Exam_5_Phys_M10A

Physics M10A, Exam #5, Ch. 11-12 & Ch. 16-17 Directions: There are 20 multiple choice questions. Each question is 5 points, and the exam is 100 points. The exam is open book, open notes. However, you may not discuss the exam with your classmates. Submit your work for each question in Canvas. ? = ? 𝑉 , ? = ?? , ? = ? 𝐴 , 𝐹 = ?? , ? = ? 0 + ??ℎ , ? ????? = ? − ? 0 , ? 0 = 1.0 ??? = 1.0 × 10 5 ??, ? = 9.8 ?/??? 2 , ? 1 𝐴 1 = ? 2 𝐴 2 , 𝐹 ? = ? ? ?? ??? , ? = ?? , ? = 𝑉 ? , ? 1 ? 1 = ? 2 ? 2 , ? 1 + 1 2 ?(? 1 ) 2 + ??ℎ 1 = ? 2 + 1 2 ?(? 2 ) 2 + ??ℎ 2 , 𝐹 ?𝑖????? = 𝜂?𝐴 𝐿 , ? = (𝑃 2 −𝑃 1 )?? 4 8𝜂𝐿 , ? 𝑅 = 2??? 𝜂 , ? = ?? 2 , ???𝑖??? 𝐹??? 𝑖? ? 𝑅 < 2000, ????????? 𝐹??? 𝑖? ? 𝑅 > 3000 , 𝐹 ? = ?? , ? = 1 𝑇 , ? = 2?√ ? 𝑘 , ? = 1 2? √ 𝑘 ? , ? ??𝑥 = ? √ 𝑘 ? , ? = 2?√ 𝐿 ? , ? = 9.8 ?/??? 2 , ? = 𝜆? , ? = 𝑃 𝐴 ? = 𝜆 , ? = 𝑃 𝐴 , ? = ? ? , 𝛽 = (10 ??) log 10 ( 𝐼 𝐼 0 ) , ? 0 = 1.0 × 10 −12 ?/? 2 , ? = ?? 2 , ?????? ???????ℎ𝑖?? ???????? ?? ???? , ? ??? = ? ? ( ? ??𝑢?? ? ??𝑢?? −? ??𝑢??? ) , ?????? ???𝑖?? ???? ???? ???????? ?? ???? , ? ??? = ? ? ( ? ??𝑢?? ? ??𝑢?? +? ??𝑢??? ) , ???? − ????: ? ? = ?? 2𝐿 , ? = 1, 2, 3, … , ???? − ??????: ? ? = ?? 4𝐿 , ? = 1, 3, 5, … Problem 1: The density of gold is 19.3 g/cm 3 . What is the mass of a solid gold rectangular bar that has dimensions of 1.3 cm × 1.5 cm × 1.7 cm? a. 24.0 g b. 44.0 g c. 64.0 g d. 84.0 g Problems 2-3 refer to the following situation. A lake has a depth of 27.5 m. The lake is filled with water, with has a density of 1000 kg/m 3 . Since the top of the lake is open to the air, the pressure at the top of the lake is the atmospheric pressure, ? 0 = 1.0 × 10 5 . Problem 2: What is the pressure at the bottom of the lake? a. 1.7 × 10 5 ?? b. 3.7 × 10 5 ?? c. 5.7 × 10 5 ?? d. 7.7 × 10 5 ?? Problem 3: An underwater vehicle is at the bottom of the lake. The vehicle has a circular window of radius 0.175 m. What is the force on this window, due to the water? a. 1.6 × 10 4 ? b. 3.6 × 10 4 ? c. 5.6 × 10 4 ? d. 7.6 × 10 4 ?

Problems 4-5 refer to the following situation. A rope is attached to the top of a block. If the block hangs in the air, the tension on the rope is 300 N. When the block is fully submerged in a fluid of density 600 kg/m 3 , the tension on the rope is 200 N. Problem 4: What is the volume of the block? a. 0.0170 m 3 b. 0.0370 m 3 c. 0.0570 m 3 d. 0.0770 m 3 Problem 5: What is the density of the block? a. 1800.7 kg/m 3 b. 3800.7 kg/m 3 c. 5800.7 kg/m 3 d. 7800.7 kg/m 3 Problems 6-8 refer to the following situation. Water flowing through a garden hose of radius 0.0137 m fills a 25.0 L bucket in 90.0 sec. Problem 6: What is the volume flow rate of the water through the hose in m 3 /sec? 1 L = 0.001 m 3 . a. 2.78 × 10 −4 ? 3 ??? b. 4.78 × 10 −4 ? 3 ??? c. 6.78 × 10 −4 ? 3 ??? d. 8.78 × 10 −4 ? 3 ??? Problem 7: What is the speed of the water leaving the end of the hose? a. 0.27 m/sec b. 0.47 m/sec c. 0.67 m/sec d. 0.87 m/sec Problem 8: What is the speed of the water leaving the end of the hose if a nozzle of radius 0.0101 m is attached to the end of the hose? a. 0.27 m/sec b. 0.47 m/sec c. 0.67 m/sec d. 0.87 m/sec Problems 9-10 refer to the following situation. Blood flows with a speed 0.40 m/sec in an aorta of radius 0.00800 m. The viscosity of the blood is 2.084 × 10 −3 ?? ⋅ ??? and the density of blood is 1025 ??/? 3 . . Problem 9: What is the Reynold’s number of the blood flow though the aorta ? a. 1147.8 b. 3147.8 c. 5147.8 d. 7147.8 Problem 10: What is the blood flow through the aorta Laminar, or Turbulent? a. Laminar b. Turbulent

Problems 17-18 refer to the following situation. A train is travelling at a constant speed of 40.0 m/sec. The train horn is sounded at its characteristic frequency of 320 Hz. The speed of sound is 340 m/sec. Problem 17: What is the frequency observers hear for the train horn when the train is approaching them? a. 322.7 Hz b. 342.7 Hz c. 362.7 Hz d. 382.7 Hz Problem 18: What is the frequency observers hear for the train horn when the train is moving away from them? a. 226.3 Hz b. 246.3 Hz c. 266.3 Hz d. 286.3 Hz Problem 19: The human ear canal is about 0.028 m long. If it is regarded as a tube that is open at one end and closed at the eardrum, what is the fundamental frequency (n = 1) around which we would expect hearing to be most sensitive? The speed of sound is 340 m/sec. a. 1035.7 Hz b. 3035.7 Hz c. 5035.7 Hz d. 7035.7 Hz Problem 20: A pipe open at both ends has a fundamental frequency (n = 1) of 300 Hz. The speed of sound is 330 m/sec. What is the length of the pipe? a. 0.15 m b. 0.35 m c. 0.55 m d. 0.75 m