PHYS 210 Final 2015, Spring 2017

6 Suppose a gas has molar specific heat C= 15 J/mole.K and C,=25 Jimole.K. [fithe temperat of § moles of the gas is increased by 10 K at constant pressure, the work done by the gas Gn Joule) is: * - Select one: © 500] © -500) ) 750 3 1250 J 2000 J If a longitudinal wave travels along a y-axis, in what direction do the particles oscillate? Select one: along x-axis along y-axis he below graph shows the potential energy of a particle moving axis. What value must the mechanical energy E,,.,, of the pare ceed if the particle is to be trapped in the potential well at the aiong Z-ax!s s left potential well | ’ right potential | re A well es aa 6 Suppose a gas has molar specific heat C= 15 J/mole.K and C,=25 Jimole.K. [fithe temperat of § moles of the gas is increased by 10 K at constant pressure, the work done by the gas Gn Joule) is: * - Select one: © 500] © -500) ) 750 3 1250 J 2000 J If a longitudinal wave travels along a y-axis, in what direction do the particles oscillate? Select one: along x-axis along y-axis he below graph shows the potential energy of a particle moving axis. What value must the mechanical energy E,,.,, of the pare ceed if the particle is to be trapped in the potential well at the aiong Z-ax!s s left potential well | ’ right potential | re A well es aa O atong 2-8 the below graph shows the potential energy of a particle moving along “{ Saxis. What value must the mechanical energy Emec Of the particle no on exceed if the particle is to be trapped in the potential well at the left? U(x) U) estion 32 Two slits separated by 0.10 mm are illuminated with green light (A= 540 — nm). Calculate the distance (in cm) from the central bright-region to the is “ss bright band if the screen is 1.0 m away. ed out of Give your answer in centimeters. Do not put the unit. g question Answer: ¢ _ n 33 An ideal gas performs 20 J of work in an isothermal expansion where its volume increases from 10 liter to 20 liter. Calculate the work done by the same gas at the same temperature when its volume increases from 10 liter t of to 31 liter. Give your answer in Joule, with two digits after the decimak. Do not stion put the unit Answer: { ; ined at @ = 40° while ~ | sestion 31 In the Figure below, a 5.0 kg block is sent sliding up a plane incl Ae a horizontal force F of magnitude 50 N acts on it. The coefficient of kinetic friction § prered between block and plane is 0.30. BAG out of What is the magnitude of the block's acceleration? x lag question 2 Take g = 9.81 m/s . Select one: 2 -2.82:m/s 2 -2.1 m/s 2 2.82 m/s 1.82 m/s 2.1 m/s” arated by 0.10 mm are illuminated with green light (A= 540 32 Two slits sep (in.cm) from the central bright-region to the 7 nm). Calculate the distance bright band if the screen Is 1.0 m away. your answer in centimeters. Do not put the unit. th slow Figure shows a cycle consisting of five paths: AB t a constant pressu ) K, BC is adiabatic with work = 3.3], cDisa ” ites Wada ae ft ~ atm, DE is isothermal, and EA is adiabatic with a change in internal energy ee » of 8.2 J. What is the change in internal energy of the gas along path CD? ' ' : estion P E B Vv Give your answer in Joules; Do not put the unit next to your answer. Hint: AE,., for a complete cycle = 0 ‘ Answer: Question 1 Not yet answered Marked out of 2.00 r Flag question Question 2 ot yet nswered arked out of 00 Flag question stion 3 jet ered 2d out of A system is taken from state j to state f with reversible processes. Then the experiment is repeated but now the system is taken between those two states through irreversible processes. How does the entropy of the system changes for the different procedures compare? Select one: © The entropy change for the reversible processes is greater than that for the irreversible processes. The entropy change for the reversible processes is less than that for the irreversible processes. The entropy changes for the two procedures are the same. Cannot tell since the two processes are different. During each cycle, a Carnot engine absorbs 709.5 J as heat from high- temperature reservoir at 360 K, with the low temperature reservoir at 280 K. How much work is done per cycle? GI e decimal. Do not F h Answer: ; '. In the Fiqure below, a glass lens is coated on one side with a thin filn lagnesium fluoride MqgF.) t duce reflection from the lens surface. The index of refractic MaF.. is 1.2 « that of the glass is 1.50. What is the least coating thickness that elimin terference) the eflections at the middle of the visible spectrur A= 550 nr at the S approximately perpendicular to the lens surface. \u Mut Chae question 8 | Calculate the change in the area (in cm *Yof 2 an almine sheet that 2 20 cm when the temperature rises from 10°C to 110°C. Thermal expansion m . coefficient of aluminum is a = 23x10 wy ut of * bd 2 2 ' 1 Z Give your answer In cm . | ot estion Answer: ? A glob of slime is launched or dropped from the edge of a cliff. Which of the graphs below could possibly show how the gravitational potential energy of the glob with respect to the ground reference point (U =0) changes during its flight? LENA A coefficient of aluminum is a = 23x10 °/kK. Z ™ 2 Give your answer incm . Answer: A glob of slime is launched or dropped from the edge of a cliff. Which of the graphs below could possibly show how the gravitational potential energy of the glob with respect to the ground reference point (U =0) changes ) U U U. ALTIBEI A ASA} L- MAY thy ’ ta) (+) {a U {dy U U U U Ne Wee i SRYOTUSEE?) bet Ait 1 {rl if) (gd (hy during its flight? Wha he power dissipated by the waterfall? | 9=9.8 m/s’. . Select one: © 588%10° Watts Oo 294X10° Watts © 147x10° Watts © 60x10° Watts © Cannot tell, need more information ncm *) of é a oglihe tt sheet that 20 cr Calculate the change in the area (i rom 10 °C to 410 C. Thermal, expans x 20 cm when the temperature rises 2 coefficient of aluminum is a = 23x10 °K. 2 Give your answer incm . Answer: