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Announcements
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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
Iclicker Question #0
Please fill out course evaluations (for this course and all of your other
courses)
<https://www.njit.edu/CourseEval>
When is the due date/time for online course evaluations?
A)
B)
C)
D)
E)
Weds May 11th, Last day of classes, midnight
Thursday May 12th, Reading day, noon
Thursday May 12th, Reading day, midnight
Monday May 16th, Phys 111 Exam day, 11:30AM
Thursday, May 19th , last day of final exams, midnight
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: <https://www.njit.edu/CourseEval> 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.
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)
B)
C)
D)
E)
Gottfried Leibniz
Sheldon Cooper
James Joule
James Watt
Isaac Newton
Gravitational Force – Fundamental Force of
Nature
For spherically symmetric objects, you can
replace them by point masses
Cavendish Experiment – Measuring G
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.
Kepler’s First Law – The Ellipse
Eccentricity =e
0<e<1
For a circle, e=0.
Two orbits with widely varying eccentricies
Kepler’s Second Law – Swept Area
Angular momentum conserved
Gravitational Field – Action at a Distance
Close to the earth…
Iclicker Question #3
Which of the following sentences is completely correct concerning
energy, momentum and planetary gravitation
A)
B)
C)
D)
E)
Total Energy (kinetic plus gravitational potential is conserved).
Potential energy is conserved but not kinetic
Total Energy is conserved but not angular momentum
Total Energy not conserved by angular moment is conserved.
Total energy and angular momentum is conserved.
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.
Detecting Black Holes