Forces Physical Science Chapter 2
... • The unit for mass is kg, the unit for velocity is meter/second, therefore the unit for momentum is kg m/sec • Conservation of Momentum: – When two or more objects interact (collide) the total momentum before the collision is equal to the total momentum after the collision ...
... • The unit for mass is kg, the unit for velocity is meter/second, therefore the unit for momentum is kg m/sec • Conservation of Momentum: – When two or more objects interact (collide) the total momentum before the collision is equal to the total momentum after the collision ...
Not a limitation
... • Galaxies don’t seem to be slowing down (so Big Crunch is doubtful, or we’re still in a period of expansion) • Open universe: idea that not enough matter to keep it all together, and things keep expanding (like molecules from open jar) • Closed universe: idea that enough mass to pull everything bac ...
... • Galaxies don’t seem to be slowing down (so Big Crunch is doubtful, or we’re still in a period of expansion) • Open universe: idea that not enough matter to keep it all together, and things keep expanding (like molecules from open jar) • Closed universe: idea that enough mass to pull everything bac ...
Force
... Field forces are exerted without contact. – Also known as non contact forces or action at distances forces ...
... Field forces are exerted without contact. – Also known as non contact forces or action at distances forces ...
Document
... We already discussed gravitation when deriving hydrostatic pressure. But we used an oversimplification that F = mg. Here we dive into more details that consider the following: “True” Gravitational acceleration isn’t constant with position -- it goes like 1/r2 The Earth’s surface is somewhat nons ...
... We already discussed gravitation when deriving hydrostatic pressure. But we used an oversimplification that F = mg. Here we dive into more details that consider the following: “True” Gravitational acceleration isn’t constant with position -- it goes like 1/r2 The Earth’s surface is somewhat nons ...
1020 Test review
... A ball’s weight is proportional to its mass weight/mass = constant On earth’s surface, weight/mass = 9.8 newtons/kilogram – is the same for all balls (or other objects) – is called “acceleration due to gravity” ...
... A ball’s weight is proportional to its mass weight/mass = constant On earth’s surface, weight/mass = 9.8 newtons/kilogram – is the same for all balls (or other objects) – is called “acceleration due to gravity” ...
Slide 1
... According to the standard theory, our universe sprang into existence as "singularity" around 13.7 billion years ago. Our universe is thought to have begun as an infinitesimally small, infinitely hot, infinitely dense, something - a singularity. ...
... According to the standard theory, our universe sprang into existence as "singularity" around 13.7 billion years ago. Our universe is thought to have begun as an infinitesimally small, infinitely hot, infinitely dense, something - a singularity. ...
Newton`s universal law of gravitation states that every
... Newton's universal law of gravitation states that every particle in the universe attracts every other particle with a force along a line joining them. The force is directly proportional to the product of their masses and inversely ...
... Newton's universal law of gravitation states that every particle in the universe attracts every other particle with a force along a line joining them. The force is directly proportional to the product of their masses and inversely ...
Document
... There are a few concepts that you must understand. You start to understand the concepts by applying them. • Observations and experiment • Questions • Problems ...
... There are a few concepts that you must understand. You start to understand the concepts by applying them. • Observations and experiment • Questions • Problems ...
SHM Dynamics WS (honors)
... The speed starts at zero, increases continuously until bob reaches the equilibrium point. It then begins to decrease continuously, becoming zero at the opposite endpoint. ...
... The speed starts at zero, increases continuously until bob reaches the equilibrium point. It then begins to decrease continuously, becoming zero at the opposite endpoint. ...
doc
... Final Jeopardy: The Origin of the Elements -----------------------------------------An element, and the process or object which ultimately created it. ...
... Final Jeopardy: The Origin of the Elements -----------------------------------------An element, and the process or object which ultimately created it. ...
Week 5 (10/16) – Quiz #11
... Which of the following statements comparing our Sun to another star X located at the outer edge of the Milky Way galaxy is TRUE: ...
... Which of the following statements comparing our Sun to another star X located at the outer edge of the Milky Way galaxy is TRUE: ...
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.