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Question based on the following passage.This passage is from S. K. Mukherjee, “The Mysteries of the Strong Nuclear Force ." ©2015 College Hill Coaching.As any good contractor will tell you, a soundstructure requires stable materials. But atoms,the building blocks of everything we know andlove—bunnies, brownies, and best friends—(5) dont appear to be models of stability. Why aresome atoms, like sodium, so hyperactive whileothers, like helium, are so aloof? Why do theelectrons that inhabit atoms jump around sostrangely, from one bizarrely shaped orbital to(10) another? And why do protons, the bits thatgive atoms their heft and personality, sticktogether at all?We are told that every atom has a tinynucleus containing positively charged protons(15) and uncharged neutrons, swarmed by a cloudof speedy electrons. We are also told that likecharges, such as protons, repel each other witha force that shoots up to infinity as they getcloser. Even worse, you cant get much closer(20) than two protons in the nucleus of an atom. Sowhats keeping atomic nuclei from flying apart?Obviously, some other force must be at workinside the atom, something that we cant detect atour human scale. Physicists call this the(25) “strong nuclear force.” But where does itcome from?In order for this force to account for thebinding of protons in the nucleus, it must havecertain interesting features. First, it cant have any(30) sizeable effect beyond the radius of the atom itself,or it would play havoc with the nuclei of adjacentatoms, destroying matter as we know it. Second,it must perfectly balance the repulsive force ofelectricity at an “equilibrium point” of about(35) 0.7 x 10-15 meters, the average distance betweenbound protons, in order to create a stable nucleus.Third, it must repel at even shorter distances, orelse neutrons (which dont have any electrostaticrepulsion to balance the strong nuclear force)(40) would collapse into each other. The graphshows the behavior of such a force relativeto the repulsive electrostatic force.In 1935, Japanese physicist Hideki Yukawaproposed that the nuclear force was conveyed by(45) a then-undiscovered heavy subatomic particlehe called the pi meson (or “pion”), which (unlikethe photon, which conveys the electrostaticforce) decays very quickly and therefore conveys apowerful force only over a very short distance.(50) Professor Yukawas theory, however, wasdealt a mortal blow by a series of experimentsconducted at Los Alamos National Laboratoryin the early 1990s that demonstrated that pionscarry force only over distances greater than the(55) distance between bound protons. The pion was aplumbers wrench trying to do a tweezers job.Current atomic theory suggests that thestrong nuclear force is most likely conveyed bymassless particles called “gluons” according(60) to the theory of quantum chromodynamics, orQCD for short. According to QCD, protons andneutrons are composed of smaller particlescalled quarks, which are held together by theaptly named gluons. This quark-binding force has(65) a “residue” that extends beyond the protons andneutrons themselves to provide just enough forceto bind the protons and neutrons together.If youre hoping that QCD ties up atomicbehavior with a tidy little bow, you may be just(70) a bit disappointed. As a quantum theory, itconceives of space and time as tiny chunks thatoccasionally misbehave, rather than smoothpredictable quantities, and its mathematicalformulas are perhaps as hard to penetrate as the(75) nucleus itself.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 2–5 (“But atoms . . . stability”)b)Lines 19–20 (“Even worse . . . an atom”)c)Lines 55–56 (“The pion . . . tweezer’s job”)d)Lines 68–70 (“If you’re . . . disappointed”)Correct answer is option 'A'. Can you explain this answer? for SAT 2025 is part of SAT preparation. The Question and answers have been prepared according to the SAT exam syllabus. Information about Question based on the following passage.This passage is from S. K. Mukherjee, “The Mysteries of the Strong Nuclear Force ." ©2015 College Hill Coaching.As any good contractor will tell you, a soundstructure requires stable materials. But atoms,the building blocks of everything we know andlove—bunnies, brownies, and best friends—(5) dont appear to be models of stability. Why aresome atoms, like sodium, so hyperactive whileothers, like helium, are so aloof? Why do theelectrons that inhabit atoms jump around sostrangely, from one bizarrely shaped orbital to(10) another? And why do protons, the bits thatgive atoms their heft and personality, sticktogether at all?We are told that every atom has a tinynucleus containing positively charged protons(15) and uncharged neutrons, swarmed by a cloudof speedy electrons. We are also told that likecharges, such as protons, repel each other witha force that shoots up to infinity as they getcloser. Even