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Q2-1) When the bullet fired into the spiral tubes emerges, which path will it follow? 1) path A 2) path B 3) path C Q2-2) Rank the following situations (A, B, and C) according to the net force, greatest first. 1) B, C, A 2) C, A, B 3) C, B, A 4) A, C, B 5N 10 N 10 N 10 N 10 N A B C 10 N 5N 20 N Q2-3) The sketch below shows a painting staging in mechanical equilibrium. The staging weighs 300 N and supports two painters, one 250 N and the other 300 N. The reading on the left scale is 400 N. What is the reading on the right scale? 1) 250 N 2) 300 N 3) 350 N 4) 400 N 5) 450 N Q3-1) The book on the table is at rest. 1) true 2) false 3) maybe Q3-2) In how many of the following cases is the car’s speed increasing? (a) A car covers longer and longer distances in equal times. (b) A car takes longer and longer to cover equal distances. (c) A car covers equal distances in shorter and shorter times. (d) A car covers shorter and shorter distances in equal times. 1) 1 2) 2 3) 3 4) 4 5) none of them Q3-3) How many different controls in a car are usually used to produce acceleration? (Ignore the clutch) 1) 1 2) 2 3) 3 4) 4 5) 5 Q3-4) Can an object be moving when its acceleration is zero? 1) yes 2) no Q3-5) A ball is thrown upwards in the absence of air resistance. The acceleration of the ball at the top of the path (where its speed is zero) is 1) zero 2) between zero and 10 m/s2 3) 10 m/s2 4) greater than 10 m/s2 Q3-6) If you drop an object, it will accelerate downward at a rate of 10 m/s2. If you instead throw it downwards, its acceleration after leaving your hand (in the absence of air resistance) will be 1) less than 10 m/s2 2) 10 m/s2 3) greater than 10 m/s2 Q3-7) For a freely falling object, how many of the following statements are true? (a) the distance fallen during each second keeps increasing; (b) the speed keeps increasing; (c) the change in speed during each second keeps increasing; (d) the acceleration keeps increasing. 1) 1 2) 2 3) 3 4) 4 5) none Q4-1) A car starts up from rest along a straight highway with an acceleration of 1 m/s2. A second car comes racing past at a steady 120 km/hr. Which car has the larger net force acting on it? 1) the first car 2) the second car 3) neither, they both have no net force on them Q4-2) An object moves with unchanging velocity so its acceleration is zero. Does it then have no forces acting on it? 1) yes, definitely 2) no, not necessarily Q4-3) A book is accelerated downward while it is in the palm of your hand. Which is larger, the book’s weight or the upward force exerted by your hand? 1) the weight of the book 2) your upward force on the book 3) neither, they are equal Q4-4) An object weighs 30 N on Earth. A second object weighs 30 N on the moon. Which has the greater mass? 1) the one on the Earth 2) the one on the moon 3) they have the same mass 4) not enough information to say Q4-5) A 10-kg brick and a 1-kg brick are both dropped in a vacuum. The force of gravity on the 10-kg brick is 1) the same as the force on the 1-kg book 2) 10 times as much as the force on the 1-kg book 3) zero Q4-6) A skydiver steps from a helicopter and falls for 5 seconds before reaching her terminal velocity. During this 5 second interval, her acceleration 1) is zero 2) is constant 3) increases 4) decreases 5) none of these Q5-1) Your hands push on a heavy box to slide it across the floor. The other member of the action/reaction pair is 1) friction pushing backward on the floor 2) gravity pulling downward on the box 3) the box pushing downward against the floor 4) the box pushing backward against your hands Q5-2) The attraction of a person’s body towards the Earth is called weight. The reaction to this force is 1) the person’s body pushing against the Earth’s surface 2) the Earth’s surface pushing against the person’s body 3) the person’s body pulling on the Earth 4) none of these Q5-3) A book at rest on the table has two forces on it: gravity pulling it down and the support force pushing it up. Are these forces an action/reaction pair? 1) yes 2) no Q5-4) A car traveling at 100 km/hr strikes an unfortunate bug and splatters it. The force of impact is 1) greater on the bug 2) greater on the car 3) the same for both Q7-1) No work is done by gravity on a bowling ball that rolls along a bowling alley because 1) no force acts on the ball 2) no distance is covered by the ball 3) the force on the ball is perpendicular to the ball’s motion 4) all of the above 5) none of the above Q7-2) Which requires more work: lifting a 50 kg sack vertically 2 meters or lifting a 25 kg sack vertically 4 meters? 