PHYS 210 Final, Spring 2009

Started on | Thursday, 4 June 2009, 03:04 PM Completed on | Thursday, 4 June 2009, 05:03 PM Time taken | 1 hour 59 mins Grade | 75 out of a maximum of 103 (73%) Page: 123 4 5 6 (Next) Show all questions on one page A pressurized cylindrical tank, 5.0 m in diameter, contains water that emerges from the pipe at point C, with a Mates velocity of 50 m/s. Point A is 10 m above point B and point C is 3 m above point B. The area of the pipe at point B is 0.07 m?, and the pipe narrows to an area of 0.04 m? at point C. Assume the water is an ideal fluid in laminar flow. The mass flow rate in the pipe is closest to: Choose one answer. » 1800 Kg/s x 2000 Kg/s y @ c. 1600 Kg/s_ x d. 1200 Kg/s x 1400 Kg/s x a © Incorrect Marks for this submission: 0/4. Marks: 4 Two slits separated by 0.050 mm are illuminated with light of 1= 54 nm. How many bands of bright lines are there between the central maximum and the 12-cm position, if the distance between the double slits and the screen is 1.0 m? Choose one answer. ai1x b.11 x CV & @ ditty e.11111 x Correct Marks for this submission: 4/4 . The potential energy of particle of mass 20 g is shown in the figure below as a function of position, U=U(x). The Mans: particle is released from rest at x=1.0 m. The maximum speed that can be achieved by the particle is closest to: ~ ; S- Yb \3 | > 4 4 | is 4 x CM) Choose one answer. a. 20m/s x b. 15.81 m/s x c.0.547 mis x © d 8.66 m/s x e.17.32m/s ¥ Incorrect Marks for this submission: 0/4. 4 Which of the following is a solution to the wave equation: Marks: 4 (1) (e* sin x )/x (2) cos(kx) sin(2t) (3) e* sin(4t) (4) e* cos (4t) Choose one answer. a.none is a solution x b.(1) x c. (1) and (3) only x d. (4) x e. (3) x ® fv Correct Marks for this submission: 4/4 5 A Carnot engine operates between two heat reservoirs. It takes 120 J at the higher temperature and exhausts 80 Mate: 4 J at the lowest temperature. A second Carnot engine , operates between the same reservoirs, takes 480 J at the higher temperature. How much work is done by the second engine? Choose one answer. © a. 160) ¥ b. 2405 x c.400J x d.440J x e.40J x Correct Marks for this submission: 4/4. Marks: 4 Two speakers are driven by the same oscillator frequency f=200 Hz. They are located vertically at a distance d=4.0 m from each other. An observer walks straight toward the lower speaker as shown in the Figure. The speed of sound is v=330 m/s . The distance x from the speaker at which the observer will register the first minimum is closest to : Choose one answer. a.10.95m x b.219m x c.186m x d 928m y¥ © e464m x Incorrect Marks for this submission: 0/4. T A stone of mass 7.0 Kg is subject to a variable one-dimensional force given by: Cle: F(x)=6.0 N — (2.0 N/m) x + (6 Nim2 ) x2 The rock starts from rest at the origin (x=0). What is the speed after the block has moved a distance of 9.0 m?. (no friction is considered). (Your answer is in m/s and 2 figures after the point, like 20.31, no units with the answer) Answer: 20.22 Correct Marks for this submission: 4/4 8 An organ pipe open at both ends has a radius of 4.0 cm and a length of 6.0 m. What is the frequency of the third bia harmonics assuming the speed of sound to be 344 m/s? Choose one answer. @ a. 86Hz ¥ b.172Hz x c. 264Hz x d.440Hz x e. 140 Hz x Correct Marks for this submission: 4/4 A block of mass m is moving along a horizontal frictionless surface with a speed of 5.70 m/s. If the slope is 11° and the coefficient of kinetic friction is between the block and the incline is m,=0.26. How large is the distance traveled by the block along the incline?. You are advised to apply energy conservation. Marks: 4 Vo =5.7 m/s Choose one answer. a.372m ¥ b.6.49m x c.3.24m x © d.7.44m x e.186m x Incorrect Marks for this submission: 0/4. 10 Mere Light of wavelength 519 nm (nm=nanometer=1 0-9 m) passes through two slits. In the interference pattern observed on the screen, which is located 8.1 m away, adjacent fringes are separated by 3.9mm. What is the separation of the two slits?. Small angle approximation is valid. ( Your answer should be in mm without inserting units and 2 digits after the point) Answer: 1.08 Correct Marks for this submission: 4/4. u What is the angle for the third-order maximum for light of wavelength 500 nm when it passes through a Mates diffraction grating having 8000 lines/cm ?. The number listed below are in degrees. Choose one answer. a. does not exist ¥ b. 23.6 x © c.6.9 x d. 53.1 x e. 36.9 x Incorrect Marks for this submission: 0/4. 12 The fundamental frequency for a standing wave on a rope of length L=0.85 m, as shown in the Figure below, is 16 Hz. If the rope Marks: 4 has a linear mass density of 0.18 Kg/m. The mass M of the hanging block is closest to? (Your answer in Kg, without inserting units and 2 figures after the point, like 6.32 or 12.21) L M Answer: 13.59 Correct Marks for this submission: 4/4. 13 Marks: 4 Find the change in entropy (in J/K) when 5.00 moles of an ideal gas undergo a free expansion from an initial volume of 20 cm3 toa final volume of 100 cm3. Choose one answer. Correct Marks for this submission: 4/4. a.52 x b.67 y c.208 x d.71 x e191 x