worse, you cant get much closer(20) than two protons in the nucleus of an atom. Sowhats keeping atomic nuclei from flying apart?Obviously, some other force must be at workinside the atom, something that we cant detect atour human scale. Physicists call this the(25) “strong nuclear force.” But where does itcome from?In order for this force to account for thebinding of protons in the nucleus, it must havecertain interesting features. First, it cant have any(30) sizeable effect beyond the radius of the atom itself,or it would play havoc with the nuclei of adjacentatoms, destroying matter as we know it. Second,it must perfectly balance the repulsive force ofelectricity at an “equilibrium point” of about(35) 0.7 x 10-15 meters, the average distance betweenbound protons, in order to create a stable nucleus.Third, it must repel at even shorter distances, orelse neutrons (which dont have any electrostaticrepulsion to balance the strong nuclear force)(40) would collapse into each other. The graphshows the behavior of such a force relativeto the repulsive electrostatic force.In 1935, Japanese physicist Hideki Yukawaproposed that the nuclear force was conveyed by(45) a then-undiscovered heavy subatomic particlehe called the pi meson (or “pion”), which (unlikethe photon, which conveys the electrostaticforce) decays very quickly and therefore conveys apowerful force only over a very short distance.(50) Professor Yukawas theory, however, wasdealt a mortal blow by a series of experimentsconducted at Los Alamos National Laboratoryin the early 1990s that demonstrated that pionscarry force only over distances greater than the(55) distance between bound protons. The pion was aplumbers wrench trying to do a tweezers job.Current atomic theory suggests that thestrong nuclear force is most likely conveyed bymassless particles called “gluons” according(60) to the theory of quantum chromodynamics, orQCD for short. According to QCD, protons andneutrons are composed of smaller particlescalled quarks, which are held together by theaptly named gluons. This quark-binding force has(65) a “residue” that extends beyond the protons andneutrons themselves to provide just enough forceto bind the protons and neutrons together.If youre hoping that QCD ties up atomicbehavior with a tidy little bow, you may be just(70) a bit disappointed. As a quantum theory, itconceives of space and time as tiny chunks thatoccasionally misbehave, rather than smoothpredictable quantities, and its mathematicalformulas are perhaps as hard to penetrate as the(75) nucleus itself.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 2–5 (“But atoms . . . stability”)b)Lines 19–20 (“Even worse . . . an atom”)c)Lines 55–56 (“The pion . . . tweezer’s job”)d)Lines 68–70 (“If you’re . . . disappointed”)Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for SAT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Question based on the following passage.This passage is from S. K. Mukherjee, “The Mysteries of the Strong Nuclear Force ." ©2015 College Hill Coaching.As any good contractor will tell you, a soundstructure requires stable materials. But atoms,the building blocks of everything we know andlove—bunnies, brownies, and best friends—(5) dont appear to be models of stability. Why aresome atoms, like sodium, so hyperactive whileothers, like helium, are so aloof? Why do theelectrons that inhabit atoms jump around sostrangely, from one bizarrely shaped orbital to(10) another? And why do protons, the bits thatgive atoms their heft and personality, sticktogether at all?We are told that every atom has a tinynucleus containing positively charged protons(15) and uncharged neutrons, swarmed by a cloudof speedy electrons. We are also told that likecharges, such as protons, repel each other witha force that shoots up to infinity as they getcloser. Even worse, you cant get much closer(20) than two protons in the nucleus of an atom. Sowhats keeping atomic nuclei from flying apart?Obviously, some other force must be at workinside the atom, something that we cant detect atour human scale. Physicists call this the(25) “strong nuclear force.” But where does itcome from?In order for this force to account for thebinding of protons in the nucleus, it must havecertain interesting features. First, it cant have any(30) sizeable effect beyond the radius of the atom itself,or it would play havoc with the nuclei of adjacentatoms, destroying matter as we know it. Second,it must perfectly balance the repulsive force ofelectricity at an “equilibrium point” of about(35) 0.7 x 10-15 meters, the average distance betweenbound protons, in order to create a stable nucleus.Third, it must repel at even shorter distances, orelse neutrons (which dont have any electrostaticrepulsion to balance the strong nuclear force)(40) would collapse into each other. The graphshows the behavior of such a force relativeto the repulsive electrostatic force.In 1935, Japanese physicist Hideki Yukawaproposed that the nuclear force was conveyed by(45) a then-undiscovered heavy subatomic particlehe called the pi meson (or “pion”), which (unlikethe photon, which conveys the electrostaticforce) decays very quickly and therefore conveys apowerful force only over a very short distance.