1) lifting the 50 kg sack 2) lifting the 25 kg sack 3) both require the same amount of work Q7-3) If an object is moving, it has energy. We call energy of motion 1) potential energy 2) kinetic energy 3) nuclear energy 4) chemical energy 5) none of the above Q7-4) If a bowling ball and a golf ball both move with the same kinetic energy, can you say which has the greater speed? 1) no, you can not say which has the greater speed 2) yes, the golf ball has the greater speed 3) yes, the bowling ball has the greater speed Q7-5) How much kinetic energy does a car have when it moves at 100 km/hr, as compared with when it moves at 50 km/hr? 1) the same amount of KE 2) 2 times as much KE 3) 4 times as much KE 4) 16 times as much KE Q7-6) A ball is thrown straight upwards. What kind of energy does it have at the highest point? 1) only kinetic energy 2) only potential energy 3) both kinetic and potential energy Q7-7) At position A, is the marble’s kinetic energy less than, greater than, or the same as its kinetic energy when it is at position B? 1) less than 2) greater than 3) the same 4) not enough information Q7-8) Neglecting air resistance, does the total energy of a falling rock increase, decrease, or remain the same? 1) increase 2) decrease 3) remain the same Q7-9) How high do you have to release the ball for it to make a complete loop-to-loop? 1) as high as the top of the loop 2) higher than the top of the loop Q11-1) Which are older, the atoms in the body of an elderly person or the atoms in the body of a baby? 1) the atoms in an elderly person 2) the atoms in a baby 3) neither, they are the same age Q11-2) Can two different elements contain the same number of protons? 1) yes 2) no 3) not enough information Q11-3) How many protons and neutrons are in U-235? 1) 235 protons, 235 neutrons 2) 143 protons, 92 neutrons 3) 92 protons, 235 neutrons 4) 92 protons, 143 neutrons 5) none of the above Q11-4) If two protons are removed from an oxygen nucleus, the result is 1) nitrogen 2) carbon 3) helium 4) neon 5) none of the above Q11-5) If two neutrons are added to an oxygen nucleus, the result is 1) nitrogen 2) carbon 3) helium 4) neon 5) none of the above Q11-6) How many elements are in NH3? How many atoms? 1) 2 elements, 2 atoms 2) 2 elements, 4 atoms 3) 4 elements, 2 atoms 4) 4 elements, 4 atoms Q14-1) Two identical blocks (A and B) of the same mass are at rest on a surface as shown below. Which block exerts the greater pressure on the surface? 1) block A 2) block B 3) they both exert the same pressure B A Q14-2) Is the gas pressure inside a balloon greater than, less than, or the same as the air pressure outside the balloon? 1) greater than 2) less than 3) the same as Q14-3) What will happen to the mercury level in the barometer if atmospheric pressure is lowered by removing some of the air? 1) the mercury level will stay the same 2) the mercury level will rise 3) the mercury level will drop Q14-4) Will it be slightly more difficult to drink soda through a straw at sea level or on top of a very high mountain? 1) at sea level 2) on top of a very high mountain 3) it will be the same Q14-5) It would be easier to pull evacuated Magdeburg hemispheres apart when they are 1) held upside down 2) at sea level 3) 20 km below sea level 4) 20 km above sea level 5) none of these QR-1) A truck is moving at a constant velocity. Inside the storage compartment, a rock is dropped from the midpoint of the ceiling and strikes the floor below. The rock hits the floor 1) exactly below the midpoint of the ceiling 2) ahead of the midpoint of the ceiling 3) behind the midpoint of the ceiling 4) more information is needed to solve this problem 5) none of the above QR-2) While a car travels around a circular track at constant speed its 1) acceleration is zero 2) velocity