Energy Transformations
... Choose the best answer to each of the following questions. 1. Niagara Falls is a good example of a. kinetic energy being transformed into potential energy. b. potential energy being transformed into kinetic energy c. energy being created. 2. The law of conservation of energy states that when one for ...
... Choose the best answer to each of the following questions. 1. Niagara Falls is a good example of a. kinetic energy being transformed into potential energy. b. potential energy being transformed into kinetic energy c. energy being created. 2. The law of conservation of energy states that when one for ...
Energy Jeopardy
... Energy Forms Etc. 300 • What does the g represent in the PE equation and what are the units used to identify that variable? ...
... Energy Forms Etc. 300 • What does the g represent in the PE equation and what are the units used to identify that variable? ...
Big Bang
... model in which the universe was both expanding and eternal • Hoyle christened the theory, referring to it disdainfully in a radio broadcast as "this 'Big Bang' idea". ...
... model in which the universe was both expanding and eternal • Hoyle christened the theory, referring to it disdainfully in a radio broadcast as "this 'Big Bang' idea". ...
Cosmology and Particle Physics
... The Russian-born American physicist George Gamow (19041968) was among the rst to note that, if there was a Big Bang, the remnants of the primordial reball should still be evident and should be blackbody radiation. Since the radiation from this reball has been traveling to us since shortly after ...
... The Russian-born American physicist George Gamow (19041968) was among the rst to note that, if there was a Big Bang, the remnants of the primordial reball should still be evident and should be blackbody radiation. Since the radiation from this reball has been traveling to us since shortly after ...
Potential and Kinetic Energy
... • Acceleration is the change in velocity per unit of time. • An example of this is when you travel in your car. • Your velocity is not constant throughout the entire trip as you slow down and speed up as necessary. • A positive acceleration means that you are speeding up and a negative acceleration ...
... • Acceleration is the change in velocity per unit of time. • An example of this is when you travel in your car. • Your velocity is not constant throughout the entire trip as you slow down and speed up as necessary. • A positive acceleration means that you are speeding up and a negative acceleration ...
Energy and Its Forms (section 1) The law of conservation of energy
... “stretched or compressed” PEe = ½ kx2 k is the object’s specific spring constant & x is the specific distance an object’s shape is changed; measured in joules. Mechanical Energy (450) energy associated with the motion and position of everyday objects Thermal Energy (451) total potential and kineti ...
... “stretched or compressed” PEe = ½ kx2 k is the object’s specific spring constant & x is the specific distance an object’s shape is changed; measured in joules. Mechanical Energy (450) energy associated with the motion and position of everyday objects Thermal Energy (451) total potential and kineti ...
W.Y.S.I.W.Y.G (What You See Is What You`ll Get) Unit 3: Energy Part
... Energy is the ability to cause change or do work. Energy cannot be touched, and has no mass or volume. Energy is measured in units called Joules (J). One way to classify energy is by type (kinetic vs. potential). Kinetic energy is the energy of moving objects, and depends on the mass of th ...
... Energy is the ability to cause change or do work. Energy cannot be touched, and has no mass or volume. Energy is measured in units called Joules (J). One way to classify energy is by type (kinetic vs. potential). Kinetic energy is the energy of moving objects, and depends on the mass of th ...
Tutor Notes
... • Velocity and speed are very close and often mixed up. They both measure d/t. Velocity adds an extra step; it measures distance over time or speed in a given direction. So a car’s speed could be 55 mph, but its velocity would be 55mph in a northward direction. • Acceleration is when any part of an ...
... • Velocity and speed are very close and often mixed up. They both measure d/t. Velocity adds an extra step; it measures distance over time or speed in a given direction. So a car’s speed could be 55 mph, but its velocity would be 55mph in a northward direction. • Acceleration is when any part of an ...
Work and Energy
... Energy is the ability to do work. Like work, energy is measured in joules. Potential energy is stored energy. Elastic potential energy is stored in any stretched or compressed elastic material. The gravitational potential energy of an object is determined by its mass, its height, and g, the free-fal ...
... Energy is the ability to do work. Like work, energy is measured in joules. Potential energy is stored energy. Elastic potential energy is stored in any stretched or compressed elastic material. The gravitational potential energy of an object is determined by its mass, its height, and g, the free-fal ...
Energy transformation notes
... Energy conversions • All forms of energy can be converted into other forms. – The sun’s energy through solar cells can be converted directly into electricity. – Green plants convert the sun’s energy (electromagnetic) into starches and sugars (chemical energy). – Our hands convert kinetic energy to ...
... Energy conversions • All forms of energy can be converted into other forms. – The sun’s energy through solar cells can be converted directly into electricity. – Green plants convert the sun’s energy (electromagnetic) into starches and sugars (chemical energy). – Our hands convert kinetic energy to ...
Potential and Kinetic Energy
... The ability to do work or cause change The energy of motion Stored energy Energy is neither created nor destroyed, it only changes form ...
... The ability to do work or cause change The energy of motion Stored energy Energy is neither created nor destroyed, it only changes form ...
Question paper - Unit 5 (6PH05) - January 2012
... A goes down. B goes up. C may increase or decrease. D must stay constant. (Total for Question 7 = 1 mark) 8 The pressure exerted by an ideal gas, maintained at a constant temperature, is inversely proportional to the volume occupied by the gas. Which of the following statements is not true? A The av ...
... A goes down. B goes up. C may increase or decrease. D must stay constant. (Total for Question 7 = 1 mark) 8 The pressure exerted by an ideal gas, maintained at a constant temperature, is inversely proportional to the volume occupied by the gas. Which of the following statements is not true? A The av ...
Potential energy - BCHSRegentsChemistry
... • The potential energy of an object due to a spring is determined by the distance the spring is stretched or compressed and the spring’s force constant. 1) The more the spring is stretched or compressed, the greater its potential energy will be. 2) The greater the spring’s force constant is, the its ...
... • The potential energy of an object due to a spring is determined by the distance the spring is stretched or compressed and the spring’s force constant. 1) The more the spring is stretched or compressed, the greater its potential energy will be. 2) The greater the spring’s force constant is, the its ...
Cosmology
... C. Dust prevents us from seeing beyond a certain distance. D. There are so many galaxies in the universe that they block our view. ...
... C. Dust prevents us from seeing beyond a certain distance. D. There are so many galaxies in the universe that they block our view. ...
Chapter 5 Guided Reading - Breathitt County Schools
... Fusion is the joining of nuclei and fission is the splitting of nuclei. Fission is the joining of nuclei and fusion is the splitting of nuclei. Fission releases energy and fusion absorbs energy. Fusion is the splitting of nuclei and fission is the joining of nuclei. ...
... Fusion is the joining of nuclei and fission is the splitting of nuclei. Fission is the joining of nuclei and fusion is the splitting of nuclei. Fission releases energy and fusion absorbs energy. Fusion is the splitting of nuclei and fission is the joining of nuclei. ...
NOTES – 7.1 – What is Energy
... energy, Earth would be a cold icy place with a temperature of -273 C. As well as warming the planet, the Sun’s energy drives the entire food chain. ...
... energy, Earth would be a cold icy place with a temperature of -273 C. As well as warming the planet, the Sun’s energy drives the entire food chain. ...
L 1-3
... 1. e- can have only specific (quantized) energy values 2. light is emitted as e- moves from higher energy level to a lower energy level ...
... 1. e- can have only specific (quantized) energy values 2. light is emitted as e- moves from higher energy level to a lower energy level ...
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.