VIEWS: 946 PAGES: 11 POSTED ON: 5/14/2010
Physics: Review problems 1. What is the acceleration of a car that c. 250 m maintains a constant velocity of 50 m/s for d. 500 m 10 seconds? 9. A car accelerates at 2 m/s2. If it starts from a. 0 rest, how much time is needed to accelerate b. 5 m/s2 to a velocity of 30 m/s? c. 10 m/s2 a. 2 s d. 500 m/s2 b. 15 s 2. When an object is in free fall, its c. 30 s a. Velocity increases d. 60 s b. Acceleration increases 10. A ball is dropped from the top of the Empire c. Both of these State Building. At the same moment, a ball d. Neither of these is thrown downward from the same location. 3. When an object is in free fall, the distance it Neglecting air resistance, the acceleration is travels in each succeeding second is greater for a. Constant a. The dropped ball b. Decreasing b. The thrown ball c. Increasing c. The same for both balls d. Depends on the shape of the object 11. A ball is dropped from the top of the Empire 4. Ten seconds after release, and object in free State Building. At the same moment, a ball fall has velocity is thrown downward from the same location. a. 5 m/s Including air resistance, the acceleration is b. 10 m/s greater for c. 50 m/s a. The dropped ball d. 100 m/s b. The thrown ball 5. A car accelerates at 2 m/s2. What is the c. The same for both balls speed 3 seconds after the car starts moving? 12. Someone standing at the edge of a cliff a. 2 m/s throws one ball straight up and another ball b. 3m/s straight down with the same velocity. c. 4 m/s Neglecting air resistance, the ball that hits d. 6 m/s the ground below with the greater speed is 6. A ball is thrown upwards and caught when it a. The upward ball comes back down. In the presence of air b. The downward ball resistance, the speed when it is caught is c. Both have the same speed a. More than the initial upward speed 13. Someone standing at the edge of a cliff b. Less than the initial upward speed throws one ball straight up and another ball c. Equal to the initial upward speed straight down with the same velocity. d. Depends on if the wind is blowing. Including air resistance, the ball that hits the 7. An object falls freely on a planet where the ground below with the greater speed is acceleration due to gravity is 20 m/s2. After a. The upward ball 5 seconds, the speed is b. The downward ball a. 5 m/s c. Both have the same speed b. 20 m/s 14. A pot falls from a ledge and hits the ground c. 50 m/s 45 meters below. Neglecting air resistance, d. 100 m/s the speed with which it hits the ground is 8. An object falls freely on a planet where the a. 30 m/s acceleration due to gravity is 20 m/s2. After b. 45 m/s 5 seconds, the distance it has fallen is c. 60 m/s a. 20 m d. 120 m/s b. 100 m 1 Physics: Review problems 15. An airplane travels at a velocity of 282 m/s 22. Which moves faster (m/s) in a merry-go- towards the northeast. What is its round: a horse on the inside or a horse on component velocity due north? the outside? a. 82 m/s a. Inside horse b. 141 m/s b. Outside horse c. 200 m/s c. Prettier horse d. 282 m/s d. Both move at the same speed 16. A rock is thrown upward at an angle of 50° 23. Suppose you are on a Ferris wheel, seated to the ground. As it rises, its horizontal 10 m from the wheel’s axis of rotation. If component of velocity you make a complete rotation in 30 s, then a. Increases your linear speed is approximately b. Decreases a. 0.333 m/s c. Remains the same b. 1.047 m/s d. Decreases at first, then increases c. 2.094 m/s 17. A stone is thrown horizontally off a cliff. d. 10 m/s One second after release it vertical distance 24. Compared to a 1-kg block of iron, a 2-kg below the cliff is block of iron has twice as much a. 1 m a. Inertia b. 5 m b. Mass c. 10 m c. Volume d. 20 m d. All of these 18. A bullet is fired horizontally and hits the 25. A sheet of paper can be withdrawn from ground after 0.5 s. If another bullet was under a glass of water without spilling if the fired horizontally with a much higher initial paper is jerked quickly. This best speed, then it would hit the ground demonstrates that (neglecting air resistance) in a. The glass of water has no a. Less than 0.5 s acceleration b. 0.5 s b. There is an action-reaction pair of c. More than 0.5 s forces 19. After a rock that is thrown straight up c. Gravity tends to hold the water reaches the top of its path and is starting to secure fall back down, its acceleration is d. The glass of water has inertia a. Greater than at the top of the path 26. One object