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Final Exam Review
Final Exam Review

PROBLEM SET #8 SOLUTIONS AST142 1. Free fall timescale and
PROBLEM SET #8 SOLUTIONS AST142 1. Free fall timescale and

Energy Level diagram for a spin-1/2 nucleus as a function of
Energy Level diagram for a spin-1/2 nucleus as a function of

... The z-component of the nuclear angular momentum is related to the z-component of the nuclear spin. Recall in quantum mechanics that a total angular momentum of L has 2(L+1) components. The same is true for nuclear angular momentum and hence spin. (this gives rise to the different orbital structures) ...
Semester Exam Study Guide
Semester Exam Study Guide

Dark matter
Dark matter

... dark matter, it doesn’t “clump up”). Since its energy density is so low everywhere, how do we know the dark energy’s there? ...
5 Elements of nuclear physics 5.1 Strong interaction and structure of atomic nuclei
5 Elements of nuclear physics 5.1 Strong interaction and structure of atomic nuclei

... (6.27) is written as 32/3 π 4/3 a0 (5/3)~2 −1/3 ...
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F = ma Cart Lab

PWE 19-2: Measuring Isotopes with a Mass Spectrometer
PWE 19-2: Measuring Isotopes with a Mass Spectrometer

... recall from Chapter 17 that 1 V = 1 J>C = 1 N # m>C. So we can write the speed as ...
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Basic Physics Semester 1 Final Review Thing Name: Basic Physics
Basic Physics Semester 1 Final Review Thing Name: Basic Physics

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Midterm Review
Midterm Review

... 13. Newton’s Third Law of Motion describes a. Why forces act in pairs b. All aspects of an object’s motion c. Motion when a balanced force acts on an object. d. Motion when an unbalanced force acts on an object. 14. A force a. Can cause an object to change its motion c. Is a push or pull b. Gives e ...
Estimate the Kelvin-Helmholtz timescale for a 5 solar mass star on
Estimate the Kelvin-Helmholtz timescale for a 5 solar mass star on

SS Review for Final
SS Review for Final

Experiments that revealed the Structure of the Atom
Experiments that revealed the Structure of the Atom

... Rutherford and his team (Geiger and Marsden) bombarded a number of different thin metal foils with alpha (α) particles from a radioactive source. Alpha particles are tiny, heavy particles with a positive charge. Particles passing through the foil would strike a screen coated with zinc sulfide, and a ...
Life of a star
Life of a star

... mechanics come to help us. However one must not be surprised by the leap from one scientific discipline to another. The different scientific branches support each other and more and more often their discoveries overlap to give a single more complete picture of the situation. So, quantum mechanics sa ...
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1. Define the following terms: work kinetic energy mechanical

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The Beginning of Modern Astronomy

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IB 2.3 Work and Energy Dec 6 Agenda

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21.3 Finding Scalar Potentials

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Lifetime of Stars/ Fusion powers the stars—11 Oct

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Units and Material Balances PSE 476/WPS 576 Fall 2012

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PP Mass spectrometer and atoms
PP Mass spectrometer and atoms

... The first mass spectrometer was built in 1918 by Francis W Aston, a student of J J Thomson, the man who discovered the electron. Aston used the instrument to show that there were different forms of the same element. We now call these isotopes. In a mass spectrometer, particles are turned into positi ...
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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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