(50) Professor Yukawas theory, however, wasdealt a mortal blow by a series of experimentsconducted at Los Alamos National Laboratoryin the early 1990s that demonstrated that pionscarry force only over distances greater than the(55) distance between bound protons. The pion was aplumbers wrench trying to do a tweezers job.Current atomic theory suggests that thestrong nuclear force is most likely conveyed bymassless particles called “gluons” according(60) to the theory of quantum chromodynamics, orQCD for short. According to QCD, protons andneutrons are composed of smaller particlescalled quarks, which are held together by theaptly named gluons. This quark-binding force has(65) a “residue” that extends beyond the protons andneutrons themselves to provide just enough forceto bind the protons and neutrons together.If youre hoping that QCD ties up atomicbehavior with a tidy little bow, you may be just(70) a bit disappointed. As a quantum theory, itconceives of space and time as tiny chunks thatoccasionally misbehave, rather than smoothpredictable quantities, and its mathematicalformulas are perhaps as hard to penetrate as the(75) nucleus itself.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 2–5 (“But atoms . . . stability”)b)Lines 19–20 (“Even worse . . . an atom”)c)Lines 55–56 (“The pion . . . tweezer’s job”)d)Lines 68–70 (“If you’re . . . disappointed”)Correct answer is option 'A'. Can you explain this answer?.

Solutions for Question based on the following passage.This passage is from S. K. Mukherjee, “The Mysteries of the Strong Nuclear Force ." ©2015 College Hill Coaching.As any good contractor will tell you, a soundstructure requires stable materials. But atoms,the building blocks of everything we know andlove—bunnies, brownies, and best friends—(5) dont appear to be models of stability. Why aresome atoms, like sodium, so hyperactive whileothers, like helium, are so aloof? Why do theelectrons that inhabit atoms jump around sostrangely, from one bizarrely shaped orbital to(10) another? And why do protons, the bits thatgive atoms their heft and personality, sticktogether at all?We are told that every atom has a tinynucleus containing positively charged protons(15) and uncharged neutrons, swarmed by a cloudof speedy electrons. We are also told that likecharges, such as protons, repel each other witha force that shoots up to infinity as they getcloser. Even worse, you cant get much closer(20) than two protons in the nucleus of an atom. Sowhats keeping atomic nuclei from flying apart?Obviously, some other force must be at workinside the atom, something that we cant detect atour human scale. Physicists call this the(25) “strong nuclear force.” But where does itcome from?In order for this force to account for thebinding of protons in the nucleus, it must havecertain interesting features. First, it cant have any(30) sizeable effect beyond the radius of the atom itself,or it would play havoc with the nuclei of adjacentatoms, destroying matter as we know it. Second,it must perfectly balance the repulsive force ofelectricity at an “equilibrium point” of about(35) 0.7 x 10-15 meters, the average distance betweenbound protons, in order to create a stable nucleus.Third, it must repel at even shorter distances, orelse neutrons (which dont have any electrostaticrepulsion to balance the strong nuclear force)(40) would collapse into each other. The graphshows the behavior of such a force relativeto the repulsive electrostatic force.In 1935, Japanese physicist Hideki Yukawaproposed that the nuclear force was conveyed by(45) a then-undiscovered heavy subatomic particlehe called the pi meson (or “pion”), which (unlikethe photon, which conveys the electrostaticforce) decays very quickly and therefore conveys apowerful force only over a very short distance.(50) Professor Yukawas theory, however, wasdealt a mortal blow by a series of experimentsconducted at Los Alamos National Laboratoryin the early 1990s that demonstrated that pionscarry force only over distances greater than the(55) distance between bound protons. The pion was aplumbers wrench trying to do a tweezers job.Current atomic theory suggests that thestrong nuclear force is most likely conveyed bymassless particles called “gluons” according(60) to the theory of quantum chromodynamics, orQCD for short. According to QCD, protons andneutrons are composed of smaller particlescalled quarks, which are held together by theaptly named gluons. This quark-binding force has(65) a “residue” that extends beyond the protons andneutrons themselves to provide just enough forceto bind the protons and neutrons together.If youre hoping that QCD ties up atomicbehavior with a tidy little bow, you may be just(70) a bit disappointed. As a quantum theory, itconceives of space and time as tiny chunks thatoccasionally misbehave, rather than smoothpredictable quantities, and its mathematicalformulas are perhaps as hard to penetrate as the(75) nucleus itself.