has twice the mass of another. b. Less than at the top of the path The first object also must have twice as c. The same as at the top of the path much d. Depends on how fast it was thrown a. Inertia 20. What prevents the international space station b. Velocity from falling to Earth? c. Gravitational acceleration a. Lack of gravity d. Volume b. Lack of air resistance 27. A package falls off a truck that is moving 30 c. Nothing – it’s falling all the time. m/s. Neglecting air resistance, the 21. An airplane flies at 100 m/s at an altitude of horizontal speed of the package just before it 45 m. The pilot drops a heavy package that hits the ground is falls to the ground. Where, approximately, a. Zero does the package land? b. Less than 30 m/s but more than zero a. Right beneath the plane c. 30 m/s b. 100 m beneath the plane d. More than 30 m/s c. 120 m behind the plane d. More than 120 m behind the plane. 2 Physics: Review problems 28. A hockey puck is set in motion across a c. 10 times as much force frozen pond. If air resistance and ice d. 100 times as much force friction are negligible, then the net force on 35. A jumbo jet has a mass of 100,000 kg. The the hockey puck is thrust for each of its four engines is 50,000 a. Zero N. What is the jet’s acceleration in m/s2? b. Equal to the weight of the puck a. 0.25 c. The weight of the puck divided by b. 1 the mass of the puck c. 2 d. The mass of the puck multiplied by d. 4 10 36. A skydiver of mass 100 kg experiences 500 29. You and two astronauts report finding a N of air resistance. What is her chunk of gold with weight 1 N. Who has acceleration? the most gold? a. 0.2 g a. The astronaut on the Moon b. 0.3 g b. The astronaut on Jupiter c. 0.4 g c. You, on the Earth d. 0.5 g d. All of you have the same amount of 37. A car traveling at 22 m/s comes to an abrupt gold. halt in 0.1 s when it hits a tree. The average 30. A 1-kg falling object encounters air deceleration in m/s2 is resistance of 4 N. The net force on the a. 110 object is b. 220 a. 0 N c. 800 b. 4 N d. 880 c. 6 N 38. A 10-kg block with an initial velocity of 10 d. 10 N m/s slides 2 seconds across a horizontal 31. If an object has no acceleration, then we can surface and comes to rest. The friction force say for certain that it is on the block is a. At rest a. 5 N b. Moving with constant velocity b. 10 N c. In mechanical equilibrium c. 25 N d. All of these d. 50 N 32. A car has a mass of 1000 kg and accelerates 39. A 5-kg block with an initial velocity of 10 at 2 m/s2. The net force on the car is m/s slides 10 meters across a horizontal a. 500 N surface before coming to rest. The friction b. 1000 N force on the block is c. 1500 N a. 5 N d. 2000 N b. 10 N 33. A student who weighs 60 kg stands on two c. 25 N bathroom scales so that each shows the same d. 50 N measurement. The force on each scale is 40. A 2000-kg car experiences a braking force a. 100 N of 10,000 N and skids to a stop in 6 seconds. b. 200 N The speed of the car just before the brakes c. 300 N were applied was d. 600 N a. 1.2 m/s 34. A force on a 1-kg brick accelerates it. To b. 15 m/s equally accelerate a 10-kg brick you would c. 30 m/s have to push with d. 45 m/s a. Just as much force b. One-tenth as much force 3 Physics: Review problems 41. A large person and a small person wish to 47. A Hummer and a Mini traveling at the same parachute at equal terminal velocities. The speed collide. The force of impact is greater larger person will have to on a. Get a larger parachute a. The Hummer b. Jump lightly leaving the plane b. The Mini c. Pull upward on the supporting c. Is the same for both strands to decrease the downward net d. Depends on the angle of the collision force 48. A Hummer and a Mini traveling at the same d. Jump first from the plane speed collide. The vehicle that undergoes 42. A panther and a feather fall from a tree the greater change in velocity is through the air to the ground below. The a. The Hummer force of air resistance is greater on the b. The Mini a. Panther c. Both are equal b. Feather d. Depends on the angle of the collision c. The same on both 49. Two people pull on a rope in a tug-of-war. d. Depends on the height of the fall Each pulls with a force of 400 N. The 43. A skydiver steps from a stationary helicopter tension in the rope is and falls for 5 s before reaching her terminal a. Zero velocity. During the 5-second fall her b. 200 N acceleration c. 400 N a. Is constant d. 600 N b. Increases e. 800 N c. Decreases 50. Two people are on frictionless