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Galaxy clusters - University of Iowa Astrophysics
Galaxy clusters - University of Iowa Astrophysics

... source, we can figure out the total mass in the lens. This provides an independent confirmation of dark matter. • A lense can act as a huge telescope. The deepest images of the most distant galaxies are obtained with clusters acting as gravitational lenses. ...
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Relativistic Dynamics

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GRAVITY - Wilson Middle School

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... Both values are the same because the change in position is the same for both. d. What is the difference in electric potential between the negative plate and a point midway between the plates? ...
Curvature Demo
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Version B - UCSB High Energy Physics Home Page
Version B - UCSB High Energy Physics Home Page

Galaxy clusters - University of Iowa Astrophysics
Galaxy clusters - University of Iowa Astrophysics

... source, we can figure out the total mass in the lens. This provides an independent confirmation of dark matter. • A lense can act as a huge telescope. The deepest images of the most distant galaxies are obtained with clusters acting as gravitational lenses. ...
Inclined Planes, and Pulleys
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... Machines are used to make work more convenient by multiplying force at the expense of speed, or vice versa. A machine does not multiply work, however. The work output of a machine is never greater than the work input; thus the law of conservation of energy is not contradicted. In fact, the useful wo ...
Physics 211 Week 9 Rotational Kinematics and Energy: Bowling
Physics 211 Week 9 Rotational Kinematics and Energy: Bowling

... M mass of the pulley R radius of the pulley h vertical distance of block 2 from the floor µ coefficient of kinetic friction between the table and block 1 We are looking for v the speed of block two just before it hits the ground - The work done by friction is the force of friction times the distance ...
work_energy1151
work_energy1151

... Work Done by Gravity In lifting an object of weight mg by a height h, the person doing the lifting does an amount of work W = mgh. If the object is subsequently allowed to fall a distance h, gravity does work W = mgh on the object. ...
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Mass spectroscopy - Teach-n-Learn-Chem
Mass spectroscopy - Teach-n-Learn-Chem

... • This conclusion contradicted Dalton’s postulate and was not widely accepted by fellow physicists and chemists of his day. • Since any electrode material produces an identical ray, cathode ray particles are present in all types of matter - a universal negatively charged subatomic particle later nam ...
mass spectroscopy
mass spectroscopy

... • This conclusion contradicted Dalton’s postulate and was not widely accepted by fellow physicists and chemists of his day. • Since any electrode material produces an identical ray, cathode ray particles are present in all types of matter - a universal negatively charged subatomic particle later nam ...
motion
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Physics on the Move

... Advanced Unit 4: Physics on the Move Friday 18 June 2010 – Morning Time: 1 hour 35 minutes You must have: Ruler ...
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... straight line with constant speed unless acted upon by an unbalanced force. ...
Chapter 19 Outline The First Law of Thermodynamics - Help-A-Bull
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... • Rocket propulsion ...
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... We obtain the formula by solving for time in the second equation ...
Newtonian Gravity and Special Relativity 12.1 Newtonian Gravity
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Stellar Structure — Polytrope models for White Dwarf density profiles

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... Now, what determines the luminosity of a star? The energy leak makes a star shine. But this leakage must be slow to maintain a star steady. A feedback mechanism is needed, like a thermometer. The energy generation also needs to be balanced by energy removal, but not too fast. Then we call the materi ...
Untitled - U of M Physics
Untitled - U of M Physics

EVOLUION OF SUN LIKE STAR
EVOLUION OF SUN LIKE STAR

< 1 ... 71 72 73 74 75 76 77 78 79 ... 90 >

Negative mass

In theoretical physics, negative mass is a hypothetical concept of matter whose mass is of opposite sign to the mass of normal matter, e.g. −2 kg. Such matter would violate one or more energy conditions and show some strange properties, stemming from the ambiguity as to whether attraction should refer to force or the oppositely oriented acceleration for negative mass. It is used in certain speculative theories, such as on the construction of wormholes. The closest known real representative of such exotic matter is a region of pseudo-negative pressure density produced by the Casimir effect. Although general relativity well describes gravity and the laws of motion for both positive and negative energy particles, hence negative mass, it does not include the other fundamental forces. On the other hand, although the Standard Model well describes elementary particles and the other fundamental forces, it does not include gravity, even though gravity is intimately involved in the origin of mass and inertia. A model that explicitly includes gravity along with the other fundamental forces may be needed for a better understanding of the concept of negative mass.
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