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 2–5 (“But atoms . . . stability”)b)Lines 19–20 (“Even worse . . . an atom”)c)Lines 55–56 (“The pion . . . tweezer’s job”)d)Lines 68–70 (“If you’re . . . disappointed”)Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for SAT. Download more important topics, notes, lectures and mock test series for SAT Exam by signing up for free.

Here you can find the meaning of Question based on the following passage.This passage is from S. K. Mukherjee, “The Mysteries of the Strong Nuclear Force ." ©2015 College Hill Coaching.As any good contractor will tell you, a soundstructure requires stable materials. But atoms,the building blocks of everything we know andlove—bunnies, brownies, and best friends—(5) dont appear to be models of stability. Why aresome atoms, like sodium, so hyperactive whileothers, like helium, are so aloof? Why do theelectrons that inhabit atoms jump around sostrangely, from one bizarrely shaped orbital to(10) another? And why do protons, the bits thatgive atoms their heft and personality, sticktogether at all?We are told that every atom has a tinynucleus containing positively charged protons(15) and uncharged neutrons, swarmed by a cloudof speedy electrons. We are also told that likecharges, such as protons, repel each other witha force that shoots up to infinity as they getcloser. Even worse, you cant get much closer(20) than two protons in the nucleus of an atom. Sowhats keeping atomic nuclei from flying apart?Obviously, some other force must be at workinside the atom, something that we cant detect atour human scale. Physicists call this the(25) “strong nuclear force.” But where does itcome from?In order for this force to account for thebinding of protons in the nucleus, it must havecertain interesting features. First, it cant have any(30) sizeable effect beyond the radius of the atom itself,or it would play havoc with the nuclei of adjacentatoms, destroying matter as we know it. Second,it must perfectly balance the repulsive force ofelectricity at an “equilibrium point” of about(35) 0.7 x 10-15 meters, the average distance betweenbound protons, in order to create a stable nucleus.Third, it must repel at even shorter distances, orelse neutrons (which dont have any electrostaticrepulsion to balance the strong nuclear force)(40) would collapse into each other. The graphshows the behavior of such a force relativeto the repulsive electrostatic force.In 1935, Japanese physicist Hideki Yukawaproposed that the nuclear force was conveyed by(45) a then-undiscovered heavy subatomic particlehe called the pi meson (or “pion”), which (unlikethe photon, which conveys the electrostaticforce) decays very quickly and therefore conveys apowerful force only over a very short distance.(50) Professor Yukawas theory, however, wasdealt a mortal blow by a series of experimentsconducted at Los Alamos National Laboratoryin the early 1990s that demonstrated that pionscarry force only over distances greater than the(55) distance between bound protons. The pion was aplumbers wrench trying to do a tweezers job.Current atomic theory suggests that thestrong nuclear force is most likely conveyed bymassless particles called “gluons” according(60) to the theory of quantum chromodynamics, orQCD for short. According to QCD, protons andneutrons are composed of smaller particlescalled quarks, which are held together by theaptly named gluons. This quark-binding force has(65) a “residue” that extends beyond the protons andneutrons themselves to provide just enough forceto bind the protons and neutrons together.If youre hoping that QCD ties up atomicbehavior with a tidy little bow, you may be just(70) a bit disappointed. As a quantum theory, itconceives of space and time as tiny chunks thatoccasionally misbehave, rather than smoothpredictable quantities, and its mathematicalformulas are perhaps as hard to penetrate as the(75) nucleus itself.