Energy
... If you double the mass of an object, you double the KE If you double the speed of an object, you quadruple the KE ...
... If you double the mass of an object, you double the KE If you double the speed of an object, you quadruple the KE ...
Chapter 4 Section 2 Notes AIM: Describe how energy can be
... 1. The total amount of energy in a system never changes. The Law of Conservation of Energy states that energy cannot be created or destroyed. 2. Sometimes it is difficult to see the Law of Conservation of Energy at work. 3. Friction and air resistance cause some of the mechanical energy of systems t ...
... 1. The total amount of energy in a system never changes. The Law of Conservation of Energy states that energy cannot be created or destroyed. 2. Sometimes it is difficult to see the Law of Conservation of Energy at work. 3. Friction and air resistance cause some of the mechanical energy of systems t ...
The exam includes the following: PART A: 35 multiple choice ( 1
... PART F: problems to be solved ( 10 points ) PART G: Bonus question ( 5 points) Material included in the exam: Chapter 5: Matter in motion MAIN POINTS: SECTION 5.1 Three States of Matter Describe the motion of an object by the position of the object in relation to a reference point. Identify ...
... PART F: problems to be solved ( 10 points ) PART G: Bonus question ( 5 points) Material included in the exam: Chapter 5: Matter in motion MAIN POINTS: SECTION 5.1 Three States of Matter Describe the motion of an object by the position of the object in relation to a reference point. Identify ...
What we will do today:
... • It is expanding in all directions with the space between each galaxy increasing as they move away from each other • “as fast as it can go, at the speed of light” – this lyric is wrong as it suggests a constant speed however the expansion is actually accelerating. • “12 million miles a minute” - us ...
... • It is expanding in all directions with the space between each galaxy increasing as they move away from each other • “as fast as it can go, at the speed of light” – this lyric is wrong as it suggests a constant speed however the expansion is actually accelerating. • “12 million miles a minute” - us ...
Work and Energy
... MC A change in gravitational potential energy (a) is always positive, (b) depends on the reference point, (c) depends on the path, (d) depends only on the initial and final positions. MC The change in gravitational potential energy can be found by calculating mg h and subtracting the reference poin ...
... MC A change in gravitational potential energy (a) is always positive, (b) depends on the reference point, (c) depends on the path, (d) depends only on the initial and final positions. MC The change in gravitational potential energy can be found by calculating mg h and subtracting the reference poin ...
The Hubble Space Telescope - the first 10 years
... Calculating Distances • If you move an object away it gets fainter • Once its 10x further away it is 100x fainter • Hence if we know how bright a star SHOULD be and we measure how bright it ACTUALLY is we can estimate the distance • This relies on finding stars with KNOWN brightness and luckily the ...
... Calculating Distances • If you move an object away it gets fainter • Once its 10x further away it is 100x fainter • Hence if we know how bright a star SHOULD be and we measure how bright it ACTUALLY is we can estimate the distance • This relies on finding stars with KNOWN brightness and luckily the ...
WHERE DO ELEMENTS COME FROM?
... • Penzias and Wilson won the Nobel Prize in 1978 for detection of the Cosmic Microwave Background radiation! • The universe is glowing at 2.73K • This was the Third Great Observation to nail down the Big Bang as real! ...
... • Penzias and Wilson won the Nobel Prize in 1978 for detection of the Cosmic Microwave Background radiation! • The universe is glowing at 2.73K • This was the Third Great Observation to nail down the Big Bang as real! ...
Energy Transformations
... Please give an example of the following energy conversions: Chemical to heat________________________________________________________________ Chemical to mechanical__________________________________________________________ Chemical to light_____________________________________________________________ ...
... Please give an example of the following energy conversions: Chemical to heat________________________________________________________________ Chemical to mechanical__________________________________________________________ Chemical to light_____________________________________________________________ ...
Energy
... • Both potential energy and kinetic energy are kinds of mechanical energy • Mechanical energy can be all potential energy, all kinetic energy, or some of each ...
... • Both potential energy and kinetic energy are kinds of mechanical energy • Mechanical energy can be all potential energy, all kinetic energy, or some of each ...
