Energy
... simply changes form from liquid to gas • Heat energy does not “turn into” water, it simply allows water to change positions from the river to above the dam Matter cycles between different forms ...
... simply changes form from liquid to gas • Heat energy does not “turn into” water, it simply allows water to change positions from the river to above the dam Matter cycles between different forms ...
Energy
... • The two basic kinds of energy are kinetic energy and potential energy. • The energy an object has due to its motion is called kinetic energy. • Objects that are moving do work, and therefore have energy. • Stored energy that results from the position or shape of an object is called potential energ ...
... • The two basic kinds of energy are kinetic energy and potential energy. • The energy an object has due to its motion is called kinetic energy. • Objects that are moving do work, and therefore have energy. • Stored energy that results from the position or shape of an object is called potential energ ...
On early and late phases of acceleration of the
... period under the same banner “On early and late phases of acceleration of the expansion of the Universe”. This title can be read at several level which are reflected through this manuscript: on the first level, indeed our universe is expanding. This first point is now a matter of fact for the underg ...
... period under the same banner “On early and late phases of acceleration of the expansion of the Universe”. This title can be read at several level which are reflected through this manuscript: on the first level, indeed our universe is expanding. This first point is now a matter of fact for the underg ...
energy - Ms. McGuirk`s 6th Grade Science Class
... gravitational potential energy. Which has the greater gravitational potential energy: the black vase on the 6th shelf or the vase on the 3rd shelf? The black vase has the greater gravitational potential energy remember G.P.E. depends on height and weight! ...
... gravitational potential energy. Which has the greater gravitational potential energy: the black vase on the 6th shelf or the vase on the 3rd shelf? The black vase has the greater gravitational potential energy remember G.P.E. depends on height and weight! ...
Origin of the Chemical Elements
... Universe increased exponentially. This is called inflationary epoch. The wavelength of any physical object is redshifted in proportion with the global scale. Therefore, at a certain moment fluctuations with a wavelength bigger than the horizon were ‗felt‘ as constant fields and did not influence any ...
... Universe increased exponentially. This is called inflationary epoch. The wavelength of any physical object is redshifted in proportion with the global scale. Therefore, at a certain moment fluctuations with a wavelength bigger than the horizon were ‗felt‘ as constant fields and did not influence any ...
Energy - Science
... Albert Einstein developed his special theory of relativity in 1905. This theory included the nowfamous equation E = mc2. • E is energy, m is mass, and c is the speed of light. • The speed of light is an extremely large number, 3.0 × 108 ...
... Albert Einstein developed his special theory of relativity in 1905. This theory included the nowfamous equation E = mc2. • E is energy, m is mass, and c is the speed of light. • The speed of light is an extremely large number, 3.0 × 108 ...
ENERGY
... There are different forms of the two general kinds of energy. The energy associated with the motion or position of an object is called ...
... There are different forms of the two general kinds of energy. The energy associated with the motion or position of an object is called ...
Cosmological Transient Objects
... • At the time of explosion, the supernova can shine brighter than the host galaxy consisting of billions of stars. • In one month, a supernova can emit as much energy as Sun would emit in its entire life span of billions of years. • GRBs: biggest source of gamma-rays in universe and 100 times more e ...
... • At the time of explosion, the supernova can shine brighter than the host galaxy consisting of billions of stars. • In one month, a supernova can emit as much energy as Sun would emit in its entire life span of billions of years. • GRBs: biggest source of gamma-rays in universe and 100 times more e ...
Astronomy in 1936 The History of the Universe
... • Excess gravitational attraction slows down gas, stars when they pass through spiral arm in course of their orbits. • Î spiral arms are a traffic jam ...
... • Excess gravitational attraction slows down gas, stars when they pass through spiral arm in course of their orbits. • Î spiral arms are a traffic jam ...
Energy, Work, and Power
... Calculate the GPE a boy of mass 75kg gains if he climbs 50 steps, each step having a height of 20cm 2. A girl, mass 55kg, jumps off a bridge into the water below. The bridge is 2.5m above the water, Calculate the GPE the girl lost when she hits the water. ...
... Calculate the GPE a boy of mass 75kg gains if he climbs 50 steps, each step having a height of 20cm 2. A girl, mass 55kg, jumps off a bridge into the water below. The bridge is 2.5m above the water, Calculate the GPE the girl lost when she hits the water. ...
Energy Transformations Animations
... any kind of sound - from a human, machine, animal, Discman, etc. example(s): _______________________________________________________ chemical ___________________ energy – energy stored in the chemical bonds between atoms and molecules energy plants store by photosynthesis, any food we eat, coal, oil ...
... any kind of sound - from a human, machine, animal, Discman, etc. example(s): _______________________________________________________ chemical ___________________ energy – energy stored in the chemical bonds between atoms and molecules energy plants store by photosynthesis, any food we eat, coal, oil ...
Where Does Helium Come from?
... After the Plank Era, or between 10−43 and 10−35 s, we know that the universe, which had already expanded and cooled dramatically (but still a very hot ...
... After the Plank Era, or between 10−43 and 10−35 s, we know that the universe, which had already expanded and cooled dramatically (but still a very hot ...
Radiant Thermal Energy Is Not Additive
... (Coopersmith, 2010) of the bonds holding matter together. Thermal radiation in air and space is induced by this “ceaseless jiggling motion” on the surface of matter. Thus, radiant thermal energy is simply the microscopic frequency of oscillation in cycles per second times a constant of proportionali ...
... (Coopersmith, 2010) of the bonds holding matter together. Thermal radiation in air and space is induced by this “ceaseless jiggling motion” on the surface of matter. Thus, radiant thermal energy is simply the microscopic frequency of oscillation in cycles per second times a constant of proportionali ...
Galaxy5
... • Ancient stars (age > 12 billion years) have virtually no processed heavy elements. While stars like the Sun (Age = 4.5 billion years) have a thousand times more, and new stars have 20 times what the Sun has. • Galaxy very long ago were only merging galaxy fragments. They weren’t the large, well de ...
... • Ancient stars (age > 12 billion years) have virtually no processed heavy elements. While stars like the Sun (Age = 4.5 billion years) have a thousand times more, and new stars have 20 times what the Sun has. • Galaxy very long ago were only merging galaxy fragments. They weren’t the large, well de ...
Ch 33) Astrophysics and Cosmology
... nebulae must be galaxies similar to ours. (Note that it is usual to capitalize the word “galaxy” only when it refers to our own.) Today it is thought there are roughly 1011 galaxies in the observable universe—that is, roughly as many galaxies as there are stars in a galaxy. See Fig. 33–5. Many galax ...
... nebulae must be galaxies similar to ours. (Note that it is usual to capitalize the word “galaxy” only when it refers to our own.) Today it is thought there are roughly 1011 galaxies in the observable universe—that is, roughly as many galaxies as there are stars in a galaxy. See Fig. 33–5. Many galax ...
pages 401-450 - Light and Matter
... ahead and which was behind. Since they don’t need to be reunited, neither one needs to undergo any acceleration; each clock can fix an inertial frame of reference, with a velocity vector that changes neither its direction nor its magnitude. But this violates the principle that constant-velocity moti ...
... ahead and which was behind. Since they don’t need to be reunited, neither one needs to undergo any acceleration; each clock can fix an inertial frame of reference, with a velocity vector that changes neither its direction nor its magnitude. But this violates the principle that constant-velocity moti ...
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.