lab1989S

# lab1989S - PHYSICS 221 - SPRING 1989 - FINAL This...

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Unformatted text preview: PHYSICS 221 - SPRING 1989 - FINAL This laboratory final consists of 8 questions, each worth 8 point toward your total score for the course. INCH . .01 . iII'I.III!ll|ll‘lll|'ll.lllllf I I olg*i£51 II! 2 456) 6931 » :;'_~;I-*:e1o'l> 37720 4 so " so 70 so +qwqqqqhmqnnhyyvphpﬂpuhuﬂnuhuﬂx , I 1 z 3.1 s i 1 s i I l°5mm . Anilﬂi h Illillll'l'lllll'lll' my 7", 3 [7.0 co": mm A Sula 0 muemiek \ - ‘ A) 0-70 mm C) 5.0 mm D) 7.0 cm E) 8.0 mm 7'0 mm 58. Which of the following best describes the information recorded on the spark tape mounted along the side of an air track? page.“ A) a complete record of the motion of the cart; B) the position of the cart at all times as the cart is displaced; C) the velocity of the cart at all times as the cart is displaced; D) the position of the cart at random times;. <::E> the position of the cart at uniformly spaced intervals of time. + 59. Referring to the "Forces and Vectors" experiment, what is the vertical component of the total force acting on an instructor (mass of 80 kg) who is resting quietly on the hanging seat? (in Newtons) (Assume the upward direction is positive.) A) +784 B)-784 C) -80 E) the answer cannot be determined us ng the available information. A A Sine; 6:30) Fiﬁ") ’” O :Formrerﬁecjb {IL/6) +X #— v 7%: mi. —9 . W)th = “mjvax ‘ _2_ i5 .213 will \$te {I m}: V6; 4—. Lmt‘r V 2 = released ‘90?“ SPr‘hmﬁ. , Gian). 60. In the experihent’téht used t e spring gun to fire the metal ball, the * gun assembly was clamped firmly to the table. However, assume now you removed the clamp and allowed the gun to sit freely on the polished table. How do you expect this change would affect the flight of the ball, and what principle is most useful for making this prediction? A) The ball would go farther after this change; conservation of energy. B) The ball would go farther after this change; conservation of angular momentum. C) The ball would go farther after this change; conservation of momentum. <:::) The ball would fall shorter after this change; conservation of momentum/time! Causewa‘h‘ow 05 energy. E) The ball would travel the same distance as before; common sense. 61. Consider the collision of two identical hockey pucks on a smooth ice Nrink. Assume that by analyzing the videotape of the collision, various but not all components of the momenta of the two pucks before and after collision have been determined and are recorded in the table below. Assume that there is negligible friction with the ice, but that the pucks are soft and that considerable kinetic energy is "lost" in the collision. Under these assumptions, what is the value (if it can be determined) of the entry marked with the "x"? Before collision After collision Puck #1 ,ﬂ ,, x7 A) -o.24 B) -o.02 D) 1.60 514’ Xv {a ‘40 E) Cannot be determined rom the information given. -3- 62. If the result of a measurement of a distance is determined to be (in um) 480,026 i 300, which of the following expresses the measured value in a form consistent with standard practice in the use of significant figures? (in the same units) A) 4.8 x 105 B) 480,000 1717 ygo X /0 C) 480,300 “I p . D) 4 8 . " z§<z?zdcxa Lﬂvjqé Eggqyzg (lrﬁlar lﬁﬁ/f 4.800 x ,o 63. Consider two concentric metal, circular-shaped electrodes in an electrolytic tank as shown. If the electric potentials on the inner and outer electrodes are 0 and 10 volts, respectively, which of the following curves best represents the potential in the region from 0 to 8 cm? "5 4’75” fifz'n'“ ‘MQ inner” e.’€c:«44’0616")‘ hence) . 1.»; max”: {Id/NC” VU) 0144105.! :1 mi) Hear“ Hm inner 8'95 a E) None of the curves shown at the right is even close! Potential (measured from center of symmetry) 64. Measurements of physical quantities are often quickly repeated several times, one after the other. Which of the following is not a good reason for this practice? (::3)To determine the systematic error that may be present. B) To estimate the random uncertainty in each measurement. C) To determine the average of many measurements, because such averages typically have smaller random uncertainties than the corresponding individual measurements. D) To determine if the measurement fluctuations are consistent in size with the type of system being observed and instruments being used. E) To look for some degree of reproducibility in the measurements, a characteristic that is expected in many physical systems. as Swol/éniwoadm meager \$162.}: Lian/J4 3W6. measczemms . I . . 'HMUL 4N; 3"75%€ir-5176£tj/b7 00 Ema/é rape?!) m w‘a‘r‘i‘- “W: saw... Sea/c, ("50% mi“ mfg/P. ...
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## This note was uploaded on 03/26/2008 for the course PHYS 221 taught by Professor Herrera-siklody during the Spring '08 term at Iowa State.

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lab1989S - PHYSICS 221 - SPRING 1989 - FINAL This...

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