Astronomy Astrophysics

... were purposely varied. Since the VVV catalog is well populated, the diﬀerences in the final color–magnitude diagram from field to field were marginal. The decontamination algorithm divides the full range of magnitude and colors of a CMD into a 3D grid of cells with axes along KS , (H−KS ), and (J−KS ...

... were purposely varied. Since the VVV catalog is well populated, the diﬀerences in the final color–magnitude diagram from field to field were marginal. The decontamination algorithm divides the full range of magnitude and colors of a CMD into a 3D grid of cells with axes along KS , (H−KS ), and (J−KS ...

Revising the census of low luminosity AGN

... WHY AN AGN CENSUS? • A PROPER AGN CENSUS IS NEEDED FOR A VARIETY OF STUDIES, SUCH AS, E.G. , THE AGN/HOST GALAXY CONNECTION, THE PROPERTIES OF THE CENTRAL ENGINE, THE AGN LUMINOSITY FUNCTION … • THE CENSUS SHOULD BE COMPLETE (OR AT LEAST WITH WELL DEFINED BIASES) AND INCLUDE THE LEAST NUMBER OF INT ...

... WHY AN AGN CENSUS? • A PROPER AGN CENSUS IS NEEDED FOR A VARIETY OF STUDIES, SUCH AS, E.G. , THE AGN/HOST GALAXY CONNECTION, THE PROPERTIES OF THE CENTRAL ENGINE, THE AGN LUMINOSITY FUNCTION … • THE CENSUS SHOULD BE COMPLETE (OR AT LEAST WITH WELL DEFINED BIASES) AND INCLUDE THE LEAST NUMBER OF INT ...

2nd Semester Final Study Guide-Clayton Answer

... 33. ____________________ is a measure of how far an object has moved. 34. An object changing its speed from 10 m/s to 3 m/s is undergoing ____________________ acceleration. 35. If the forces acting on an object at rest are ____________________, the object will remain at rest. 36. In the equation a = ...

... 33. ____________________ is a measure of how far an object has moved. 34. An object changing its speed from 10 m/s to 3 m/s is undergoing ____________________ acceleration. 35. If the forces acting on an object at rest are ____________________, the object will remain at rest. 36. In the equation a = ...

Slide 1

... 12.1 Rotational Inertia A long baseball bat held near its thinner end has more rotational inertia than a short bat of the same mass. • Once moving, it has a greater tendency to keep moving, but it is harder to bring it up to speed. • Baseball players sometimes “choke up” on a bat to reduce its rotat ...

... 12.1 Rotational Inertia A long baseball bat held near its thinner end has more rotational inertia than a short bat of the same mass. • Once moving, it has a greater tendency to keep moving, but it is harder to bring it up to speed. • Baseball players sometimes “choke up” on a bat to reduce its rotat ...

Final Exam Study Guide rtf

... 27. In the results of Rutherford’s gold foil experiment, what caused some of the alpha particles to bounce straight back from the gold foil? a. electrons in the gold atoms c. other alpha particles b. negative charges in the gold atoms d. nuclei in the gold atoms 28. Rutherford’s gold foil experimen ...

... 27. In the results of Rutherford’s gold foil experiment, what caused some of the alpha particles to bounce straight back from the gold foil? a. electrons in the gold atoms c. other alpha particles b. negative charges in the gold atoms d. nuclei in the gold atoms 28. Rutherford’s gold foil experimen ...

FREE Sample Here

... 46. How was the value of G first determined? a. by Cavendish, using a torsion balance b. by Eötvös, using a torsion balance c. via a gedanken experiment d. by Newton, watching an apple fall e. none of the above ANS: A ...

... 46. How was the value of G first determined? a. by Cavendish, using a torsion balance b. by Eötvös, using a torsion balance c. via a gedanken experiment d. by Newton, watching an apple fall e. none of the above ANS: A ...

final exam - PHYSICS57

... 1. At the instant when the traffic light turns green, an automobile starts with a constant acceleration of 1.8 m/s2. At the same instant a truck travelling with a constant speed of 8.5 m/s overtakes and passes the automobile. (a) How far beyond the starting point will the automobile overtake the tru ...

