esc101-20089-lecture-10-bw-small

In o significant energy is required for the softer

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Unformatted text preview: In) o Significant energy is required for the softer SOFI particle to penetrate the relatively hard tile coating E )"*+ 3"*>6+* 0’ *8’% +8-+ $+ $* B’**$F6" -+ *>G1$"/+ 5-** -/0 #"6’1$+D o Conversely, once tile is penetrated SOFI can cause significant damage E H$/’3 #-3$-4’/* $/ +’+-6 "/"3:D I-F’#" B"/"+3-4’/ 6"#"6J 1-/ 1->*" *$:/$C1-/+ 46" 0-5-:" – =6$:8+ 1’/0$4’/ $* *$:/$C1-/+6D ’>+*$0" ’( +"*+ 0-+-F-*" ’ K’6>5" ’( 3-5B $* LMNO 1> $/ #* P 1> $/ (’3 +"*+ !"#" %& ’"&()* #% +,-./) 0&1%&1/-+02) Three Sources: Modelling Program: Crater modeled damage caused by foam chunk equal to size of ramp that struck Columbia Prev.Flight (STS-87) Data: Analysis of foam impact that occurred on previous shuttle flight Physical Testing: MOD study (1999) analyzed damage to thermal protection system from collisions with objects Key Data: Shows potential for dangerous damage in thermal protection tiles Found an acceptable level of damage in a non-critical area None relevant. Conclusions: Inconclusive: Predicts more damage than has occurred in actual conditions; only predicts tile damage, no data on leading edge of wing Inconclusive: Represents only a single flight; circumstances on Columbia flight are different Inconclusive: Assumes debris chunk striking spacecraft has volume of 3in 3 vs. actual of 1920 in 3 3)1%44)&’"5%&6 "#$%& ’()( #* #$%+$%,-*#.&/ .#*-(, #$*0&%1+$ .#( *0(%& 2(,3 +4 *05 *()&,,#)& 06+)+74(065 #* 4&%+88&$’&’9 The lab report and its components Introduction Methods Results Discussion Apparatus Procedure Observations Measurements Calculations Purpose Theory Background Hypothesis Analysis Interpretation Conclusions Introduction 1.Purpose 2.Theory 3.Background 4.Structural Overview major claim you are setting out to prove relevant knowledge that grounds the test supporting information that may justify the claim or provide evidence for the grounds guide to the organization of the document What does the Introduction do? 1.Purpose 2.Theory 3.Background 4.Structural Overview • Focuses the reader’s attention onto what is unknown • Puts the objective in perspective • Provides confdence that the hypothesis is grounded • Prepares ¡or the discussion o¡ results • Gives necessary understanding to prepare ¡or rest • Ensures readers can fnd everything in predictable ways According to Ohm’s law, the voltage (V) across a resistance (R) is directly proportional to the current fowing through it: V=RI (1). By KirchoFF’s Current Law (KCL), the algebraic sum oF the currents entering any node is zero; similarly by KirchoFF’s Voltage Law (KVL), the algebraic sum oF the voltages around any loop is zero. Also, the current division rule and voltage division rule state that both the current in each resistance connected in parallel and the voltage in each resistance connected in series are divided proportional to the resistance oF the component [1]. These laws are very signi¡cant because they allow us to predict the behaviours oF...
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  • Fall '08
  • Irish
  • Atomic Radius, Electrical impedance, Kirchhoff's circuit laws, Unknown Metal Sample, voltage division rule, lowest resonance frequencies

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