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PHYS_111_Hill_m87rich_Final_Fall_2004

# PHYS_111_Hill_m87rich_Final_Fall_2004 - 55 56 5 PH'I SICS l...

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Unformatted text preview: 55. 56. 5?. PH'I' SICS l 1 1 FINAL EXAM FALL 2004 A box is lowered by a massless rope at a constant speed as shown in the ﬁgure to the right. The relationship between the weight {Wt} and force (F) is _. A. F greater than Wt E. F = Wt C. P less than Wt D. not enough information to determine. A projectile is ﬁred with an initial velocity,r of son nifs at an angle of 313° to the horizontal as shown in the ﬁgure to the right. The horizontal distance covered by the projectile is _. Hint: Neglect effects of friction. .r" a. steam .2 s. new e" V" c. 285ﬂrn ’30: .E n. 323ﬂtn E. 35401:: A box ofn'isss 51] kg is pulled by a force of 3B N as shown to the right. The coefﬁcient of kinetic friction between box and ﬂoor is ELUSU. Starting from rest the box in 2.3 seconds moves _. A. 22 m B. 33 tn C. T8 or D. 95 m E. lEﬂtn 53. A car ofmass 213131] kg is rounding a curve of radius lﬂﬂ tn. The coefﬁcient of friction (perpendicular to direction of travel} between tires and road is 01153. The maximum speed with which the car can go around the curve is __ A. 13 mfs E. lomfs C. 19mr's D. 22 mfs E. ZTnv's 59. A soldier ﬁres a 21} gram bullet from a 6 kg riﬂe. The velocityr of the bullet as it leaves the riﬂe is TDD mfs. The recoil velocity.r of the riﬂe is _. A. 1.5 nv's B. 1.7" mfs C. 1.9 mfs D. 2.1 Infs E. 2.3 mfs 6!]. A 513 kg airplane propeller is 2 m long. The average torque needed to give the propeller a speed of 21113 revis in 111 s starting ﬁom rest is _. Hint: Approximate the propeller as a thin rod. A. EGQDNam B. ESSﬂNam {3. 32DﬂN~m D. BEEN-m E. 433ﬂN-m 61. A uniform meter stick is supported by a knife edge at the 50' cm mark and has masses of {1.412} kg and one kg hanging at the 20 cm and 311 cm marks, respectively. A third mass of [1.31] kg is hung at the __ mark to balance the system. A. 15 cm H. 2B em C. 25 cm D. 31] cm E. 35 cm —"'———-—._—.__—___ 52. The length efn year on Saturn is _. A. 9.5 years 13. 13.? years C. 19.l}=e:1rs D. 29.5 years E. 39.6 years 63. An organ pipe cpen at one end is 1.5 m lcng. The lcwest scund frequency emitted by that pipe is J. A. 29H: 13. 5? Hz C. 114 H: D. 1T1 HZ E. 236 Hz 64. The upward fcrce needed to keep a ELEIZG m3 lead hrick from sinking tn the bertcrn cf Lake Scmrnerville is _. A. lSGUN El. ZUDUN C. 2230 N D. 24ﬁﬂl~l E. 2ch N 65. A baseball is threw 1with spin as shewn in the figure tn the right. Neglecting the effects cfgrnvitj,r the ball will _. gEEM Fitch A ﬁne“; LEFT if: A. gestraight __{ . H 0" B. ' . D. curve tn the right E. curve to the left 66. 6T. 63. 69. A balloon for a Christmas party is ﬁlled with helium gas at room temperature {26” C}. If the volume of the balloon is 3666 cm3, the number of moles of helium gas in the balloon is__ Hint: Helium is an ideal gas and the room is at atmospheric pressure. A. 6.69] moles B. 6.12 moles C. 6.52 moles D. 1.63 moles E. 1.32 moles In a lecture demonstration a series of ﬁve different metals were heated to 166° C and quickly placed on a bed of thin wax. it was observed that _. A. all of the metals melted completer through the wax B. none of the metals melted completer through the wax C. some metals melted through due to their high specific heats D. some metals melted through due to their low speciﬁc heats E. some metals melted through due to their high heat conductivities 26 grams of steam at 166° C is added to a 566 gram Al calorimeter cup containing 266 grams of water at 26" C. Assume no exchange of heat with the surroundings. The ﬁnal temperature of the mixture is _. Hint: The final temperature is less than 166° C. This problem is long. A. 3?“ C B. 42” C C. 46" C D. 53°C E. 65“ C It is found that to completely melt a T66 gram metal at it‘s melting point requires 14316 calories. The metal is _. A. Iron B. Lead C. Silver D. Tungsten 'i’ﬂ. A block of aluminum separates a container of ice water and a container of boiling ethyl alcohol as shown to the right. The total heat transferred in one minute is Hint: Assume no change in temperature of water and alcohol in one minute. a. 2.9x1oﬁr a. 3.53:1[1'51 c. assist-J o. some-"J E. 9.3xIG‘5J T1. The process whereby heat flows in the absence of any medium is referred to as A. conduction B. convection C. radiation D. inversion T2. The modern picture of the proton is that is composed of __ and is held together by the _ force. The positron is the positively charged antiparticle of the electron. .t-‘t. quarks and gluons. strong B. quarks and gluons, electromagnetic C. positrons and photons. strong D. positrons and photons. electromagnetic E. The proton like the electron has no knovm internal structure. 7’3. The goals of the Relativistic Heavy Ion Collide: research program are . Create the highest temperatures ever made in the laboratory. 2. Create a plasma of quarks and gluons. 3. Create a plasma ofpositrons and photons. 4. Accelerate electrons to the highest energies every attained. 5. Create the highest magnet ﬁelds every attained. A. land2 E. land3 C. 2and4 D.3a.nd4 E. 4and5 ————_—__—_—__—_ T4. A system consists of 3.1] kg of water at SE!" C. St] J of work is done on the system by stirring with a paddle wheel. while 66 J of heat are removed. The change in the internal energy of the water is _. A. t} J B. 36 J C. '36 J D. 945 J E. 36 J “F5. The ﬁrst law of thermodynamics states that and the second law ofthcrmodynamics states that _. 1. energy is conserved in a thermodysiamic process. 2. heat ﬂows from a high to a low temperature. 3. in natural processes the total entropy increases. 4. in natural processes the total entropy decreases. S. in a closed system the intents! energy increases. A. 1, 2 or 3 B. 2, 3 C. I, 2 or 4 D. 2, 5 E. 1, 4 T6. A steam engine operating at 3C! ‘Vu of it's ideal efﬁciency receives 20% J of heat at Sﬂﬂ" C and exhausts steam at 12'0" The amount of work done is _. A. 2911).} B. 4312M C. EQUJ D. 3512)] E. lﬂﬁﬂl TI. A refrigerator is used to make ice cubes at 0° C. It exhausts to the kitchen at 20° C. If the refrigerator is operating at its ideal value, _ of heat will be formatted for an input of lﬂﬂ J of work. A. SSDJ B. TED J C. 96!] J D. llBIJJ E. lBﬁﬂJ T3. On a day when the temperature is 31]” C a Eﬂﬁﬂ kg car initially,r at rest on the top of a hill rolls to the bottom and then comes to a stop. The hill is 2D in high. The change in the entropy of the universe is . Hint: Assume the above occurs at a constant temperature. A. TDD JJK B. 9H0 JJK C. llﬂﬂ JJK 13. lane HR E. 153D JJK ...
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PHYS_111_Hill_m87rich_Final_Fall_2004 - 55 56 5 PH'I SICS l...

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