Likely formation of general relativistic radiation pressure supported
... limits depend on the equation of state (EOS) and other details. However, for a pure cold, Helium dwarf, Mch ∼ 1.4M⊙ , where M⊙ is the solar mass. On the other hand, for a pure free neutron Fermi-Dirac fluid, Mov ∼ 0.8M⊙ . But if such upper limits were the full story, we would not have had stars of m ...
... limits depend on the equation of state (EOS) and other details. However, for a pure cold, Helium dwarf, Mch ∼ 1.4M⊙ , where M⊙ is the solar mass. On the other hand, for a pure free neutron Fermi-Dirac fluid, Mov ∼ 0.8M⊙ . But if such upper limits were the full story, we would not have had stars of m ...
HW4
... In an exciting game, a baseball player manages to safely slide into second base. The mass of the baseball player is 84.1 kg and the coefficient of kinetic friction between the ground and the player is 0.49. (a) Find the magnitude of the frictional force. 404 N (b) It takes the player 1.6 s to come t ...
... In an exciting game, a baseball player manages to safely slide into second base. The mass of the baseball player is 84.1 kg and the coefficient of kinetic friction between the ground and the player is 0.49. (a) Find the magnitude of the frictional force. 404 N (b) It takes the player 1.6 s to come t ...
quiz and answers ch4 sec 1-2
... 2. The free-body diagram shown above represents a car being pulled by a towing cable. In the diagram, which of the following is the gravitational force acting on the car? a. 5800 N c. 14 700 N b. 775 N d. 13 690 N 3. The free-body diagram shown above represents a car being pulled by a towing cable. ...
... 2. The free-body diagram shown above represents a car being pulled by a towing cable. In the diagram, which of the following is the gravitational force acting on the car? a. 5800 N c. 14 700 N b. 775 N d. 13 690 N 3. The free-body diagram shown above represents a car being pulled by a towing cable. ...
Document
... A horizontal projectile has a constant horizontal velocity and an increasing vertical velocity as it falls to the ground. The combined effect of the two velocities results in a curved path (parabola). Neglecting air resistance, an arrow shot horizontally will strike the ground at the same time as o ...
... A horizontal projectile has a constant horizontal velocity and an increasing vertical velocity as it falls to the ground. The combined effect of the two velocities results in a curved path (parabola). Neglecting air resistance, an arrow shot horizontally will strike the ground at the same time as o ...
Description of Motion in One Dimension
... parachutist accelerates downwards; as they get faster, air friction increases until weight = friction. Then the parachutist is at constant velocity – the acceleration is zero – resultant force is zero) A car traveling (if air resistance equals the force forwards due to engine, then the car is at con ...
... parachutist accelerates downwards; as they get faster, air friction increases until weight = friction. Then the parachutist is at constant velocity – the acceleration is zero – resultant force is zero) A car traveling (if air resistance equals the force forwards due to engine, then the car is at con ...
Course: Advanced Placement Physics B Teacher: Mr. Nathan
... centripetal acceleration and centripetal force Describe the direction of velocity, acceleration, and force vectors at any instant during circular motion Determine the net force (centripetal force) using free-body diagrams on an object for both horizontal and vertical circles Understand that centrifu ...
... centripetal acceleration and centripetal force Describe the direction of velocity, acceleration, and force vectors at any instant during circular motion Determine the net force (centripetal force) using free-body diagrams on an object for both horizontal and vertical circles Understand that centrifu ...
PC1221 Fundamentals of Physics I Inertia Wheel 1 Purpose 2
... element of mass mi located at a distance ri from some particular axis, then the total moment of inertia of the body is given by I= ...
... element of mass mi located at a distance ri from some particular axis, then the total moment of inertia of the body is given by I= ...
Jeopardy
... If you are holding a rock at your shoulder while you are riding on a bus at constant velocity and then drop it, this is where it will land. ...
... If you are holding a rock at your shoulder while you are riding on a bus at constant velocity and then drop it, this is where it will land. ...
1. What is unit vector? 2. State the principle of transmissibility.
... 13. Why the couple moment is said to be a free vector? 14. State the necessary and sufficient conditions for equilibrium of rigid bodies in two dimensions. 15. When will the product of inertia of a lamina become zero? 16. Write the SI units of the mass moment of inertia and of the area moment of ine ...
... 13. Why the couple moment is said to be a free vector? 14. State the necessary and sufficient conditions for equilibrium of rigid bodies in two dimensions. 15. When will the product of inertia of a lamina become zero? 16. Write the SI units of the mass moment of inertia and of the area moment of ine ...
Document
... two bands depends on dust composition (assume known) • Then we see how big the shift is to estimate extinction ...
... two bands depends on dust composition (assume known) • Then we see how big the shift is to estimate extinction ...
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.