BSA Astronomy Merit Badge
... Be gentle. When you are helping a person with hypothermia, handle him or her gently. Limit movements to only those that are necessary. Don't massage or rub the person. Excessive, vigorous or jarring movements may trigger cardiac arrest. Move the person out of the cold. Move the person to a warm, dry ...
... Be gentle. When you are helping a person with hypothermia, handle him or her gently. Limit movements to only those that are necessary. Don't massage or rub the person. Excessive, vigorous or jarring movements may trigger cardiac arrest. Move the person out of the cold. Move the person to a warm, dry ...
Midterm Exam 2
... 4. You’re driving along at 25 m{s with your aunt’s valuable antiques in the back of your pickup truck when suddenly you see a giant hole in the road 55 m ahead of you. Fortunately, your foot is right beside the brake and your reaction time is zero! Will the antiques be as fortunate? Assume that the ...
... 4. You’re driving along at 25 m{s with your aunt’s valuable antiques in the back of your pickup truck when suddenly you see a giant hole in the road 55 m ahead of you. Fortunately, your foot is right beside the brake and your reaction time is zero! Will the antiques be as fortunate? Assume that the ...
report
... objective was to find out whether the texture of a surface will affect the distance rolled by a marble, and if so, which ramp surface will cause the marble to roll the furthest. Steve Spangler did this by taking strips of different textures such as wood, wax paper and paper towel and rolling a marbl ...
... objective was to find out whether the texture of a surface will affect the distance rolled by a marble, and if so, which ramp surface will cause the marble to roll the furthest. Steve Spangler did this by taking strips of different textures such as wood, wax paper and paper towel and rolling a marbl ...
Galaxies
... All objects that were seen, such as nebulae, were thought to be contained within the Milky Way There were those who disagreed with this conclusion It was not until 1924, that the true location of many of these objects was determined Astronomy 1-2 ...
... All objects that were seen, such as nebulae, were thought to be contained within the Milky Way There were those who disagreed with this conclusion It was not until 1924, that the true location of many of these objects was determined Astronomy 1-2 ...
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.