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 2–5 (“But atoms . . . stability”)b)Lines 19–20 (“Even worse . . . an atom”)c)Lines 55–56 (“The pion . . . tweezer’s job”)d)Lines 68–70 (“If you’re . . . disappointed”)Correct answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Question based on the following passage.This passage is from S. K. Mukherjee, “The Mysteries of the Strong Nuclear Force ." ©2015 College Hill Coaching.As any good contractor will tell you, a soundstructure requires stable materials. But atoms,the building blocks of everything we know andlove—bunnies, brownies, and best friends—(5) dont appear to be models of stability. Why aresome atoms, like sodium, so hyperactive whileothers, like helium, are so aloof? Why do theelectrons that inhabit atoms jump around sostrangely, from one bizarrely shaped orbital to(10) another? And why do protons, the bits thatgive atoms their heft and personality, sticktogether at all?We are told that every atom has a tinynucleus containing positively charged protons(15) and uncharged neutrons, swarmed by a cloudof speedy electrons. We are also told that likecharges, such as protons, repel each other witha force that shoots up to infinity as they getcloser. Even worse, you cant get much closer(20) than two protons in the nucleus of an atom. Sowhats keeping atomic nuclei from flying apart?Obviously, some other force must be at workinside the atom, something that we cant detect atour human scale. Physicists call this the(25) “strong nuclear force.” But where does itcome from?In order for this force to account for thebinding of protons in the nucleus, it must havecertain interesting features. First, it cant have any(30) sizeable effect beyond the radius of the atom itself,or it would play havoc with the nuclei of adjacentatoms, destroying matter as we know it. Second,it must perfectly balance the repulsive force ofelectricity at an “equilibrium point” of about(35) 0.7 x 10-15 meters, the average distance betweenbound protons, in order to create a stable nucleus.Third, it must repel at even shorter distances, orelse neutrons (which dont have any electrostaticrepulsion to balance the strong nuclear force)(40) would collapse into each other. The graphshows the behavior of such a force relativeto the repulsive electrostatic force.In 1935, Japanese physicist Hideki Yukawaproposed that the nuclear force was conveyed by(45) a then-undiscovered heavy subatomic particlehe called the pi meson (or “pion”), which (unlikethe photon, which conveys the electrostaticforce) decays very quickly and therefore conveys apowerful force only over a very short distance.(50) Professor Yukawas theory, however, wasdealt a mortal blow by a series of experimentsconducted at Los Alamos National Laboratoryin the early 1990s that demonstrated that pionscarry force only over distances greater than the(55) distance between bound protons. The pion was aplumbers wrench trying to do a tweezers job.Current atomic theory suggests that thestrong nuclear force is most likely conveyed bymassless particles called “gluons” according(60) to the theory of quantum chromodynamics, orQCD for short. According to QCD, protons andneutrons are composed of smaller particlescalled quarks, which are held together by theaptly named gluons. This quark-binding force has(65) a “residue” that extends beyond the protons andneutrons themselves to provide just enough forceto bind the protons and neutrons together.If youre hoping that QCD ties up atomicbehavior with a tidy little bow, you may be just(70) a bit disappointed. As a quantum theory, itconceives of space and time as tiny chunks thatoccasionally misbehave, rather than smoothpredictable quantities, and its mathematicalformulas are perhaps as hard to penetrate as the(75) nucleus itself.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 2–5 (“But atoms . . . stability”)b)Lines 19–20 (“Even worse . . . an atom”)c)Lines 55–56 (“The pion . . . tweezer’s job”)d)Lines 68–70 (“If you’re . . . disappointed”)Correct answer is option 'A'. Can you explain this answer?, a detailed solution for Question based on the following passage.This passage is from S. K. Mukherjee, “The Mysteries of the Strong Nuclear Force ." ©2015 College Hill Coaching.As any good contractor will tell you, a soundstructure requires stable materials. But atoms,the building blocks of everything we know andlove—bunnies, brownies, and best friends—(5) dont appear to be models of stability. Why aresome atoms, like sodium, so hyperactive whileothers, like helium, are so aloof? Why do theelectrons that inhabit atoms jump around sostrangely, from one bizarrely shaped orbital to(10) another? And why do protons, the bits thatgive atoms their heft and personality, sticktogether at all?We are told that every atom has a tinynucleus containing positively charged protons(15) and uncharged neutrons, swarmed by a cloudof speedy electrons. We are also told that likecharges, such as protons, repel each other witha force that shoots up to infinity as they getcloser. Even worse, you cant get much closer(20) than two protons in the nucleus of an atom. Sowhats keeping atomic nuclei from flying apart?Obviously, some other force must be at workinside the atom, something that we cant detect atour human scale. Physicists call this the(25) “strong nuclear force.” But where does itcome from?In order for this force to account for thebinding of protons in the nucleus, it must havecertain interesting features. First, it cant have any(30) sizeable effect beyond the radius of the atom itself,or