AS2001 - University of St Andrews
... Near centre of galaxy: Shorter orbit period--> More passes thru spiral shocks --> More star generations --> m lower --> Z higher. (Also, more infall of IGM on outskirts.) ...
... Near centre of galaxy: Shorter orbit period--> More passes thru spiral shocks --> More star generations --> m lower --> Z higher. (Also, more infall of IGM on outskirts.) ...
PreAP Physics Spring Semester Practice Final
... ____ 28. If the distance from the center of a merry-go-round to the edge is 1.4 m, what centripetal acceleration does a passenger experience when the merry-go-round rotates at an angular speed of 0.42 rad/s? ____ 29. Old Faithful geyser in Yellowstone National Park shoots water every hour to a heig ...
... ____ 28. If the distance from the center of a merry-go-round to the edge is 1.4 m, what centripetal acceleration does a passenger experience when the merry-go-round rotates at an angular speed of 0.42 rad/s? ____ 29. Old Faithful geyser in Yellowstone National Park shoots water every hour to a heig ...
Sample final exam
... these stars? Essay section part one — Choose two of the following questions, and answer them in paragraph style or with drawings, as the question states. 19. On page 184, the text states “Understand the fact that we [the Milky Way] are moving toward M31 and that the Large Magellenic Cloud [LMC] is m ...
... these stars? Essay section part one — Choose two of the following questions, and answer them in paragraph style or with drawings, as the question states. 19. On page 184, the text states “Understand the fact that we [the Milky Way] are moving toward M31 and that the Large Magellenic Cloud [LMC] is m ...
Chapter 1 Quick Review
... The purpose of this review is to refresh your memory. Physics is a cumulative subject, so make it sure that you understand basic concepts and typical problem solving techniques in previous chapters before moving on to a new chapter. ___________________________________________________________________ ...
... The purpose of this review is to refresh your memory. Physics is a cumulative subject, so make it sure that you understand basic concepts and typical problem solving techniques in previous chapters before moving on to a new chapter. ___________________________________________________________________ ...
Space Syllabus Summary
... Newton’s Law of Universal Gravitation is very important in predicting the motions of satellites around the Earth and planets around the sun. By equating the formula for gravitational force, F = GMm/d2 with the formula for centripetal force, F = mv2, a range of formulae can be derived which give val ...
... Newton’s Law of Universal Gravitation is very important in predicting the motions of satellites around the Earth and planets around the sun. By equating the formula for gravitational force, F = GMm/d2 with the formula for centripetal force, F = mv2, a range of formulae can be derived which give val ...
Acceleration
... position D. This is the bottom of the longest descent, so the coaster has had the longest time to accelerate. (Refer to The Other Great Race) ...
... position D. This is the bottom of the longest descent, so the coaster has had the longest time to accelerate. (Refer to The Other Great Race) ...
lec06
... Then the centripetal force is m v2 / r = 20 * 2 / 4 = 49.3 N. Because your sister is moving in a circle at a constant speed, we know the net force on her. However, we don’t know most of the individual physical forces that make up this total. These include her weight (which we know = 196 N down), th ...
... Then the centripetal force is m v2 / r = 20 * 2 / 4 = 49.3 N. Because your sister is moving in a circle at a constant speed, we know the net force on her. However, we don’t know most of the individual physical forces that make up this total. These include her weight (which we know = 196 N down), th ...
AP-PhysC-Sim-Curriculum
... Quantitative energy and time graph, energy and position graph; qualitative energy bar graphs, pie chart; variable friction and gravity, moveable PE reference line, mass, slow motion option, student builds ramp shapes. Other simulations with energy bar graphs: Masses and Springs ...
... Quantitative energy and time graph, energy and position graph; qualitative energy bar graphs, pie chart; variable friction and gravity, moveable PE reference line, mass, slow motion option, student builds ramp shapes. Other simulations with energy bar graphs: Masses and Springs ...
Chapter-04-1 - High Point University
... A girl pulls her red wagon in the +x direction with a force of 50 N at an angle of 30 with respect to the horizontal. If the wagon moves at a constant velocity, what is the net force on the wagon? ...
... A girl pulls her red wagon in the +x direction with a force of 50 N at an angle of 30 with respect to the horizontal. If the wagon moves at a constant velocity, what is the net force on the wagon? ...
Lecture 5
... Kepler‟s laws result naturally from Newton‟s laws of motion and Newton‟s law of gravity. Kepler‟s laws of planetary motion, as modified by Newton, are ...
... Kepler‟s laws result naturally from Newton‟s laws of motion and Newton‟s law of gravity. Kepler‟s laws of planetary motion, as modified by Newton, are ...
chapter7
... A line drawn from the Sun to any planet sweeps out equal areas in equal time intervals. The square of the orbital period of any planet is proportional to cube of the average distance from the Sun to the planet. ...
... A line drawn from the Sun to any planet sweeps out equal areas in equal time intervals. The square of the orbital period of any planet is proportional to cube of the average distance from the Sun to the planet. ...
Forces - faculty at Chemeketa
... For this alleged violation to be true, we must know both the total energy of the universe both before and after the big bang and show that they are different (putting aside objections that there is no such thing as “before the big bang”). No serious scientist claims to know with certainty the total ...
... For this alleged violation to be true, we must know both the total energy of the universe both before and after the big bang and show that they are different (putting aside objections that there is no such thing as “before the big bang”). No serious scientist claims to know with certainty the total ...
atomic number
... • Cathode rays travel in straight lines The cathode ray can push a small paddle wheel up an incline, against the force of gravity. • cathode rays carry energy and do work. The cathode ray is deflected from a straight line path by a magnetic field. • suggests that the two are related in some way. ...
... • Cathode rays travel in straight lines The cathode ray can push a small paddle wheel up an incline, against the force of gravity. • cathode rays carry energy and do work. The cathode ray is deflected from a straight line path by a magnetic field. • suggests that the two are related in some way. ...
Other Galaxies, their Distances, and the Expansion of the Universe
... Hubble s Discovery In the 1920s, Edwin Hubble used the distance ladder (based on Cepheid variable stars) to measure the distances of about 50 galaxies. n This work proved that the Andromeda galaxy was not part of the Milky Way. n Hubble and his staff then measured the redshifts (remember the Do ...
... Hubble s Discovery In the 1920s, Edwin Hubble used the distance ladder (based on Cepheid variable stars) to measure the distances of about 50 galaxies. n This work proved that the Andromeda galaxy was not part of the Milky Way. n Hubble and his staff then measured the redshifts (remember the Do ...
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.