is zero 3) both of these 4) none of these QR-3) If an object falls with constant acceleration, the velocity of the object must 1) be constant also 2) continuously change by the same amount each second 3) continuously change by varying amounts depending on its speed 4) continuously decrease 5) none of these QR-4) The force of friction on a sliding object is 10 newtons. The applied force needed to maintain a constant velocity is 1) zero 2) between zero and 10 N 3) 10 N 4) more than 10 N 5) none of the above QR-5) If we do not ignore air resistance, when an object falls through the air, its velocity increases and its acceleration 1) increases 2) decreases 3) stays the same QR-6) A skydiver falls towards the Earth. The attraction of the Earth on the diver pulls the diver down. What is the reaction to this force? 1) air resistance the diver encounters while falling 2) the attraction to the planets, stars, and every particle in the universe 3) there is no reaction to this force 4) none of these QR-7) A ball is projected into the air with 100 J of kinetic energy which is transformed to gravitational potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is 1) less than 100 J 2) more than 100 J 3) 100 J 4) not enough information given QR-8) One car is driving 50 mi/hr and another car of the same mass is driving 100 mi/hr. Both cars slam on the brakes and skid to a halt. If the force of friction is the same for both cars, how much farther will the faster car skid? 1) they will skid the same distance 2) twice as far 3) four times as far 4) sixteen times as far 5) none of the above QR-9) Which of the following statements is true? 1) An atom is the smallest particle known to exist. 2) There are only about 100 different kinds of atoms that combine to form all substances. 3) There are thousands of different kinds of atoms that account for a wide variety of substances. 4) All carbon atoms contain the same number of neutrons. 5) None of the above QR-10) Which of the following are electrically neutral? 1) proton 2) neutron 3) electron 4) all of these 5) none of the above QR-11) A suction cup sticks to a wall. It is 1) pulled to the wall by the vacuum 2) pushed to the wall by the atmosphere 3) both of these 4) none of the above QR-12) On a windy day, atmospheric pressure 1) increases 2) decreases 3) remains unchanged Q22-1) Each of three objects has a net charge. Objects A and B attract one another. Objects B and C also attract one another, but objects A and C repel one another. Which one of the following table entries is a possible combination of the signs of the charges on these three objects? 1) 2) 3) 4) 5) A + + - B + + + - C + + Q22-2) Strictly speaking, will a penny be slightly more massive if it has a negative charge or a positive charge? 1) negative charge 2) positive charge 3) it has the same mass either way Q22-3) You comb your hair and the comb becomes negatively charged. Strictly speaking, how will the mass of your hair change? 1) it will increase 2) it will decrease 3) it will not change Q22-4) Particle A and particle B interact with each other. Particle A has twice the charge of particle B. Compared to the force on particle A, the force on particle B is 1) four times as much 2) twice as much 3) the same 4) half as much 5) one-fourth as much Q22-5) Two charged particles repel each other with a force F. If the charge of one of the particles is doubled and the distance between them is also doubled, then the force will be 1) F 2) 2 F 3) F / 2 4) F / 4 5) none of the above Q22-6) Two charged particles held close to each other are released. As they move, the force on each particle increases. Therefore, the particles have 1) the same sign 2) opposite signs 3) not enough information given Q22-7) Complete the following statement: When a plastic rod is rubbed with animal fur, the rod becomes negatively charged as 1) protons are transferred from the fur to the rod. 2) electrons are transferred from the rod to the fur. 3) electrons are created on the surface of the rod. 4) electrons are transferred from the fur to the rod. 5) protons are transferred from the rod to the fur. Q22-8) A thin stream of water bends toward a negatively charged rod. When a positively charged rod is placed near the stream, it will bend in the 1) opposite direction 2) same direction 3) it will not bend at all Q22-9) (a) A charged rod is brought near a suspended object, which is attracted by the rod. Can we conclude that the suspended object is charged? (b) What if the suspended object is repelled by the rod? 1) 2) 3) 4) (a) yes (a) yes (a) no (a) no (b) yes (b) no (b) no (b) yes Q22-10) Which one of the following statements is true concerning the excess charge on a conductor? 