Order of Magnitude Icebreaker
... ★ Understand the basic but key ingredients ★ Obtain quick but reasonable answer ★ Approach: ★ Simplify as much as possible ...
... ★ Understand the basic but key ingredients ★ Obtain quick but reasonable answer ★ Approach: ★ Simplify as much as possible ...
Hubble`s Law and the Expansion Rate of the Universe
... There may be more than one galaxy in the image; the galaxy of interest is always the one closest to the center. To measure the size, click on opposite ends of the galaxy, at either end of the longest diameter. Try to find the farthest extents of the galaxy. If you make an error, make sure to cli ...
... There may be more than one galaxy in the image; the galaxy of interest is always the one closest to the center. To measure the size, click on opposite ends of the galaxy, at either end of the longest diameter. Try to find the farthest extents of the galaxy. If you make an error, make sure to cli ...
CH01.AST1001.F16.EDS
... • How did we come to be? – The matter in our bodies came from the Big Bang, which produced hydrogen and helium. – All other elements were constructed from H and He in stars and then recycled into new star systems, including our solar system. • How do our lifetimes compare to the age of the universe? ...
... • How did we come to be? – The matter in our bodies came from the Big Bang, which produced hydrogen and helium. – All other elements were constructed from H and He in stars and then recycled into new star systems, including our solar system. • How do our lifetimes compare to the age of the universe? ...
CH01.AST1001.S15.EDS
... • How did we come to be? – The matter in our bodies came from the Big Bang, which produced hydrogen and helium. – All other elements were constructed from H and He in stars and then recycled into new star systems, including our solar system. • How do our lifetimes compare to the age of the universe? ...
... • How did we come to be? – The matter in our bodies came from the Big Bang, which produced hydrogen and helium. – All other elements were constructed from H and He in stars and then recycled into new star systems, including our solar system. • How do our lifetimes compare to the age of the universe? ...
Lecture 2: A Modern View of the Universe
... – The farther away a galaxy is, the faster it is moving away from us – How is the observation made? From Doppler shift of spectral lines (will discuss in later lecture). » Color of light becomes redder if the object emitting the light is moving away from us. ...
... – The farther away a galaxy is, the faster it is moving away from us – How is the observation made? From Doppler shift of spectral lines (will discuss in later lecture). » Color of light becomes redder if the object emitting the light is moving away from us. ...
Lecture2.2014_v4 - UCO/Lick Observatory
... – The farther away a galaxy is, the faster it is moving away from us – How is the observation made? From Doppler shift of spectral lines (will discuss in later lecture). » Color of light becomes redder if the object emitting the light is moving away from us. ...
... – The farther away a galaxy is, the faster it is moving away from us – How is the observation made? From Doppler shift of spectral lines (will discuss in later lecture). » Color of light becomes redder if the object emitting the light is moving away from us. ...
EE 333 Electricity and Magnetism, Fall 2009 Homework #5 solution
... (a) The electric flux density, the electric field intensity, and the polarization in the two regions inside and the air outside the cable. (b) The polarization surface charge at ρ = a, and ρ = r1 . (c) The polarization charge density in region 2. The inner conductor is charged to a charge of ρl per ...
... (a) The electric flux density, the electric field intensity, and the polarization in the two regions inside and the air outside the cable. (b) The polarization surface charge at ρ = a, and ρ = r1 . (c) The polarization charge density in region 2. The inner conductor is charged to a charge of ρl per ...
Cosmological models, nonideal fluids and viscous forces in general relativity
... observations, after fixing a Friedmann metric as a background, are currently interpreted in terms of an almost spatially flat Universe dominated by a dark energy fluid, compatible with the cosmological constant term entering the Einstein equations, which in particular gives raise to an accelerated e ...
... observations, after fixing a Friedmann metric as a background, are currently interpreted in terms of an almost spatially flat Universe dominated by a dark energy fluid, compatible with the cosmological constant term entering the Einstein equations, which in particular gives raise to an accelerated e ...
Six thousand versus 14 Billion: How large and how old is the
... their job well. In the latest GAIA data release there are 2 million stars for which a reliable distance based on parallax measurements has been determined – a method that still only involves measuring angles. This is an excellent foundation to stand on for determining distances to even more star ...
