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Announcements Grades for Exam 3 posted. High 16, Low 1, Average 8.56 Solutions to Common 3 posted shortly Final exam – ALL MULTIPLE CHOICE Practice Exams to be Posted shortly

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Iclicker Question #0 Please fill out course evaluations (for this course and all of your other courses) When is the due date/time for online course evaluations? A)Weds May 11 th, Last day of classes, midnight B)Thursday May 12 th, Reading day, noon C)Thursday May 12 th, Reading day, midnight D)Monday May 16 th, Phys 111 Exam day, 11:30AM E)Thursday, May 19 th, last day of final exams, midnight

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NJIT COURSE EVALUATION for FALL 2013 Your input does make a difference! It is important that as many students as possible complete the course evaluation. Your feedback is used to help the university evaluate and improve courses and instruction. The course evaluation site will be active from 9 am Tuesday, November 12th until midnight of Thursday, December 12th. The online course evaluations can be accessed 24/7 from any location via the internet. The course evaluation consists of only 11 rating questions and 3 open-ended comment questions. It should take less than 3 minutes to complete. Please visit URL: to complete the online course evaluation form for your course(s). Use your NJIT UCID and UCID password (same as “Highlander Pipeline”) to login. PLEASE NOTE: The 11 rating questions refer to PROF. FEDERICI. If you have comments on your RECITATION instructor, please use the open-ended comment questions.

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Iclicker Question #1 Which famous scientist can you blame for both developing the laws of physics AND inventing calculus? WHOSE TO BLAME for both Phys 111 and Math 111? A)Gottfried Leibniz B)Sheldon Cooper C)James Joule D)James Watt E)Isaac Newton

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Gravitational Force – Fundamental Force of Nature

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For spherically symmetric objects, you can replace them by point masses

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Cavendish Experiment – Measuring G

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Iclicker Question #2 Which statement is false regarding gravitational forces? A)The weight of an object is different if it is at sea level on the New Jersey shore compared to its value if it is on top of Mt. Everest. B)The acceleration due to gravity g depends on where on the earths surface it is measured. C)The gravitational force of the earth on the moon depends on the velocity of the moon relative to the earth. D)The acceleration of an object in geo-synchronous orbit (fixed above a specific location on the earth’s surface) is NOT zero. E) mass, inertial mass, and gravitational mass are all the same thing.

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Kepler’s First Law – The Ellipse For a circle, e=0. Eccentricity =e 0

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Two orbits with widely varying eccentricies

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Kepler’s Second Law – Swept Area

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Angular momentum conserved

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Gravitational Field – Action at a Distance Close to the earth…

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Iclicker Question #3 Which of the following sentences is completely correct concerning energy, momentum and planetary gravitation A)Total Energy (kinetic plus gravitational potential is conserved). B)Potential energy is conserved but not kinetic C)Total Energy is conserved but not angular momentum D)Total Energy not conserved by angular moment is conserved. E)Total energy and angular momentum is conserved.

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Iclicker Question #4 Which of the following statements concerning black holes is correct? A)Black holes result from mathematicians dividing by zero without regard for consequences. B)Black holes are so vain, that they think that they are the center of the galaxy. C)A black hole and the federal deficit are equivalent D)It feels like physics class…. I can not seem to get out of it. E)Black holes can not be seen.

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Detecting Black Holes

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