1) It is evenly distributed throughout the entire conductor. 2) It is distributed throughout the entire conductor and it is distributed according to the object’s shape. 3) It is only on the surface of the conductor and is evenly distributed. 4) It is only on the surface of the conductor and it is distributed according to the shape of the conductor. Q23-1) Will the current in an ordinary light bulb be greater immediately after it is turned on or a few minutes later? 1) immediately after it is turned on 2) a few minutes later 3) the current will be the same Q23-2) What is the effect on the current in a wire if the voltage across the wire is doubled and the resistance is cut in half? 1) the current decreases by a factor of four 2) the current decreases by a factor of two 3) the current stays the same 4) the current increases by a factor of two 5) the current increases by a factor of four Q23-3) The voltage across the ends of a wire is doubled. Which one of the following statements concerning the resistance of the wire is true? 1) The resistance is decreases by a factor of four. 2) The resistance is decreases by a factor of two. 3) The resistance is not changed. 4) The resistance increases by a factor of two. 5) The resistance increases by a factor of four. Q23-4) In which of the circuits below does a current exist to light the bulb? 1) 1 2) 2 3) 3 4) 4 5) 5 Q23-5) Modern automobile headlights are connected in 1) series 2) parallel 3) perpendicular 4) none of these Q23-6) Two lamps, one with a thick filament and one with a thin filament, are connected in series. The current is greater in the lamp with the 1) thick filament 2) thin filament 3) the current is the same in each lamp Q24-1) The geographic north pole of the earth is magnetically a 1) north pole 2) south pole Q24-2) If you place a chunk of iron near the south pole of a magnet, attraction will occur. Will attraction also occur if you place the iron near the north pole of a magnet? 1) yes 2) no Q24-3) Several paper clips dangle from the north pole of a magnet. The induced pole in the bottom of the lowermost paper clip is a 1) north pole 2) south pole 3) north or south pole – no difference really Q24-4) Compared to the huge force that attracts an iron tack to a strong magnet, the force that the tack exerts on the magnet is 1) relatively weak 2) equally huge 3) more information is needed Q24-5) (a) Can an electron at rest in a magnetic field be set into motion by the magnetic field? (b) Can an electron at rest in an electric field be set into motion by the electric field? 1) (a) yes 2) (a) yes 3) (a) no 4) (a) no (b) yes (b) no (b) no (b) yes Q19-1) Which of the following are transverse waves: (a) An ocean wave rolling toward Santa Cruz beach, (b) The sound of one whale calling another whale under water; (c) A pulse sent down a stretched rope by snapping one end of it. 1) a 2) b 3) c 4) a and c 5) a, b, and c Q19-2) If the waves are going at the same speed, which wave has the greatest period of oscillation? 1) I 2) II 3) III 4) IV Q19-3) You dip your fingers repeatedly into water and make waves. If you dip your finger more frequently, the wavelength of the waves 1) increases 2) decreases 3) stays the same Q19-4) In the standing wave shown, what is its amplitude? 1) 40 centimeters 2) 20 centimeters 3) 10 centimeters Q19-5) In the standing wave shown, how many nodes are there? 1) 3 2) 4 3) 5 4) 6 Q19-6) The Doppler effect also occurs when the source of sound is stationary and the listener is in motion. In which direction should the listener move to hear a higher frequency? 