ice, one with d. Is zero mass 40 kg and one with mass 80 kg. They 44. A 500-N parachutist opens his chute and pull hand-over-hand on a 12-meter rope and experiences an air resistance of 800 N. The meet. The heavier person has slid a distance net force on the parachutist is of a. 300 N downward a. 3 m b. 500 N downward b. 4 m c. 800 N downward c. 6 m d. 300 N upward d. 8 m 45. A ball is thrown straight up and takes 10 seconds to go up and return to the ground. Because of air resistance, the time taken for the ball to just go up to its maximum height is a. Less than 5 s b. 5 s c. More than 5 s d. Impossible to tell 46. A player hits a ball with a bat. If the action force is the force of the bat on the ball, the reaction force is a. The force of the bat on the player’s hands b. The muscular effort of the batter c. The force of the ball on the bat d. The friction of the player’s shoes on the ground 4 Physics: Review problems 51. A Hummer and a Mini are traveling on a a. 4 kg highway at the same speed. If the Hummer b. 12 kg has twice the mass of the Mini, then the c. 48 kg Hummer’s momentum is d. 192 kg a. The same as the Mini 58. A karate expert executes a swift blow and b. Half that of the Mini severs a cement block with her bare hand. c. Twice that of the Mini The magnitude is the same for the d. Four times that of the Mini a. Impulse on the block and the hand 52. It is correct to say that impulse equals b. Force on the block and the hand a. Momentum c. Time of impact on the block and the b. The change in momentum hand c. The force multiplied by a distance d. All of these d. All of these 59. A 1-kg chunk of putty moving at 1 m/s 53. A heavy truck and a light truck roll down a collides and sticks to a 5-kg block on hill. Neglecting friction, at the bottom of the frictionless ice. The block and putty then hill the heavy truck will have greater move with momentum of a. Speed a. 0 kg m/s b. Acceleration b. 1 kg m/s c. Momentum c. 5 kg m/s d. All of these d. 6 kg m/s 54. In order to catch a baseball, a player extends 60. The force that accelerates a rocket in outer his hand forward before the impact of the space is exerted on the rocket by ball and then lets it ride backward in the a. The rocket’s engines direction of the ball’s motion upon impact. b. The rocket’s wings Doing this reduces the force of impact on c. Atmospheric pressure the player’s hand principally because d. Exhaust gasses a. The velocity of impact is lessened 61. A cannonball shot from a cannon with a b. The momentum of impact is lessened long barrel will have a greater velocity c. The time of impact is increased because the cannonball receives a greater d. The time of impact is decreased a. Force 55. A bullet is fired from a gun. The speed of b. Impulse the bullet will be the same as the speed of c. Both of these the recoiling gun d. Neither of these a. Because momentum is conserved 62. A 10-kg fish swimming at a velocity of 1 b. Because velocity is conserved m/s swallows an absent-minded 2-kg fish c. Because both velocity and swimming towards it at 4 m/s. The speed of momentum are conserved the larger fish after lunch is d. Only if the mass of the bullet and a. 1/2 m/s gun are equal b. 1/5 m/s 56. The force on an apple hitting the ground c. 1/6 m/s depends on d. 2/3 m/s a. The speed of the apple just before it 63. A 1-kg chunk of putty moving at 1 m/s hits the ground collides and sticks to a 5-kg block on b. The time of impact with the ground frictionless ice. The block and putty then c. Whether or not the apple bounces move with velocity of d. All of these a. 1/2 m/s 57. A ball is moving at 4 m/s and has a b. 1/5 m/s momentum of 48 kg m/s. What is the ball’s c. 1/6 m/s mass? d. 2/3 m/s 5 Physics: Review problems 64. Suppose an astronaut in outer space wants to 70. A bow is drawn with an arrow so that it has play a solitary game of “throw, bounce, 300 J of potential energy. When the bow is catch” by tossing a ball against the wall of released the arrow will have kinetic energy the international space station. If the ball is a. Less than 300 J as massive as the astronaut, the astronaut b. 300 J a. Will catch one bounce only c. More than 300 J b. Will never catch the first bounce d. It depends on the bow c. Will see that the time between 71. No work is done on a bowling ball that rolls catches increases along a bowling alley because d. Can’t predict what will happen a. No force acts on the ball without knowing more about how b. No distance is covered by the ball the ball and ISS