Newton`s Laws ppt - Dr. Robert MacKay
... On Earth, where gravity is present, an experiment is performed on a puck on an air hockey table, with negligible friction. A constant horizontal force is applied to the puck and its acceleration is measured. The experiment is performed on the same puck in the far reaches of outer space where both fr ...
... On Earth, where gravity is present, an experiment is performed on a puck on an air hockey table, with negligible friction. A constant horizontal force is applied to the puck and its acceleration is measured. The experiment is performed on the same puck in the far reaches of outer space where both fr ...
GSCI 101A - Section 006
... boiling point is at 681 K; the latent heat of vaporization is 189,000 J/kg. You wish to boil off 4.2 kg of this substance that is initially at 155 K. How much heat is required? a) 888,000 J b) 2,210,000 J c) 2,870,000 J d) 2,150,000 J d) First, the temperature of the solid must be raised to the mel ...
... boiling point is at 681 K; the latent heat of vaporization is 189,000 J/kg. You wish to boil off 4.2 kg of this substance that is initially at 155 K. How much heat is required? a) 888,000 J b) 2,210,000 J c) 2,870,000 J d) 2,150,000 J d) First, the temperature of the solid must be raised to the mel ...
Chapter-2-study
... 12. Describe how gravity and air resistance are related to an object’s terminal velocity. _______________________________________________________________ _______________________________________________________________ 13. Why can friction make observing Newton’s first law of motion difficult? ______ ...
... 12. Describe how gravity and air resistance are related to an object’s terminal velocity. _______________________________________________________________ _______________________________________________________________ 13. Why can friction make observing Newton’s first law of motion difficult? ______ ...
Summary: Nuclear burning in stars
... • Spiral arms have higher density than space between arms • Excess gravitational attraction slows down gas, stars when they pass through spiral arm in course of their orbits. • Î spiral arms are a traffic jam ...
... • Spiral arms have higher density than space between arms • Excess gravitational attraction slows down gas, stars when they pass through spiral arm in course of their orbits. • Î spiral arms are a traffic jam ...
Review Sheet
... chapter. Look for the answers to these questions in your book and in your notes. These questions do not necessarily cover everything in the chapter. They just give you an idea of some of the important topics. Write all of your answers on a separate sheet of paper. There will not be enough room for y ...
... chapter. Look for the answers to these questions in your book and in your notes. These questions do not necessarily cover everything in the chapter. They just give you an idea of some of the important topics. Write all of your answers on a separate sheet of paper. There will not be enough room for y ...
Slide 1 - The Eclecticon of Dr French
... Example 2: A block of 10kg is in equilibrium ‘at the point of sliding’ uphill (this is called limiting friction). If the plane is inclined at 30o and the tension is at 45o to the plane, what is T given a coefficient of friction of m = 1/5 ? ...
... Example 2: A block of 10kg is in equilibrium ‘at the point of sliding’ uphill (this is called limiting friction). If the plane is inclined at 30o and the tension is at 45o to the plane, what is T given a coefficient of friction of m = 1/5 ? ...
Exam #: Printed Name: Signature: PHYSICS DEPARTMENT
... Two weights, each with mass m, are connected with a massless string and suspended from two massless, frictionless pulleys in a gravitational field as shown above. Denote the length of string from pulley A to mass A by x. The length of string from pulley B to mass B is L − x, where L is fixed by the ...
... Two weights, each with mass m, are connected with a massless string and suspended from two massless, frictionless pulleys in a gravitational field as shown above. Denote the length of string from pulley A to mass A by x. The length of string from pulley B to mass B is L − x, where L is fixed by the ...
Name - Physics
... to the circle) that you are applying to the rope. The diagram below shows the view as if you are looking down from above on the object. ...
... to the circle) that you are applying to the rope. The diagram below shows the view as if you are looking down from above on the object. ...
lecture22
... Example: Two wheels with fixed hubs, each having a mass of 1 kg, start from rest, and forces are applied as shown. Assume the hubs and spokes are massless, so that the moment of inertia is I = mR2. In order to impart identical angular accelerations, how large must F2 be? ...
... Example: Two wheels with fixed hubs, each having a mass of 1 kg, start from rest, and forces are applied as shown. Assume the hubs and spokes are massless, so that the moment of inertia is I = mR2. In order to impart identical angular accelerations, how large must F2 be? ...
The physics of negative mass
... The idea of a negative mass is conjectural, since no material object has ever been found that can be shown by experiment to have a negative mass. Nevertheless, it will be shown below that the mass equivalent of the energy in a gravitational field is negative, therefore, it may be instructive to spec ...
... The idea of a negative mass is conjectural, since no material object has ever been found that can be shown by experiment to have a negative mass. Nevertheless, it will be shown below that the mass equivalent of the energy in a gravitational field is negative, therefore, it may be instructive to spec ...
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.