Positions in the Solar System
... AsScientists millions of believe yearsthat passed, Solarthe Systems dense formed areas In short, after the Big Bang, Further away from the center of this mass of in similar the universe ways. pulled Giant clouds in material of dust because andwhere gas the they star was forming, there ...
... AsScientists millions of believe yearsthat passed, Solarthe Systems dense formed areas In short, after the Big Bang, Further away from the center of this mass of in similar the universe ways. pulled Giant clouds in material of dust because andwhere gas the they star was forming, there ...
Slide 1
... AsScientists millions of believe yearsthat passed, Solarthe Systems dense formed areas In short, after the Big Bang, Further away from the center of this mass of in similar the universe ways. pulled Giant clouds in material of dust because andwhere gas the they star was forming, there ...
... AsScientists millions of believe yearsthat passed, Solarthe Systems dense formed areas In short, after the Big Bang, Further away from the center of this mass of in similar the universe ways. pulled Giant clouds in material of dust because andwhere gas the they star was forming, there ...
Powerpoint of lecture 14
... with observations, remembering that models are zero age and observed stars have range of ages – see blackboard sketch ...
... with observations, remembering that models are zero age and observed stars have range of ages – see blackboard sketch ...
![Multiple choice questions [60 points]](http://s1.studyres.com/store/data/002785313_1-b2734444f348f25d9b46ea15f542520b-300x300.png)
Lesson 9 - The Link Between Force and Motion
... Noah Formula may know his formulas but he does not know (or does not believe) Newton's laws. If the forces acting on an object are balanced and the object is in motion, then it will continue in motion with the same velocity. Remember Forces do not cause motion. Forces cause accelerations. ...
... Noah Formula may know his formulas but he does not know (or does not believe) Newton's laws. If the forces acting on an object are balanced and the object is in motion, then it will continue in motion with the same velocity. Remember Forces do not cause motion. Forces cause accelerations. ...
ch 4 Giancoli
... Inertial reference frames: An inertial reference frame is one in which Newton’s first law is valid. This excludes rotating and accelerating frames. ...
... Inertial reference frames: An inertial reference frame is one in which Newton’s first law is valid. This excludes rotating and accelerating frames. ...
Chapter 4 Force and Motion
... enormous number of real-world problems. Most of the first half of your text is applications of Newton’s laws. Matter has inertia. An object at rest “wants” to stay at rest. A moving object “wants” to keep moving. There are lots of different ways to state Newton’s first law. Here’s one: an object at ...
... enormous number of real-world problems. Most of the first half of your text is applications of Newton’s laws. Matter has inertia. An object at rest “wants” to stay at rest. A moving object “wants” to keep moving. There are lots of different ways to state Newton’s first law. Here’s one: an object at ...
Friction, Work, and Energy in the Inclined Plane
... For the object with a given mass m 2 that moves downward, work is being done on the object by the force of gravity. The work done is simply the object’s weight times the distance through which it moved: ...
... For the object with a given mass m 2 that moves downward, work is being done on the object by the force of gravity. The work done is simply the object’s weight times the distance through which it moved: ...
The Milky Way and other Galaxies
... Plot of rotational velocity vs. distance from the center of the galaxy: rotation curve ...
... Plot of rotational velocity vs. distance from the center of the galaxy: rotation curve ...
Chapter 7
... orbits by a gravitational pull to the Sun and the other planets in the Solar System. • He went on to conclude that there is a mutual gravitational force between all particles of matter. • From that he saw that the attractive force was universal to all objects based on their mass and the distance the ...
... orbits by a gravitational pull to the Sun and the other planets in the Solar System. • He went on to conclude that there is a mutual gravitational force between all particles of matter. • From that he saw that the attractive force was universal to all objects based on their mass and the distance the ...
Modified Newtonian dynamics
In physics, modified Newtonian dynamics (MOND) is a theory that proposes a modification of Newton's laws to account for observed properties of galaxies. Created in 1983 by Israeli physicist Mordehai Milgrom, the theory's original motivation was to explain the fact that the velocities of stars in galaxies were observed to be larger than expected based on Newtonian mechanics. Milgrom noted that this discrepancy could be resolved if the gravitational force experienced by a star in the outer regions of a galaxy was proportional to the square of its centripetal acceleration (as opposed to the centripetal acceleration itself, as in Newton's Second Law), or alternatively if gravitational force came to vary inversely with radius (as opposed to the inverse square of the radius, as in Newton's Law of Gravity). In MOND, violation of Newton's Laws occurs at extremely small accelerations, characteristic of galaxies yet far below anything typically encountered in the Solar System or on Earth.MOND is an example of a class of theories known as modified gravity, and is an alternative to the hypothesis that the dynamics of galaxies are determined by massive, invisible dark matter halos. Since Milgrom's original proposal, MOND has successfully predicted a variety of galactic phenomena that are difficult to understand from a dark matter perspective. However, MOND and its generalisations do not adequately account for observed properties of galaxy clusters, and no satisfactory cosmological model has been constructed from the theory.