it would play havoc with the nuclei of adjacentatoms, destroying matter as we know it. Second,it must perfectly balance the repulsive force ofelectricity at an “equilibrium point” of about(35) 0.7 x 10-15 meters, the average distance betweenbound protons, in order to create a stable nucleus.Third, it must repel at even shorter distances, orelse neutrons (which dont have any electrostaticrepulsion to balance the strong nuclear force)(40) would collapse into each other. The graphshows the behavior of such a force relativeto the repulsive electrostatic force.In 1935, Japanese physicist Hideki Yukawaproposed that the nuclear force was conveyed by(45) a then-undiscovered heavy subatomic particlehe called the pi meson (or “pion”), which (unlikethe photon, which conveys the electrostaticforce) decays very quickly and therefore conveys apowerful force only over a very short distance.(50) Professor Yukawas theory, however, wasdealt a mortal blow by a series of experimentsconducted at Los Alamos National Laboratoryin the early 1990s that demonstrated that pionscarry force only over distances greater than the(55) distance between bound protons. The pion was aplumbers wrench trying to do a tweezers job.Current atomic theory suggests that thestrong nuclear force is most likely conveyed bymassless particles called “gluons” according(60) to the theory of quantum chromodynamics, orQCD for short. According to QCD, protons andneutrons are composed of smaller particlescalled quarks, which are held together by theaptly named gluons. This quark-binding force has(65) a “residue” that extends beyond the protons andneutrons themselves to provide just enough forceto bind the protons and neutrons together.If youre hoping that QCD ties up atomicbehavior with a tidy little bow, you may be just(70) a bit disappointed. As a quantum theory, itconceives of space and time as tiny chunks thatoccasionally misbehave, rather than smoothpredictable quantities, and its mathematicalformulas are perhaps as hard to penetrate as the(75) nucleus itself.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 2–5 (“But atoms . . . stability”)b)Lines 19–20 (“Even worse . . . an atom”)c)Lines 55–56 (“The pion . . . tweezer’s job”)d)Lines 68–70 (“If you’re . . . disappointed”)Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of Question based on the following passage.This passage is from S. K. Mukherjee, “The Mysteries of the Strong Nuclear Force ." ©2015 College Hill Coaching.As any good contractor will tell you, a soundstructure requires stable materials. But atoms,the building blocks of everything we know andlove—bunnies, brownies, and best friends—(5) dont appear to be models of stability. Why aresome atoms, like sodium, so hyperactive whileothers, like helium, are so aloof? Why do theelectrons that inhabit atoms jump around sostrangely, from one bizarrely shaped orbital to(10) another? And why do protons, the bits thatgive atoms their heft and personality, sticktogether at all?We are told that every atom has a tinynucleus containing positively charged protons(15) and uncharged neutrons, swarmed by a cloudof speedy electrons. We are also told that likecharges, such as protons, repel each other witha force that shoots up to infinity as they getcloser. Even worse, you cant get much closer(20) than two protons in the nucleus of an atom. Sowhats keeping atomic nuclei from flying apart?Obviously, some other force must be at workinside the atom, something that we cant detect atour human scale. Physicists call this the(25) “strong nuclear force.” But where does itcome from?In order for this force to account for thebinding of protons in the nucleus, it must havecertain interesting features. First, it cant have any(30) sizeable effect beyond the radius of the atom itself,or it would play havoc with the nuclei of adjacentatoms, destroying matter as we know it. Second,it must perfectly balance the repulsive force ofelectricity at an “equilibrium point” of about(35) 0.7 x 10-15 meters, the average distance betweenbound protons, in order to create a stable nucleus.Third, it must repel at even shorter distances, orelse neutrons (which dont have any electrostaticrepulsion to balance the strong nuclear force)(40) would collapse into each other. The graphshows the behavior of such a force relativeto the repulsive electrostatic force.In 1935, Japanese physicist Hideki Yukawaproposed that the nuclear force was conveyed by(45) a then-undiscovered heavy subatomic particlehe called the pi meson (or “pion”), which (unlikethe photon, which conveys the electrostaticforce) decays very quickly and therefore conveys apowerful force only over a very short distance.