1) toward the sound source 2) away from the sound source Q20-1) The speed of a sound wave in air depends upon 1) its frequency 2) its wavelength 3) the air temperature 4) all of these 5) none of these Q20-2) If the frequency of sound is doubled, what change will occur in (a) its speed? (b) In its wavelength? 1) (a) double 2) (a) double 3) (a) remain the same 4) (a) remain the same 5) (a) cut in half (b) double (b) cut in half (b) double (b) cut in half (b) remain the same Q20-3) Beats are produced when two tuning forks, one of frequency 240 hertz and another of frequency 246 hertz are sounded together. The frequency of the beats is 1) 3 hertz 2) 6 hertz 3) 12 hertz 4) 240 hertz 5) 246 hertz Q20-4) A 1056-hertz tuning fork is sounded at the same time a piano note is struck. You hear three beats per second. What is the frequency of the piano string? 1) 1053 hertz 2) 1056 hertz 3) 1059 hertz 4) 2112 hertz 5) not enough information given Q26-1) When we look at the sun, we are seeing it as it was 8 minutes ago. So we can only see the sun “in the past.” When you look at the back of your own hand, do you see it “now” or “in the past”? 1) now 2) in the past Q26-2) The main difference between a radio wave and a light wave is its 1) speed 2) wavelength 3) frequency 4) all of these 5) two of these Q26-3) Is it correct to say that in every case, without exception, any radio wave travels faster than any sound wave? 1) yes 2) no Q26-4) Consider light that is momentarily absorbed in glass and then re-emitted. Compared to the absorbed light, the frequency of the re-emitted light is 1) considerably less 2) slightly less 3) the same 4) slightly more 5) considerably more Q26-5) What astronomical event would be seen by observers on the moon at the same time the Earth was seeing a lunar eclipse? 1) a partial lunar eclipse 2) a total lunar eclipse 3) a solar eclipse 4) none of the above Q26-6) Things seen by moonlight aren’t colored because moonlight 1) doesn’t have many colors in it 2) is too dim to activate the retina’s cones 3) is too dim to activate the retina’s rods 4) all of these 5) none of these QR-1) When a light switch is turned on in a DC circuit, the average speed of electrons in the lamp is 1) the speed of sound waves in metal 2) the speed of light 3) 1000 cm/s 4) less than 1 cm/s 5) none of the above QR-2) Which of the following electromagnetic waves has the shortest wavelength 1) radio waves 2) infrared waves 3) X-rays 4) ultraviolet waves 5) light waves QR-3) When you tune a radio to a certain radio station, you match the frequency of the internal electrical circuit to the frequency of the wanted radio station. In doing so you are employing the principle of 1) interference 2) resonance 3) beats 4) reverberation 5) none of the above QR-4) To say that an object is electrically polarized is to say 1) it is electrically charged 2) its charges have been rearranged 3) its internal electric field is zero 4) it is only partially conducting 5) it is to some degree magnetic QR-5) Surrounding every stationary electron is 1) a magnetic field 2) an electric field 3) both of these 4) none of these QR-6) A Doppler effect occurs when the source of sound moves 1) towards you 2) away from you 3) both of these 4) none of these QR-7) Wave interference occurs for 1) sound waves 2) light waves 3) water waves 4) all of these 5) none of these QR-8) If a light signal and a radio signal were emitted simultaneously from Alpha Centauri, the first to reach Earth would be the 1) radio signal 2) light signal 3) both would reach Earth at the same time QR-9) A positive charge and a negative charge held near each other are released. As they move, the force on each particle 1) increases 2) decreases 3) stays the same QR-10) The headlights, radio, and defroster fan in an automobile are connected in 1) series 2) parallel QR-11) Unlike a transverse wave, a longitudinal wave has 1) no amplitude 2) no frequency 3) no wavelength 4) no speed 5) … a longitudinal wave has all of these QR-12) Red-hot and blue-hot stars appear white to the eye because 1) the eye has difficulty seeing color at night 2) they are too dim to fires the rods 3) they are too dim to fire the cones 4) they are overwhelmed by the blackness of the nighttime sky 5) eye receptivity peaks in the yellow-green part of the spectrum QR-13) Compared