Skill of the Week: Potential and Kinetic Energy
... energy of an object is equal to the work done to lift it. Remember that Work = Force × Distance. The force you use to lift the object is equal to its weight (but you would need to do a unit conversion from weight to force). The distance you move the object is its height. You can calculate an object’ ...
... energy of an object is equal to the work done to lift it. Remember that Work = Force × Distance. The force you use to lift the object is equal to its weight (but you would need to do a unit conversion from weight to force). The distance you move the object is its height. You can calculate an object’ ...
Kinetic and Potential Energy Worksheet Name
... Classify the following as a type of potential energy or kinetic energy (use the letters K or P) 1. A bicyclist pedaling up a hill ...
... Classify the following as a type of potential energy or kinetic energy (use the letters K or P) 1. A bicyclist pedaling up a hill ...
Practice Questions for Final
... A. prior to this time, the electroweak and strong forces were indistinguishable from each other, but after this time they behaved differently from each other B. following this time, neither the strong nor electroweak forces are ever important in the universe again C. these forces are important only ...
... A. prior to this time, the electroweak and strong forces were indistinguishable from each other, but after this time they behaved differently from each other B. following this time, neither the strong nor electroweak forces are ever important in the universe again C. these forces are important only ...
PE and KE Notes - Northwest ISD Moodle
... is measured by how much is work done to put an object in motion or to rest. Kinetic Energy depends on Mass and Speed. • A basketball player has kinetic energy. The movements that she does show the energy that is being displayed while she is moving. • When you are running, walking, or jumping, your b ...
... is measured by how much is work done to put an object in motion or to rest. Kinetic Energy depends on Mass and Speed. • A basketball player has kinetic energy. The movements that she does show the energy that is being displayed while she is moving. • When you are running, walking, or jumping, your b ...
Astrophysics Outline—Option E
... E.3.14 State the relationship between period and absolute magnitude for Cepheid variables E.3.15 Explain hoe Cepheid variables may be used as “standard candles” E.3.16 Determine the distance to a Cepheid variable using the luminosity-period relationship E.4 Cosmology Assessment Statement Olbers’ par ...
... E.3.14 State the relationship between period and absolute magnitude for Cepheid variables E.3.15 Explain hoe Cepheid variables may be used as “standard candles” E.3.16 Determine the distance to a Cepheid variable using the luminosity-period relationship E.4 Cosmology Assessment Statement Olbers’ par ...
Topic Outline - Physics Rocks!
... E.3.14 State the relationship between period and absolute magnitude for Cepheid variables E.3.15 Explain hoe Cepheid variables may be used as “standard candles” ...
... E.3.14 State the relationship between period and absolute magnitude for Cepheid variables E.3.15 Explain hoe Cepheid variables may be used as “standard candles” ...
Energy - isd194 cms .demo. ties .k12. mn .us
... Chemical Energy: energy of a compound that changes as its atoms are rearranged….a substance changes into a brand new substance. ...
... Chemical Energy: energy of a compound that changes as its atoms are rearranged….a substance changes into a brand new substance. ...
21structure1i
... There is no single method that can be used to find the distances to all objects We use many methods, each building on the other Called the cosmic distance ladder ...
... There is no single method that can be used to find the distances to all objects We use many methods, each building on the other Called the cosmic distance ladder ...
Pretest 2
... and the gravitational potential energy had decreased by 800 joules. What is the total amount of mechanical energy lost as heat because of friction? [80 J] ...
... and the gravitational potential energy had decreased by 800 joules. What is the total amount of mechanical energy lost as heat because of friction? [80 J] ...
Slide 1
... constant to his equations of general relativity to counteract the attractive effects of gravity on ordinary matter, which would otherwise cause the universe to either collapse or expand forever. This motivation evaporated after the discovery by Edwin Hubble that the universe is in fact not static, b ...
... constant to his equations of general relativity to counteract the attractive effects of gravity on ordinary matter, which would otherwise cause the universe to either collapse or expand forever. This motivation evaporated after the discovery by Edwin Hubble that the universe is in fact not static, b ...
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.