... 1. At the instant when the traffic light turns green, an automobile starts with a constant acceleration of 1.8 m/s2. At the same instant a truck travelling with a constant speed of 8.5 m/s overtakes and passes the automobile. (a) How far beyond the starting point will the automobile overtake the tru ...

Giancoli Ch 8.Word

... For each revolution the point on the edge will travel one circumference, so the total distance traveled is d = πD = (30.3 rev)π(0.40 m) = 38 m. 25. We use the initial conditions of t = 0, 0 = 0, and 0. If the angular acceleration is constant, the average angular acceleration is also the instant ...

... For each revolution the point on the edge will travel one circumference, so the total distance traveled is d = πD = (30.3 rev)π(0.40 m) = 38 m. 25. We use the initial conditions of t = 0, 0 = 0, and 0. If the angular acceleration is constant, the average angular acceleration is also the instant ...

CHAPTER 8

... For each revolution the point on the edge will travel one circumference, so the total distance traveled is d = πD = (30.3 rev)π(0.40 m) = 38 m. 25. We use the initial conditions of t = 0, 0 = 0, and 0. If the angular acceleration is constant, the average angular acceleration is also the instant ...

... For each revolution the point on the edge will travel one circumference, so the total distance traveled is d = πD = (30.3 rev)π(0.40 m) = 38 m. 25. We use the initial conditions of t = 0, 0 = 0, and 0. If the angular acceleration is constant, the average angular acceleration is also the instant ...

Introduction - Physics For Today

... Ans. Yes, as long as its speed is zero for only on instant in time. 15. Can you give an example wherein the acceleration of a body is opposite in direction to its velocity? Do so if you can. Ans. Yes. The direction of acceleration is the same as the direction of an object’s change in velocity. If yo ...

... Ans. Yes, as long as its speed is zero for only on instant in time. 15. Can you give an example wherein the acceleration of a body is opposite in direction to its velocity? Do so if you can. Ans. Yes. The direction of acceleration is the same as the direction of an object’s change in velocity. If yo ...

Report from the Subaru Telescope for External

... dark matter. Lensing studies of clusters have indeed conﬁrmed several important predictions of the standard-cold dark matter dominated (CDM) model. Okabe et al.(2010) used high-quality Subaru Telescope/Suprime-Cam imaging data to conduct a detailed weak lensing study of the distribution of dark matt ...

... dark matter. Lensing studies of clusters have indeed conﬁrmed several important predictions of the standard-cold dark matter dominated (CDM) model. Okabe et al.(2010) used high-quality Subaru Telescope/Suprime-Cam imaging data to conduct a detailed weak lensing study of the distribution of dark matt ...

Introductory Physics I - Duke Physics

... By making the book available in these various media at a cost ranging from free to cheap, I enable the text can be used by students all over the world where each student can pay (or not) according to their means. Nevertheless, I am hoping that students who truly find this work useful will purchase a ...

... By making the book available in these various media at a cost ranging from free to cheap, I enable the text can be used by students all over the world where each student can pay (or not) according to their means. Nevertheless, I am hoping that students who truly find this work useful will purchase a ...

Solutions to Problems for Chapter One ( ) 0.0254 m ( ( ( ).

... Suppose we launch an electrically neutral object with the same dimensions as an electron toward a hydrogen atom like the one pictured below. If this object is just as likely to strike at any point inside the atom, calculate a reasonable estimate of the probability that there will be a collision. Cal ...

... Suppose we launch an electrically neutral object with the same dimensions as an electron toward a hydrogen atom like the one pictured below. If this object is just as likely to strike at any point inside the atom, calculate a reasonable estimate of the probability that there will be a collision. Cal ...

# 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.