to the resistance of two resistors connected in series, the same two resistors connected in parallel have 1) more resistance 2) less resistance 3) the same resistance QR-14) Charge carriers in a metal are electrons rather than protons because electrons are 1) negative 2) smaller 3) loosely bound 4) all of these 5) none of these QR-15) Double the frequency of a sound wave and you halve its 1) wavelength 2) speed 3) amplitude 4) all of these 5) none of these QR-16) Outside a magnet, magnetic field lines are conventionally drawn from 1) north to south 2) south to north 3) either way Q27-1) An object that reflects light of all frequencies always appears white. 1) True 2) False Q27-2) An object that absorbs light of all frequencies always appears black. 1) True 2) False Q27-3) The worst thing you can do for the health of a green-leafed plant is to illuminate it with only 1) red light 2) green light 3) blue light 4) all are equally naughty 5) none of these Q27-4) Which will warm up quicker in sunlight? 1) a piece of colored glass 2) a piece of clear glass 3) both will warm up the same Q27-5) A sheet of red paper will look black when illuminated with 1) red light 2) yellow light 3) magenta light 4) cyan light 5) none of these Q27-6) White – blue = 1) red light 2) green light 3) magenta light 4) cyan light 5) yellow Q27-7) If the sky on a certain planet in the solar system were normally orange, what color would sunsets be? 1) orange 2) yellow 3) green 4) blue 5) none of these Q28-1) An observer O, facing a mirror, observes a light source S. Where does O perceive the mirror image of S to be located? 1) 1 2) 2 3) 3 4) 4 5) some other location Q28-2) When you look at yourself in a (plane) pocket mirror, and then hold the mirror farther away, you see 1) more of yourself 2) less of yourself 3) the same amount of yourself Q28-3) Which kind of road surface is it easier to see when driving at night, a pebbled uneven surface or a mirror-smooth surface? 1) a pebbled uneven surface 2) a mirror-smooth surface 3) they are both the same Q28-4) A light ray passes from water into air. Of the diagrams below, which most clearly resembles the light ray’s path? 1) I 2) II 3) III Q28-5) (a) If while standing on a bank you wished to spear a fish in front of you, would you aim above, below, or directly at the observed fish to make a direct hit? (b) If instead, you zapped the fish with a laser, would you aim above, below, or directly at the observed fish? 1) (a) above 2) (a) above 3) (a) below 4) (a) below 5) (a) below (b) above (b) directly at (b) above (b) below (b) directly at Q28-6) A primary rainbow is brighter than a secondary rainbow because 1) larger raindrops produce primary rainbows 2) the secondary bow is a dim reflection of the primary bow 3) there is one less reflection (and refraction) inside the water drops 4) it is closer to the viewer Q35-1) Two lightning bolts are seen to strike two distant locations at the same time. Seen from a different location, the two lightning bolts 1) will also be seen at the same time 2) will not be seen at the same time 3) may or may not be seen at the same time Q35-2) Event A occurs before event B in a certain frame of reference. In another frame of reference, event A could occur 1) after event B 2) simultaneous with event B 3) either of these 4) neither of these Q35-3) Suppose you and your sister travel in space in such a way that you notice a slowing of time for your sister. Your sister will notice that your time runs 1) faster than hers 2) slower than hers 3) the same as hers 4) not enough information given Q35-4) According to the special theory of relativity, if you measure your own pulse while traveling at very high speeds, you would notice your pulse rate to 1) increase 2) decrease 3) be the same as usual Q35-5) A twin who makes a long trip at relativistic speeds returns younger than his stayat-home twin sister. Could he return before his twin sister was born? 1) yes 2) no Q35-6) A 10 meter long spear is thrown at relativistic speeds through a 10 meter long pipe (both lengths are measured when each is at rest). When the spear passes through the pipe, which of the following statements is true? 1) the spear shrinks so the pipe completely covers it 2) the pipe shrinks so the spear extends from both ends 3) either of these, depending upon the motion of the observer (i.e. moving with the spear, at rest with the pipe) 4) none of these Q35-7) Relativity equations for time and length hold true for 1) relativistic speeds 2) everyday low speeds 3) both of these 4) none of these Q35-8) Two safety pins, identical except that one is latched and one is unlatched, are placed in identical acid baths. After the pins are dissolved, is anything different in the two acid baths? 