Astronomy 210, Spring Semester 2009
Cuesta College, San Luis Obispo, CA
Announcing the question for students to ponder while reading ahead for the next lecture:
Instructor: "Here's your 'question to ponder': 'What makes stars twinkle?'"
Student: "Because of that song children sing."
Instructor: "Then make them stop singing it!"
20090213
Learning never ends...
090122-1070814http://flickr.com/photos/waiferx/3229797006/
Originally uploaded by Waifer X
Learning never ends...but it may not necessarily begin.
20090212
Physics clicker question: free fall acceleration
Physics 205A, Spring Semester 2009
Cuesta College, San Luis Obispo, CA
Cf. Giambattista/Richardson/Richardson, Physics, 2/e, Multiple-Choice Question 2.1
Students were asked the following clicker questions (Classroom Performance System, einstruction.com) in the middle of their learning cycle (after being asked about the acceleration while the ball is traveling downwards, and while traveling upwards):
A ball is thrown and released such that it initially travels upwards. While it is momentarily at its highest point, its acceleration is __________. (Up = +y direction; neglect air resistance ("free fall").)
(A) +9.80 m/s^2.
(B) 0 m/s^2.
(C) –9.80 m/s^2.
(D) (More than one of the above choices.)
(E) (None of the above choices.)
(F) (I'm lost, and don't know how to answer this.)
Sections 30880, 30881
(A) : 0 students
(B) : 30 students
(C) : 13 students
(D) : 0 students
(E) : 0 students
(F) : 0 students
Correct answer: (C)
A whole-class discussion on velocity versus time graphs for objects in free fall immediately followed the tallying of results. All v_y(t) graphs for free fall may have different initial v_i,y values, but would all have the same negative slopes, and thus acceleration values of -9.80 m/s^2.
Cuesta College, San Luis Obispo, CA
Cf. Giambattista/Richardson/Richardson, Physics, 2/e, Multiple-Choice Question 2.1
Students were asked the following clicker questions (Classroom Performance System, einstruction.com) in the middle of their learning cycle (after being asked about the acceleration while the ball is traveling downwards, and while traveling upwards):
A ball is thrown and released such that it initially travels upwards. While it is momentarily at its highest point, its acceleration is __________. (Up = +y direction; neglect air resistance ("free fall").)
(A) +9.80 m/s^2.
(B) 0 m/s^2.
(C) –9.80 m/s^2.
(D) (More than one of the above choices.)
(E) (None of the above choices.)
(F) (I'm lost, and don't know how to answer this.)
Sections 30880, 30881
(A) : 0 students
(B) : 30 students
(C) : 13 students
(D) : 0 students
(E) : 0 students
(F) : 0 students
Correct answer: (C)
A whole-class discussion on velocity versus time graphs for objects in free fall immediately followed the tallying of results. All v_y(t) graphs for free fall may have different initial v_i,y values, but would all have the same negative slopes, and thus acceleration values of -9.80 m/s^2.
20090211
Physics 205A laboratory, Cuesta College
090130-1070954http://flickr.com/photos/waiferx/3264478669/
Originally uploaded by Waifer X
Lab instructor Ms. Mitra Farahmand answers questions from students Courtney and Alexis in Physics 205A lab in the newly renovated 2100 building.
090130-1070955http://flickr.com/photos/waiferx/3264481041/
Originally uploaded by Waifer X
Layout of student computer stations in Room 2101 of the newly renovated 2100 building at Cuesta College.
20090203
Discover your weight on Earth, the Moon, and Mars
090201-1070957http://www.flickr.com/photos/waiferx/3247179968/
Originally uploaded by Waifer X
090201-1070958http://www.flickr.com/photos/waiferx/3247182114/
Originally uploaded by Waifer X
Discover your weight on Earth, the Moon, and Mars! Pay weight scale, Union 76 gas station, Skyline Boulevard/Avenal Cutoff Road exit at I-5, Avenal, CA.
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