... their job well. In the latest GAIA data release there are 2 million stars for which a reliable distance based on parallax measurements has been determined – a method that still only involves measuring angles. This is an excellent foundation to stand on for determining distances to even more star ...
transport theory
... Three ways are available to consider transport problems: 1. Approximating the form of the equation itself e.g. diffusion theory. 2. Consideration of model problems for which the form of the Transport Equation is ...
... Three ways are available to consider transport problems: 1. Approximating the form of the equation itself e.g. diffusion theory. 2. Consideration of model problems for which the form of the Transport Equation is ...
Cluster Analysis of Massive Datasets in Astronomy 1 Introduction
... Step 2 Identify connected components of the estimated level set Sbc by unions of open balls centered at Y(i) with radius n . This means that every given pair of Y(i) will be joined with a path consisting of a finite number of edges with length smaller than 2n . Cuevas et al. (2000) also suggested ...
... Step 2 Identify connected components of the estimated level set Sbc by unions of open balls centered at Y(i) with radius n . This means that every given pair of Y(i) will be joined with a path consisting of a finite number of edges with length smaller than 2n . Cuevas et al. (2000) also suggested ...
ppt - Harvard Condensed Matter Theory group
... Interference term is sensitive to the phase difference between k and p parts of the Cooper pair wavefunction and to the phases of Bragg pulses ...
... Interference term is sensitive to the phase difference between k and p parts of the Cooper pair wavefunction and to the phases of Bragg pulses ...
Genesis, Quantum Physics and Reality
... The problem of "who observes whom" is crucial. On the other hand, if a system is not observed, it is also "undisturbed" and behaves in a different way. This can be seen within the Wave-Particle Dualism. Every elementary particle (remember, all matter in the universe is made out of such particles) b ...
... The problem of "who observes whom" is crucial. On the other hand, if a system is not observed, it is also "undisturbed" and behaves in a different way. This can be seen within the Wave-Particle Dualism. Every elementary particle (remember, all matter in the universe is made out of such particles) b ...
Living Things - Fairfield-Suisun Unified School District
... in a spiral galaxy called the Milky Way. From the side, the Milky Way appears to be a narrow disk with a bulge in the middle. The galaxy’s spiral structure is visible only from above or below. ...
... in a spiral galaxy called the Milky Way. From the side, the Milky Way appears to be a narrow disk with a bulge in the middle. The galaxy’s spiral structure is visible only from above or below. ...
BelgradeCosmoJNJS
... Many traditional concepts how the Universe came into existence were based on religion myths and differed widely. Those cosmologies were scientifically unacceptable, but they provided a mental headstone that defined a shared reality for people. The challenge today is to take the new Universe picture ...
... Many traditional concepts how the Universe came into existence were based on religion myths and differed widely. Those cosmologies were scientifically unacceptable, but they provided a mental headstone that defined a shared reality for people. The challenge today is to take the new Universe picture ...
6 Big Bang Nucleosynthesis - Course Pages of Physics Department
... Only when deuterons are available can helium nuclei be formed, and so on. This process has “bottlenecks”: the lack of sufficient densities of lighter nuclei hinders the production of heavier nuclei, and prevents them from following their equilibrium abundances. As the temperature falls, the equilibr ...
... Only when deuterons are available can helium nuclei be formed, and so on. This process has “bottlenecks”: the lack of sufficient densities of lighter nuclei hinders the production of heavier nuclei, and prevents them from following their equilibrium abundances. As the temperature falls, the equilibr ...
Future stability of homogeneous cosmological models with matter
... coarse-graining, voids etc.] Warm-up for the other direction, where Λ is probably irrelevant Mathematically more difficult, since no exponential behavior The constant hides possibly interesting structure In general isotropization cannot be expected Late-time asymptotics are well understood for a per ...
... coarse-graining, voids etc.] Warm-up for the other direction, where Λ is probably irrelevant Mathematically more difficult, since no exponential behavior The constant hides possibly interesting structure In general isotropization cannot be expected Late-time asymptotics are well understood for a per ...