1) yes 2) no QR-1) Which of the following statements is true? 1) An atom is the smallest particle known to exist. 2) There are only about 100 different kinds of atoms that combine to form all substances. 3) There are thousands of different kinds of atoms that account for a wide variety of substances. 4) All carbon atoms contain the same number of neutrons. 5) None of the above QR-2) For a freely falling object, how many of the following statements are true? (a) the distance fallen during each second keeps increasing; (b) the speed keeps increasing; (c) the change in speed during each second keeps increasing; (d) the acceleration keeps increasing. 1) 1 2) 2 3) 3 4) 4 5) none QR-3) A 10-kg brick and a 1-kg brick are both dropped in a vacuum. The force of gravity on the 10-kg brick is 1) the same as the force on the 1-kg book 2) 10 times as much as the force on the 1-kg book 3) zero QR-4) If we do not ignore air resistance, when an object falls through the air, its velocity increases and its acceleration 1) increases 2) decreases 3) stays the same QR-5) A book at rest on the table has two forces on it: gravity pulling it down and the support force pushing it up. Are these forces an action/reaction pair? 1) yes 2) no QR-6) If two neutrons are added to an oxygen nucleus, the result is 1) nitrogen 2) carbon 3) helium 4) neon 5) none of the above QR-7) If the frequency of sound is doubled, what change will occur in (a) its speed? (b) In its wavelength? 1) (a) double 2) (a) double 3) (a) remain the same 4) (a) remain the same 5) (a) cut in half (b) double (b) cut in half (b) double (b) cut in half (b) remain the same QR-8) Particle A and particle B interact with each other. Particle A has twice the charge of particle B. Compared to the force on particle A, the force on particle B is 1) four times as much 2) twice as much 3) the same 4) half as much 5) one-fourth as much QR-9) (a) Can an electron at rest in a magnetic field be set into motion by the magnetic field? (b) Can an electron at rest in an electric field be set into motion by the electric field? 1) (a) yes 2) (a) yes 3) (a) no 4) (a) no (b) yes (b) no (b) no (b) yes QR-10) Things seen by moonlight aren’t colored because moonlight 1) doesn’t have many colors in it 2) is too dim to activate the retina’s cones 3) is too dim to activate the retina’s rods 4) all of these 5) none of these QR-11) While a car travels around a circular track at constant speed its 1) acceleration is zero 2) velocity is zero 3) both of these 4) none of these QR-12) If an object falls with constant acceleration, the velocity of the object must 1) be constant also 2) continuously change by the same amount each second 3) continuously change by varying amounts depending on its speed 4) continuously decrease 5) none of these QR-13) One car is driving 50 mi/hr and another car of the same mass is driving 100 mi/hr. Both cars slam on the brakes and skid to a halt. If the force of friction is the same for both cars, how much farther will the faster car skid? 1) they will skid the same distance 2) twice as far 3) four times as far 4) sixteen times as far 5) none of the above QR-14) A suction cup sticks to a wall. It is 1) pulled to the wall by the vacuum 2) pushed to the wall by the atmosphere 3) both of these 4) none of the above QR-15) Which of the following electromagnetic waves has the shortest wavelength 1) radio waves 2) infrared waves 3) X-rays 4) ultraviolet waves 5) light waves QR-16) If a light signal and a radio signal were emitted simultaneously from Alpha Centauri, the first to reach Earth would be the 1) radio signal 2) light signal 3) both would reach Earth at the same time