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The Early Universe and the Big Bang
The Early Universe and the Big Bang

Notes 6.P.3A.1
Notes 6.P.3A.1

... ● Heat energy always moves from hotter objects to cooler objects. Radiant energy ● Energy which is transferred through electromagnetic waves such as visible light, ultraviolet light or X-rays. ● Solar energy is a type of radiant energy. ○ Green plants use solar energy during photosynthesis. ○ Most o ...
P1 2.1 Energy transfers
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... Forms of energy • Energy is needed to keep us working, and to operate all the machines around us. • Different forms of energy include….. • Light, sound, electrical, potential and kinetic energy. • Energy can also be stored. Nuclear energy is stored inside atoms. Food, fuels and electric batteries a ...
Answers The Universe Year 10 Science Chapter 6
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... number of different theories about the fate of the universe conclude that the universe will end (in a very long time from the present) (Image courtesy, NASA, Wikimedia Commons). 3 The approximate age of the universe, according to the big bang theory, is about 13.8 billion years. 4 A rough estimate ...
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... 1) Energy required for ride comes from work done by the conveyor that lifts the cars and passengers. 2) Energy from initial work is stored as GPE at the top of the first hill. 3) Energy transformations begin: kinetic to potential to kinetic, etc., heat energy, sound energy. ...
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... Tip: We use energy to do work and make all movements. When we eat, our bodies transform the food into energy to do work. When we run or walk or do some work, we ‘burn’ energy in our bodies. 2. B. II and IV Tip: Energy comes in six forms: chemical energy, electrical energy, radiant energy, mechanical ...
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... molecules. KEav = (3/2) RT Random motion is often called thermal motion. Heat involves the transfer of energy between two objects due to a temperature difference between the two objects. When a hot body is brought into contact with a colder body, the two temperatures change until they become equal t ...
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JAN – PATHFINDER SCIENCE Section 1

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energy photo shoot

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... radiant, thermal, and nuclear). (DOK 1) 1b) Review: I can determine the type of energy in given objects and situations. (DOK 1-2) 1c) Review: I can compare and contrast different forms of energy (ie. potential vs. kinetic energy; renewable vs. nonrenewable energy) (DOK 2) ...
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... As a swing moves back and forth, the energy is converting from one form to another….. Why will the swing eventually stop? In what form will that energy be transferred into? ...
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mechanical energy

... Law of Conservation of Energy 6. ________________________________________: Energy cannot be created or destroyed, but only changed from one form into another. thermal energy 7. _____________________: Internal kinetic energy due to the random motion of particles that make up an object. 8. mechanical ...
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... Barton[9]. It will also give a correction to the above free result for the vacuum energy density[10]. Then there is no longer any exact cancellation between the divergences in the electric and magnetic contributions near the plates so that the regulated energy density will diverges there. When integ ...
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Energy - SCHOOLinSITES

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Universe and Galaxy Short Study Guide

... instead grew on a diet of gas and stars controlled by their host galaxies in the beginning years of the universe. An initial look at 30 galaxies indicates that black holes do not precede a galaxy’s birth, but instead evolve with the galaxy by trapping an amazingly exact percentage (0.2) of the mass ...
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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.
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