ME280 Homework #12
... (a) In this portion of the problem we are asked to determine the time required to grow a layer of SiO 2 that is 100 nm (i.e., 0.100 m) thick on the surface of a silicon chip at 1000C, in an atmosphere of O2 (oxygen pressure = 1 atm). Thus, using Equation 12.37, it is necessary to solve for the tim ...
... (a) In this portion of the problem we are asked to determine the time required to grow a layer of SiO 2 that is 100 nm (i.e., 0.100 m) thick on the surface of a silicon chip at 1000C, in an atmosphere of O2 (oxygen pressure = 1 atm). Thus, using Equation 12.37, it is necessary to solve for the tim ...
Response to Gary Hoge on Whether the Earth can be the Center of
... In order to attempt an escape from this implication, Hawking proposes an “alternate explanation”: “There is, however, an alternate explanation: the universe might look the same in every direction as seen from any other galaxy, too. This, as we have seen, was Friedmann’s second assumption. We have no ...
... In order to attempt an escape from this implication, Hawking proposes an “alternate explanation”: “There is, however, an alternate explanation: the universe might look the same in every direction as seen from any other galaxy, too. This, as we have seen, was Friedmann’s second assumption. We have no ...
Why trust a theory? Some further remarks (part 1)
... his unique strength. He argued that most places will be uninteresting, with space either expanding so rapidly as to be essentially empty, or contracting to a singularity long before anything interesting can happen. But there will be a sweet spot in between, where spacetime looks much like what we se ...
... his unique strength. He argued that most places will be uninteresting, with space either expanding so rapidly as to be essentially empty, or contracting to a singularity long before anything interesting can happen. But there will be a sweet spot in between, where spacetime looks much like what we se ...
The Origin of Matter-Antimatter Asymmetry Ning Bao Prashant Saraswat
... the MSSM just barely viable– bounds on the Higgs mass from the LHC likely to constrain scenarios of supersymmetric EWBG EDM experiments may determine if there is sufficient CP violation: ...
... the MSSM just barely viable– bounds on the Higgs mass from the LHC likely to constrain scenarios of supersymmetric EWBG EDM experiments may determine if there is sufficient CP violation: ...
Slide 1
... • A "true" color image or photograph recreates what our eyes would see in visible light under natural conditions • To create a color image from data at other wavelengths, astronomers represent it in "false" colors • Three of grayscale images from different wavelengths may be mapped to red, green, an ...
... • A "true" color image or photograph recreates what our eyes would see in visible light under natural conditions • To create a color image from data at other wavelengths, astronomers represent it in "false" colors • Three of grayscale images from different wavelengths may be mapped to red, green, an ...
The Universe, Space, and Stars
... position that takes place when the position of the observer changes. To see an example of parallax, try holding your finger about 1 foot (30 cm) in front of your eyes. Now, while focusing on your finger, close one eye and then the other. Alternate back and forth between eyes, and pay attention to ho ...
... position that takes place when the position of the observer changes. To see an example of parallax, try holding your finger about 1 foot (30 cm) in front of your eyes. Now, while focusing on your finger, close one eye and then the other. Alternate back and forth between eyes, and pay attention to ho ...
Flatness problem
The flatness problem (also known as the oldness problem) is a cosmological fine-tuning problem within the Big Bang model of the universe. Such problems arise from the observation that some of the initial conditions of the universe appear to be fine-tuned to very 'special' values, and that a small deviation from these values would have had massive effects on the nature of the universe at the current time.In the case of the flatness problem, the parameter which appears fine-tuned is the density of matter and energy in the universe. This value affects the curvature of space-time, with a very specific critical value being required for a flat universe. The current density of the universe is observed to be very close to this critical value. Since the total density departs rapidly from the critical value over cosmic time, the early universe must have had a density even closer to the critical density, departing from it by one part in 1062 or less. This leads cosmologists to question how the initial density came to be so closely fine-tuned to this 'special' value.The problem was first mentioned by Robert Dicke in 1969. The most commonly accepted solution among cosmologists is cosmic inflation, the idea that the universe went through a brief period of extremely rapid expansion in the first fraction of a second after the Big Bang; along with the monopole problem and the horizon problem, the flatness problem is one of the three primary motivations for inflationary theory.