CHALLENGER'S LOST LESSONS - ER - NASA

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42The field of the cylindrical magnet projects from the end ofthe magnet and loops around the iron cylinder’s side. The causes theiron filings to stick out like hair brush bristles on the ends of themagnet though they lie flat against the side of the magnetic cylinder.The overall shape of the filings combine to show approximately theshape of the magnetic field’s lines of force in three dimensions.Hopefully, this shape wouldhave been similar to that of Christa’s magnetic chamber. The lostlesson’s iron-like filings would have clustered about the chamber’selectro-magnet in like fashion.Discussion: Bob Mayfield’s discussion of magnetic filingbehavior in zero-G versus one-G seems sound. However, watchingthe KC-135 video shows the filings behaving in a fashion that mightcompromise the on-orbit experiment. Performing the classroommagnetic experiment helps to understand difficulties that might havebeen encountered by Christa. Since the force of the electromagnet isquite weak, and the filings would be randomly dispersed about theclear chamber, would the drawing power be sufficient to pull themetal filings into a lines-of-force pattern, even in zero-G? Perhaps,Christa would have had to move the chamber back and force to assistthe collection of the particles about the center electro-magnet,assisting the drawing power of the field in capturing the filings.Finally: Christa performed the magnetism demonstrationboth without gravity, on the KC-135 zero G aircraft, and in theshuttle mock-up at the Johnson Space Center. Carefully view bothvideos. What, if anything, is alike and what is different about thetwo times the experiment was practiced? Click on the videos belowfor your evaluation. (Since the experiment was only designed towork in orbit, i.e., with zero gravity, neither the ground nor KC-135practice trials actuated the electro-magnet. However, the KC-135trial did have the file-like particles in the magnetism chamber.)What deserves consideration and investigation were theproposed ways Christa suggested moving the magnetic chamberduring the course of the experiment. List Christa’s suggestions.
43How do you believe Christa’s suggestions would benefit theperformance of the experiment? (The discussion above suggests theanswer.)Hold down CTRL Key and click on:magnetism_chamber_ground_demonstration.wmvThe video is played in Media PlayerHold down CTRL Key and click on:magnetic_chamber_zero_G_practice.wmv
Page 1 and 2: CHALLENGER’S LOST LESSONSProject
Page 3 and 4: 3CHALLENGER’S LOST LESSONS[Backgr
Page 5 and 6: 5Obviously, because of the loss of
Page 7 and 8: 7collectively. Other constraints we
Page 9 and 10: 9Hydroponics ChamberAnother aspect
Page 11 and 12: 11been ingested by crewmembers or e
Page 13 and 14: 13of the mass of each other. This w
Page 15 and 16: 15effervescent tablet, and a water
Page 17 and 18: 17would have been observed instead
Page 19 and 20: 19with an insert to provide frictio
Page 21 and 22: 21Challenger’s Live Lost LessonsW
Page 23 and 24: 23[For a preliminary or concluding
Page 25 and 26: 25THE LOST HYDROPONICS CHAMBER LESS
Page 27 and 28: 27Hold down CTRL Key and click here
Page 29 and 30: 29i.e., the leaves may simply droop
Page 31 and 32: 31After each daily spraying of the
Page 33 and 34: 332. What impact would ambient ligh
Page 35 and 36: 35Christa Practicing Bar Magnet in
Page 37 and 38: 37Observe the movement of the right
Page 39 and 40: 39would permit filming. The movie w
Page 41: 41What Happened?(Study the video ta
Page 45 and 46: 45the final lines of force pattern.
Page 47 and 48: 47permanent magnet.)The assembly of
Page 49 and 50: 49THE LOST NEWTON’S LAWS LESSON
Page 51 and 52: 51Such an experiment reminds educat
Page 53 and 54: 53equal for both projectiles. Cups
Page 55 and 56: 55Process:Cutaway view of spring re
Page 57 and 58: 57Questions to Answer:1. What did y
Page 59 and 60: 59THE LOST EFFERVESCENCE LESSONThe
Page 61 and 62: 61dioxide. The gas was contained in
Page 63 and 64: 63THE LOST CHROMATOGRAPHY LESSON“
Page 65 and 66: 65Hold down CTRL Key and click on:c
Page 67 and 68: 67of Christa to see how her apparat
Page 69 and 70: 69THE LOST SIMPLE MACHINES LESSONIn
Page 71 and 72: 71station actually has a trolley ty
Page 73 and 74: 733) A screwdriver and wood screws.
Page 75 and 76: 75*3. Hammer a nail lightly into th
Page 77 and 78: 77What Would Have Happened on Chall
Page 79 and 80: 79through” to view the set up for
Page 81 and 82: 81The “The Ultimate Field Trip”
Page 83 and 84: 834. If you were to teach the seven
Page 85 and 86: 85Unlike, the first live lesson whi
Page 87 and 88: 87Concerning the tripod, Pilot Mike
Page 89 and 90: 89A Classroom Version of Christa’
Page 91 and 92: 91easily done in the KC-135 aircraf
Page 93 and 94:
93and gaseous substances on earth a
Page 95 and 96:
95Wright Brothers’ AirplaneIntern
Page 97:
97Instructions for using the attach
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CHALLENGER'S LOST LESSONS - ER - NASA

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