PHYS101 - Concord University
... Mars has two moons, each much smaller than the earth’s moon. The smaller of these two bodies, Deimos, isn’t quite spherical, but we can model it as a sphere of radius 6.3 km. Its mass is 1.8 × 1015 kg. At what speed would a projectile move in a very low orbit around Deimos? ...
... Mars has two moons, each much smaller than the earth’s moon. The smaller of these two bodies, Deimos, isn’t quite spherical, but we can model it as a sphere of radius 6.3 km. Its mass is 1.8 × 1015 kg. At what speed would a projectile move in a very low orbit around Deimos? ...
What Goes Up, Must Come Down
... motion, the apple also would attract Earth. Thus, the force of attraction also must be proportional to the mass of Earth. This attractive force that exists between all objects is known as gravitational force. Newton was so confident that the laws governing motion on Earth would work anywhere in the ...
... motion, the apple also would attract Earth. Thus, the force of attraction also must be proportional to the mass of Earth. This attractive force that exists between all objects is known as gravitational force. Newton was so confident that the laws governing motion on Earth would work anywhere in the ...
Momentum - Jobworks Physics
... Momentum and Impulse The concepts in the above paragraph should not seem like abstract information to you. You have observed this a number of times if you have watched any contact sport such football. In football, the defensive players apply a force for a given amount of time to stop the momentum o ...
... Momentum and Impulse The concepts in the above paragraph should not seem like abstract information to you. You have observed this a number of times if you have watched any contact sport such football. In football, the defensive players apply a force for a given amount of time to stop the momentum o ...
The cosmic distance scale
... Earlier it was mentioned that all SN Ia ought to have the same absolute magnitude because the white dwarf star of the system explodes when it reaches a certain mass (which applies everywhere in the universe). This is however not exactly true, different white dwarfs have different atmospheric composi ...
... Earlier it was mentioned that all SN Ia ought to have the same absolute magnitude because the white dwarf star of the system explodes when it reaches a certain mass (which applies everywhere in the universe). This is however not exactly true, different white dwarfs have different atmospheric composi ...
Calculate the density of the 17.2-g object to the left. For all problems
... The pages that follow contain the many of the shortsheets that we completed collaboratively in class. I have given you these again to review and practice. Since, we completed all of these exclusively in class, you should have all of the answers in your science notebook in the shortsheet section to c ...
... The pages that follow contain the many of the shortsheets that we completed collaboratively in class. I have given you these again to review and practice. Since, we completed all of these exclusively in class, you should have all of the answers in your science notebook in the shortsheet section to c ...
creating a universe, a conceptual model
... a short range but decreases with distance, the electromagnetic and gravitational force strengths decrease inversely with distance squared but have unlimited range. Their relative strengths vary enormously (1039 times between electromagnetic and gravitational). How could they be more different? As re ...
... a short range but decreases with distance, the electromagnetic and gravitational force strengths decrease inversely with distance squared but have unlimited range. Their relative strengths vary enormously (1039 times between electromagnetic and gravitational). How could they be more different? As re ...
Multiple-Choice Questions
... ___ 28. The slowing down of a car in a given time is called velocity. ___ 29. Newton has 4 laws of motions. ___ 30. One of the first scientists to study the rate of gravitational acceleration was Newton. ___ 31. In the metric system, the gravitational acceleration has been found to be 9.8 meters per ...
... ___ 28. The slowing down of a car in a given time is called velocity. ___ 29. Newton has 4 laws of motions. ___ 30. One of the first scientists to study the rate of gravitational acceleration was Newton. ___ 31. In the metric system, the gravitational acceleration has been found to be 9.8 meters per ...
ma F ma F ma F am FF = ∑ = ∑ = ∑ ≠ = = ∑ 0 о оо
... We have an idea of what mass is from everyday life. In physics: Mass (in Phys 207) is a quantity that specifies how much inertia an object has (i.e. a scalar that relates force to acceleration) (Newton’s Second Law) Mass is an inherent property of an object. Mass and weight are different qua ...
... We have an idea of what mass is from everyday life. In physics: Mass (in Phys 207) is a quantity that specifies how much inertia an object has (i.e. a scalar that relates force to acceleration) (Newton’s Second Law) Mass is an inherent property of an object. Mass and weight are different qua ...
Interpretation of the Helix Planetary Nebula using Hydro
... According to HGD, SNe Ia explosions always occur in PNes within massive dense (protoglobular-star-cluster; ie, PGC) clumps of frozen primordial planets (primordial-fog-particles or PFPs) that form larger planets and finally stars as binaries. Planetary nebulae are not just brief puffs of illuminated ...
... According to HGD, SNe Ia explosions always occur in PNes within massive dense (protoglobular-star-cluster; ie, PGC) clumps of frozen primordial planets (primordial-fog-particles or PFPs) that form larger planets and finally stars as binaries. Planetary nebulae are not just brief puffs of illuminated ...
Durham Research Online
... discs Purcell et al. (2009) concluded that the co-rotating dark matter fraction near the Sun is at most 30%. A hydrodynamical “zoom” simulation of a galaxy was found to have formed a dark disc contributing around 25% of the DM at the solar radius co-rotating with the stars (Ling et al. 2010). On the ...
... discs Purcell et al. (2009) concluded that the co-rotating dark matter fraction near the Sun is at most 30%. A hydrodynamical “zoom” simulation of a galaxy was found to have formed a dark disc contributing around 25% of the DM at the solar radius co-rotating with the stars (Ling et al. 2010). On 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.