “used up”? No, the energy that was in the form of kinetic energy was converted into thermal e ...
Newtonian world and astrophysics 5.1 Thermal physics
... these vapour molecules, will also increase. Therefore, there will be more and harder collisions between the vapour molecules and the lid of the cup. Both of these factors will increase the pressure of the vapour within the cup. ...
... these vapour molecules, will also increase. Therefore, there will be more and harder collisions between the vapour molecules and the lid of the cup. Both of these factors will increase the pressure of the vapour within the cup. ...
Section 1 What Is Energy?
... • Potential energy is the energy an object has because of its position. • Elastic potential energy can be stored in objects like bowstrings, springs, and rubber bands. The energy put into stretching becomes elastic potential energy. • Gravitational Potential Energy The amount of gravitational potent ...
... • Potential energy is the energy an object has because of its position. • Elastic potential energy can be stored in objects like bowstrings, springs, and rubber bands. The energy put into stretching becomes elastic potential energy. • Gravitational Potential Energy The amount of gravitational potent ...
2013. CCAT. All Rights Reserved.
... We are developing X-Spec, a multi-object wide-band direct-detection spectrometer for CCAT. X-Spec is designed for rapid full-band (195-510 GHz), moderate resolution (R~700) spectral surveys of galaxies, measuring the bright atomic fine-structure and molecular rotational transitions which cool the in ...
... We are developing X-Spec, a multi-object wide-band direct-detection spectrometer for CCAT. X-Spec is designed for rapid full-band (195-510 GHz), moderate resolution (R~700) spectral surveys of galaxies, measuring the bright atomic fine-structure and molecular rotational transitions which cool the in ...
Supernovae
... but not for the luminosity of the expanding gas observed as a supernova Ia. The energy source for this is the slow radioactive decay sequence from the initially formed 56 Ni, which decays to 56 Co, which in turn decays to 56 Fe with a half-life of 77 days. The total optical energy observed can be ca ...
... but not for the luminosity of the expanding gas observed as a supernova Ia. The energy source for this is the slow radioactive decay sequence from the initially formed 56 Ni, which decays to 56 Co, which in turn decays to 56 Fe with a half-life of 77 days. The total optical energy observed can be ca ...
A lecture on SHM-Theory
... (1) Time period : It is the least interval of time after which the periodic motion of a body repeats itself. S.I. units of time period is second. (2) Frequency : It is defined as the number of periodic motions executed by body per second. S.I unit of frequency is hertz (Hz). (3) Angular Frequency : ...
... (1) Time period : It is the least interval of time after which the periodic motion of a body repeats itself. S.I. units of time period is second. (2) Frequency : It is defined as the number of periodic motions executed by body per second. S.I unit of frequency is hertz (Hz). (3) Angular Frequency : ...
Spacephysics - The summary
... has been found by the help of Hubble telescope pictures, proving the existential connections between both in Space physics n) the Big Bang has been accepted to be the process of a black hole (2003), although Space physics rejects the model of a Big Bang (because in Big Bang free energy is proposed a ...
... has been found by the help of Hubble telescope pictures, proving the existential connections between both in Space physics n) the Big Bang has been accepted to be the process of a black hole (2003), although Space physics rejects the model of a Big Bang (because in Big Bang free energy is proposed a ...
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.