interact c. The force on the ball is at right 65. A golf ball moving forward with 1 unit of angles to the ball’s motion momentum strikes and bounces backward d. No potential energy is converted into off a heavy bowling ball that is initially at kinetic energy rest. The bowling ball is set into motion 72. It takes 40 J of energy to slide a heavy box 4 with momentum m across the floor. The force applied is a. Less than 1 unit a. 4 N b. Exactly 1 unit b. 10 N c. More than one unit c. 40 N d. Not enough information to decide d. 160 N 66. If you push an object twice as far while 73. A 2-kg mass has 40 J of potential energy applying the same force you do relative to the ground. How high is it? a. Half as much work a. 1 m b. The same amount of work b. 2 m c. Twice as much work c. 3 m d. Four times as much work d. 4 m 67. Lifting a heavy object to a height of 10 74. A car passes an identical car traveling four meters is done slowly, while an identical times as fast as the slower car. The kinetic object is lifted to the same height quickly. energy of the faster car is Both jobs require a. Four times as much a. The same work but different energy b. Eight times as much b. The same work but different power c. Twelve times as much c. The same work and the same power d. Sixteen times as much d. Different amount of work and power 75. A ball is thrown upward with 100 J of 68. If a student exerts 100 J of energy in 50 s, kinetic energy. Accounting for air then her power output is resistance, the kinetic energy of the ball a. 1/4 W when it is caught is b. 1/2 W a. Less than 100 J c. 2 W b. 100 J d. 4 W c. More than 100 J 69. When an object is lifted 10 meters it gains a d. Depends on the kind of ball certain amount of potential energy. If it is 76. A machine puts out 100 W of power for lifted 20 meters its potential energy gain is every 1000 W of fuel put into it. The a. Half as much efficiency of the machine is b. The same a. 5% c. Twice as much b. 10% d. Four times as much c. 90% d. 110% 6 Physics: Review problems 77. A car moving at 20 m/s skids 20 m with its a. More momentum, less kinetic energy brakes locked. How far will it skid with its b. Less momentum, less kinetic energy brakes locked if it is traveling 60 m/s? c. More momentum, more kinetic a. 20 m energy b. 60 m d. Less momentum, more kinetic c. 120 m energy d. 180 m 84. A piece of taffy slams into and sticks to an 78. Which requires most work done by the identical piece of taffy at rest. What brakes of a car? percentage of the kinetic energy is lost to a. Slowing from 75 to 60 mph heat? b. Slowing from 60 to 40 mph a. 0 % c. Slowing from 40 to 20 mph b. 25% d. Slowing from 40 to 0 mph c. 50 % 79. Two identical arrows, one with twice the d. 75% speed of the other, are fired into a hay bale. 85. A coin and a ring roll down a ramp. The The faster arrow will penetrate one to reach the bottom first is the a. The same distance as the slower a. Coin b. Twice as far as the slower b. Ring c. Four times as far as the slower c. Both reach the bottom at the same d. More than four times as far time 80. A kilowatt-hour is the amount of energy d. Not enough information needed to exert one kilowatt of power for 86. A torque acting on an object tends to one hour. This is equal to produce a. 60 J a. Equilibrium b. 3600 J b. Rotation c. 36,000 J c. Linear motion d. 3,600,000 J d. A center of gravity 81. A car’s engine is 20% efficient. When 87. On a balance see-saw, a boy three times as cruising, it encounters an average retarding heavy as his partner sits force of 1000 N. If the energy content of a. 1/6 the distance from the fulcrum gasoline is 1.6 x 108 J/gallon, the car’s b. 1/3 the distance from the fulcrum mileage will be c. 2/3 the distance from the fulcrum a. 56 km/gallon d. The same distance from the fulcrum b. 48 km/gallon 88. If you put a pipe over the end of a wrench c. 40 km/gal when trying to loosen a stubborn bolt, and d. 32 km/gal you effectively make the wrench handle 82. Two pool balls, each moving at 2 m/s twice as long, you increase the torque by collide and bounce apart. If a student a. Two reports that they are now both traveling at 4 b. Three m/s, you know this is incorrect since it c. Four would violate d. Eight a. Conservation of momentum 89. You actually weigh a little less at the b. Conservation of energy equator than you do at the North Pole. This c. Both of these is mainly due to d. Neither of these a. Spin of the earth 83. A moving golf ball collides with a bowling b. Tidal bulges ball