Energy and Entropy: Fall-2020
HW 0: Due Friday 9/25

  1. Introduction to Gradescope

    This homework problem is a chance to try uploading your homework to gradescope. But as long as you have to write something and scan it, the instructor and graders would also like to learn something from you.

    1. What name do you prefered to be called by?
    2. If you want, please share your pronouns.
    3. If the pronunication of your name is possibly confusing, can you describe how I should pronounce your name? You might also consider making a recording of the pronunciation of your name on the Name Coach tab in Canvas.
    4. Do you have an concerns about this course?
    5. Describe one time when you were struggling with something and persistance paid off.
    6. Is there anything else that you'd like us to know about you?

    Scan and upload your answers to Gradescope using the Gradescope tab in Canvas. You can use the scanner in Weniger 304F or a scanning app; Gradescope offers advice and suggested apps at this URL. The preferred format is PDF; photos or JPEG scans are less easy to read (and much larger), and should be used only if no alternative is available.)

    On Gradescope, you will be prompted to associate submitted pages with problem numbers by selecting pages on the right and questions on the left. (In this assignment, there is only one of each.) You may associate multiple problems with the same page if appropriate.

    If you have a problems with this process, please contact your instructor or teaching assistant.

  2. Why Physics? What inspired you to study physics?
  3. Anything else? Is there anything else you'd like me to know about you?
  4. PH 423 photos permission Complete this online survey.
  5. Building the PDM: Instructions In your kits for the Portable Partial Derivative Machine should be the following:
    • A 1ft by 1ft board with 5 holes and measuring tapes (the measuring tapes will be on the top side)
    • 2 S-hooks
    • A spring with 3 strings attached
    • 2 small cloth bags
    • 4 large ball bearings
    • 8 small ball bearings
    • 2 vertical clamp pulleys
    • A ziploc bag containing
      • 5 screws
      • 5 hex nuts
      • 5 washers
      • 5 wing nuts
      • 2 horizontal pulleys
    To assemble the Portable PDM, start by placing the PDM on a table surface with the measuring tapes perpendicular to the table's edge and the board edge with 3 holes closest to you.
    1. one screw should be put through each hole so that the threads stick out through the top side of the board. Next use a hex nut to secure each screw in place. It is not critical that they be screwed on any more than you can comfortably manage by hand.
    2. After securing all 5 screws in place with a hex nut, put a washer on each screw.
    3. Slide a horizontal pulley onto screws 1 and 2 (as labeled above).
    4. On all 5 screws, add a wing nut to secure the other pieces. Again, it does not need to be tightened all the way as long as it is secure enough that nothing will fall off.
    5. Using the middle wingnut/washer/screw (Screw 4), clamp the shortest of the strings tied to the spring.
    6. Loop the remaining 2 looped-ends of string around the horizontal pulleys and along the measuring tape.
    7. Using the string as a guide, clamp the vertical pulleys into place on the edge of the board.
    8. Through the looped-end of each string, place 1 S-hook.
    9. Put the other end of each s-hook through the hole in the small cloth bag.
    Here is a poor photo of the final result, which doesn't show the two vertical pulleys. If you would like, you could view a video of the building process.