Announcements 0 Extra study session Saturday December 7 1 00 PM Room 1415 BPS 1 THE FINAL EXAM WILL TAKE PLACE AT 8 00 PM 10 00 PM MONDAY DEC 9 A misprint in the syllabus listed the time as 9 00 PM 2 Different sections will take the final at different locations SECTION I C102 Wilson Wilson is a large residence hall on Wilson Ave on the southwest side of campus SECTION II 138 CEM This is in the Chemistry building which is just north of the BPS building where we have lecture SECTION III N130 BCC This is in the Business Complex Center at the northwest corner of Bogue and Shaw Announcements 3 The make up exam will be given at 5 45 PM Tuesday Dec 10 in room 1415 BPS the room adjacent to where we have lecture If you need to take the make up exam please email Dr Tung or Dr Pratt and include a brief explanation as to why you are unable to take the exam at the regular time 4 The same rules which applied to the midterms will apply to the final In particular please bring your picture ID IDs will be checked carefully at the end of the exam one page of notes you can use both sides a calculator a 2 pencil Where they come from Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter Chapter 1 1 problem 2 1 problem 3 1 problem 4 2 problems 5 2 problems 6 2 problems 7 1 problem 8 1 problem 9 3 problems 10 1 problem 11 2 problems 12 2 problems 13 3 problems 14 3 problems Where they come from 9 of the problems are new meaning that they were written from scratch 3 are from the previous midterms 5 are from HW These are mostly from the last 4 problem sets 5 are from in class quizzes 2 are from in class examples 1 is from the practice exam 1 The frequency of a tuning fork is 468 Hz Find the length of the shortest open pipe which will give 6 beats s with the fork a 0 18 m b 0 36 m c 0 72 m d 0 96 m e none of the above 2 An elevator with mass m 1000 kg is going up with acceleration a 2 0 m s2 Find the tension T in the supporting cable a 5000 kg m s2 b 8000 N c 10000 kg m s2 d 11800 N e 15000 kg m s2 3 In a ballistic pendulum experiment two processes occur in suscession 1 A bullet at high initial velocity v0 is stopped in a wooden block which is suspended from the ceiling by a string and the combined system acquires a velocity of V and 2 the system executes a pendulum motion in which the velocity decreases as the pendulum rises until it reaches a maximum height and turns back Linear momentum along the direction of motion is conserved in a process 2 but not 1 b proc 1 but not 2 c both 1 and 2 d neither 1 nor 2 e none of the above 4 In the same ballistic pendulum problem as above mechanical energy kinetic plus potential energies is conserved in a process 2 but not 1 b process 1 but not 2 c both 1 and 2 d neither 1 nor 2 e none of the above 5 If you increase the power level to your speakers by 27 dB by what factor is the amplitude of the pressure wave increase a 501 b 22 4 c 14 9 d 3 86 e none of the above 6 Waves propagate at 8 m s along a stretched string The end of the string is vibrated up and down once every 2 5 s What is the wavelength of the waves that travel along the string a 10 m b 20 m c 5 0 m d 15 m e none of the above 7 Which one of the following quantities is at a maximum when an object in simple harmonic motion is at zero displacement a potential energy b frequency c acceleration d kinetic energy e force 8 One person hits the rail with a hammer while another one is some distance away with one ear on the rail Suppose that the time difference between the arrivals of the two sounds traveling through air and through steel is 3 98 s If the speed of sound in air was 340 m s how far in km are the two persons apart For steel Young s modulus is 2 0 1011 N m2 and the density is 7800 kg m3 a 1 45 km b 2 34 km c 5 68 km d 3 55 km e none of the above 9 A force of magnitude 30 N acts on a 1 2 kg block If the initial velocity of the block is 4 m s and the force acts in the direction of this velocity over what distance must this force act to change the block s velocity from 4 to 6 m s a 2 0 m b 0 2 m c 0 4 m d 4 0 m e none of the above 10 A gas is at an initial pressure of 1 5 104 Pa and occupies a volume of 0 25 m3 The slow addition of 25000 cal of heat to the system causes it to expand isobarically to a volume of 0 40 m3 What is the increase in the internal energy of the system a 2250 J b 25000 cal c 5972 J d 107 103 J e 102 103 J 11 A 0 5 kg mass oscillates in simple harmonic motion on a spring which has a spring constant of 2500 N m The spring was initially compressed 12 cm a negative displacement What is the velocity in m s when the mass is at a positive displacement of 5 cm a 3 5 m s b 5 8 m s c 7 7 m s d 15 1 m s e 22 5 m s 12 An ideal Carnot engine takes in 20 kcal of heat at 80 C and exhausts some of this at 10 C How much work in J must have been done by the engine a 4 22 105 b 100 9 c 100 900 d 2 12 104 e 2120 No right answer should be 16600 J 13 A 100 kg mass is pushed up a frictionless inclined plane How much work has to be done against gravity to move the block from the bottom to the top of a plane whose height is 5 m and which makes an angle 37 with the horizontal a 3913 J b 500 J c 4900 J d 1960 J e none of the above 14 A heat engine exhausts heat of amount Qc 3000 J while performing useful work of the amount W 1500 J What is the efficiency of the engine a 15 b 50 c 60 d 33 e 100 15 Heat …
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