at rest and bounces backwards. After c. Higher temperatures at the equator the collision, the bowling ball, compared to d. Influence of the moon the golf ball, has 7 Physics: Review problems 90. To turn a stubborn screw, it is best to use a b. The mounted tire if the tire is lighter screwdriver with than the rim a. A skinny handle c. The mounted tire if it is the same b. A fat handle weight as the rim c. A yellow handle d. The mounted tire regardless of its d. A wooden handle weight 91. A 1-kg rock is suspended from the tip of a 97. A satellite that is 4 times as far away from a meter stick at the 0-cm mark. If the meter planet as an identical satellite moves with stick balances with a fulcrum at the 25-cm half the velocity. Its angular momentum is mark, the mass of the meter stick is a. Half as much as the closer satellite a. 1/4 kg b. The same as the closer satellite b. 1/2 kg c. Twice as much as the closer satellite c. 3/4 kg d. Four times as much as the closer d. 1 kg satellite 92. A ball rolls down a hill mainly because of 98. A space habitat of the future is a cylinder a. Unbalanced torque rotating in space about its long axis. The b. Unbalanced force simulated gravitation field along the axis of c. Its rotational inertia the habitat is d. Angular momentum a. Zero 93. A car travels in a circle with constant speed. b. g The net force on the car is c. ¼ g a. Zero d. ½ g b. Directed forward in the direction of 99. If you change the tires on your car and travel replace them with tires of a larger diameter, c. Directed towards the center of the you will find that your speedometer will circle show a speed that is d. Directed outward from the center of a. Higher than it actually is the circle b. Lower than it actually is 94. A huge rotating cloud of particles in space c. Is correct gravitates together to form an increasingly d. Not enough information dense ball. As it shrinks, the cloud 100. To kick a football so that it doesn’t topple a. Rotates faster end over end, kick it so that the force b. Rotates slower extends c. Rotates at the same speed a. Above its center of gravity d. Depends on how fast it contracts b. Below its center of gravity 95. If the polar ice caps melted, the resulting c. Through its center of gravity water would be distributed evenly over the d. As hard as you can area of the oceans. The length of a day would slightly a. Longer b. Shorter c. Stay the same d. Not enough information 96. Which will roll down a hill faster, an empty car tire, or an identical tire mounted on a rim? a. The mounted tire if the tire is heavier than the rim 8 Physics: Review problems 101. If the mass of the Earth were somehow 108. Two objects move towards each other in increased by a certain amount with no deep space because of their gravitational change in its radius, your weight would attraction to each other. As the objects get a. Decrease by a proportional amount closer together, their acceleration b. Decrease by the square of the amount a. Increases c. Increase by a proportional amount b. Decreases d. Increase by the square of the amount c. Stays the same 102. If the radius of the Earth were somehow d. Not enough information decreased by a certain amount with no 109. The force of gravity acts on all the apples change in its mass, your weight would on an apple tree. Some apples are twice as a. Decrease by a proportional amount high as others, but they are all essentially the b. Decrease by the square of the amount same size. The twice-as-high apples have, c. Increase by a proportional amount compared to the lower apples, d. Increase by the square of the amount a. 1/4 the weight 103. Inside a free-falling elevator, there would b. 1/2 the weight be no c. Twice the weight a. Gravitational force on you d. Practically the same weight b. Apparent weight for you 110. The planet Jupiter is about 300 times as c. Both of these massive as the Earth, yet on its surface you d. Neither of these would weigh only about 3 times as much. 104. The Earth’s gravitational field extends This is because a. To the top of the atmosphere a. Your mass is 100 times less on b. Only on the outside of the Earth Jupiter c. To the edge of the solar system b. Jupiter is significantly farther from d. Throughout the entire universe the Sun 105. Planets Yin and Yang are each of mass M c. You are 10 times as far from the and separated by 1 AU. Planets Cheech and center of Jupiter Chong are each of mass 2M and separated d. You are 100 times as far from the by 2 AU. The gravitational