# Which of the following is a wrong statement a in a

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17) Which of the following is a WRONG statement? A) In a longitudinal wave, the speed of the wave and the speed of motion of material particles are different entities. B) If a long heavy cable is held vertically and is fixed at both ends, the speed of transverse waves on it should be higher at the top than at the bottom. C) The amplitude of a harmonic wave is the difference in the levels of disturbance between a crest and an adjacent trough. D) A harmonic wave and a pulse propagating on the same string should have the same wave speed, as long as the disturbances they produce are sufficiently small. 17) 18) A wave on a stretched string is described by y = 0.02 sin (32t - 16x), where the coefficients are given in SI units. What is the wave speed? 18) 19) Consider the equation Q = D U + W. Which of the following statements is WRONG? 19) A-3

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20) Which of the following statements is WRONG? 20) 21) A compression, at a constant pressure of 110 kPa, is performed on 4.0 moles of an ideal monatomic gas (C v = 3/2 R). The compression reduces the volume of the gas from 0.5 m 3 to 0.24 m 3 . The change in the internal energy of the gas, in kJ, is closest to: A) -42 B) 72 C) -72 D) 42 21) 22) Which of the following is a WRONG statement? 22) 23) Which of the following is a WRONG statement? 23) 24) A heat pump with a COP of 4.7 delivers to a house heat at a rate of 14 kW. At what rate is it doing work? 24) A-4
Answer Key Testname: FINAL AS 1) C 2) D 3) C 4) C 5) C 6) A 7) A 8) C 9) A 10) D 11) A 12) C 13) B 14) D 15) C 16) C 17) C 18) D 19) B 20) A 21) A 22) C 23) C 24) D A-5
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