force between center of Jupiter Cheech and Chong is 111. Half way to the center of a planet of a. The same as between Yin and Yang uniform density, your weight compared to at b. Half that between Yin and Yang the surface would be c. Twice that between Yin and Yang a. 1/4 d. 4 times that between Yin and Yang b. 1/2 106. An object is placed exactly halfway c. 3/4 between the Earth and the Moon. The d. The same object would fall toward the 112. The reason the Moon does not fall into the a. Earth Earth is because b. Moon a. The Earth’s gravitational field is c. Sun weak at the Moon d. None of these b. The gravitational pull of other 107. The gravitational force on an astronaut at planets keeps the Moon up the Earth’s surface is 500 N. In an orbiting c. The Moon has sufficient tangential spacecraft that is one Earth-radius above the velocity surface, the gravitational force on her is d. The Moon has less mass than Earth a. 500 N b. 250 N c. 125 N d. 0 N 9 Physics: Review problems 113. The Earth is presently accelerating towards 119. The fastest moving planet in a solar system the Sun (centripetal acceleration). If the sun is the collapsed into a black hole, this acceleration a. Least massive planet would b. Most massive planet a. Increase c. Planet nearest the sun b. Decrease d. Planet farthest from the sun c. Stay the same 120. It takes Pluto a lot longer to travel around d. Cease to exist the Sun than the Earth does. This is because 114. A clever student wants to make a profit by a. It has farther to go buying gold by weight at one altitude and b. It goes slower selling the same gold for the same price per c. Both of these pound at a different altitude. The student d. Neither of these should 121. A satellite in an elliptical orbit travels at a. Buy at a high altitude and sell low constant b. Buy at a low altitude and sell high a. Velocity c. Stay in school because this scheme b. Acceleration makes no sense c. Both of these 115. Tidal forces in general are the result of d. Neither of these a. Two or more sources of gravitation 122. A satellite for Dish Network hovers over a b. The inverse-square law fixed point on Earth’s equator. This can be c. Unequal fluid flow done because d. Unequal forces acting on different a. Forces other than Earth’s gravity are parts of a body acting on it 116. During an eclipse of the Sun the high ocean b. It pulls as hard on the Earth as the tides on Earth are Earth pulls on it a. Higher than average c. It is kept aloft by ground control b. Lower than average d. Its orbital period is 24 hours c. Not appreciably different than 123. From Earth, one satellite appears to average overtake another in the sky. This is due to d. Absent since the moon is blocking a. The faster satellite is higher in orbit the Sun b. The faster satellite is lower in orbit 117. The Earth is slightly closer to the sun in c. The faster satellite has greater mass January than July. In the northern d. An optical illusion hemisphere, the highest high tides are in the 124. Angular momentum is conserved for a a. Winter satellite in b. Spring a. A circular orbit c. Summer b. And elliptical orbit d. Fall c. Both of these 118. The circular orbit of a satellite is d. Neither of these characterized by constant 125. A rocket coasts in an elliptical orbit about a. Speed the Earth. Firing its engine burns fuel at a b. Acceleration constant rate and exerts a constant force. It c. Radial distance can attain escape velocity using the least d. All of these amount of fuel by firing the engine [hint: F ! d = ! KE ] a. When closest to Earth b. When farthest from Earth c. It will use the same amount of fuel anywhere in its orbit 10 Physics: Review problems Answers Problem Set #1 44. D 87. B 1. A 45. A 88. A 2. A 46. C 89. A 3. C 47. C 90. B 4. D 48. B 91. D 5. D 49. C 92. A 6. B 50. B 93. C 7. D Problem Set #2 94. A 8. C 51. C 95. A 9. B 52. B 96. D 10. C 53. C 97. C 11. A 54. C 98. A 12. C 55. D 99. B 13. B 56. D 100. C 14. A 57. B Problem Set #3 15. C 58. D 101. C 16. C 59. B 102. D 17. B 60. D 103. B 18. B 61. B 104. D 19. C 62. C 105. A 20. C 63. C 106. A 21. A 64. B 107. C 22. B 65. C 108. A 23. C 66. C 109. D 24. D 67. B 110. C 25. D 68. B 111. B 26. A 69. C 112. C 27. C 70. B 113. C 28. A 71. C 114. A 29. A 72. B 115. D 30. C 73. B 116. A 31. C 74. D 117. A 32. D 75. A 118. D 33. C 76. B 119. C 34. C 77. D 120. C 35. C 78. A 121. D 36. D 79. B 122. D 37. B 80. D 123. B 38. D 81. D 124. C 39. C 82. B 125. A 40. C 83. A 41. A 84. C 42. A 85. A 43. C 86. B 11