(50) Professor Yukawas theory, however, wasdealt a mortal blow by a series of experimentsconducted at Los Alamos National Laboratoryin the early 1990s that demonstrated that pionscarry force only over distances greater than the(55) distance between bound protons. The pion was aplumbers wrench trying to do a tweezers job.Current atomic theory suggests that thestrong nuclear force is most likely conveyed bymassless particles called “gluons” according(60) to the theory of quantum chromodynamics, orQCD for short. According to QCD, protons andneutrons are composed of smaller particlescalled quarks, which are held together by theaptly named gluons. This quark-binding force has(65) a “residue” that extends beyond the protons andneutrons themselves to provide just enough forceto bind the protons and neutrons together.If youre hoping that QCD ties up atomicbehavior with a tidy little bow, you may be just(70) a bit disappointed. As a quantum theory, itconceives of space and time as tiny chunks thatoccasionally misbehave, rather than smoothpredictable quantities, and its mathematicalformulas are perhaps as hard to penetrate as the(75) nucleus itself.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 2–5 (“But atoms . . . stability”)b)Lines 19–20 (“Even worse . . . an atom”)c)Lines 55–56 (“The pion . . . tweezer’s job”)d)Lines 68–70 (“If you’re . . . disappointed”)Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Question based on the following passage.This passage is from S. K. Mukherjee, “The Mysteries of the Strong Nuclear Force ." ©2015 College Hill Coaching.As any good contractor will tell you, a soundstructure requires stable materials. But atoms,the building blocks of everything we know andlove—bunnies, brownies, and best friends—(5) dont appear to be models of stability. Why aresome atoms, like sodium, so hyperactive whileothers, like helium, are so aloof? Why do theelectrons that inhabit atoms jump around sostrangely, from one bizarrely shaped orbital to(10) another? And why do protons, the bits thatgive atoms their heft and personality, sticktogether at all?We are told that every atom has a tinynucleus containing positively charged protons(15) and uncharged neutrons, swarmed by a cloudof speedy electrons. We are also told that likecharges, such as protons, repel each other witha force that shoots up to infinity as they getcloser. Even worse, you cant get much closer(20) than two protons in the nucleus of an atom. Sowhats keeping atomic nuclei from flying apart?Obviously, some other force must be at workinside the atom, something that we cant detect atour human scale. Physicists call this the(25) “strong nuclear force.” But where does itcome from?In order for this force to account for thebinding of protons in the nucleus, it must havecertain interesting features. First, it cant have any(30) sizeable effect beyond the radius of the atom itself,or it would play havoc with the nuclei of adjacentatoms, destroying matter as we know it. Second,it must perfectly balance the repulsive force ofelectricity at an “equilibrium point” of about(35) 0.7 x 10-15 meters, the average distance betweenbound protons, in order to create a stable nucleus.Third, it must repel at even shorter distances, orelse neutrons (which dont have any electrostaticrepulsion to balance the strong nuclear force)(40) would collapse into each other. The graphshows the behavior of such a force relativeto the repulsive electrostatic force.In 1935, Japanese physicist Hideki Yukawaproposed that the nuclear force was conveyed by(45) a then-undiscovered heavy subatomic particlehe called the pi meson (or “pion”), which (unlikethe photon, which conveys the electrostaticforce) decays very quickly and therefore conveys apowerful force only over a very short distance.(50) Professor Yukawas theory, however, wasdealt a mortal blow by a series of experimentsconducted at Los Alamos National Laboratoryin the early 1990s that demonstrated that pionscarry force only over distances greater than the(55) distance between bound protons. The pion was aplumbers wrench trying to do a tweezers job.Current atomic theory suggests that thestrong nuclear force is most likely conveyed bymassless particles called “gluons” according(60) to the theory of quantum chromodynamics, orQCD for short. According to QCD, protons andneutrons are composed of smaller particlescalled quarks, which are held together by theaptly named gluons. This quark-binding force has(65) a “residue” that extends beyond the protons andneutrons themselves to provide just enough forceto bind the protons and neutrons together.If youre hoping that QCD ties up atomicbehavior with a tidy little bow, you may be just(70) a bit disappointed. As a quantum theory, itconceives of space and time as tiny chunks thatoccasionally misbehave, rather than smoothpredictable quantities, and its mathematicalformulas are perhaps as hard to penetrate as the(75) nucleus itself.Q.Which sentence provides the best evidence for the answer to the previous question?a)Lines 2–5 (“But atoms . . . stability”)b)Lines 19–20 (“Even worse . . . an atom”)c)Lines 55–56 (“The pion . . . tweezer’s job”)d)Lines 68–70 (“If you’re . . . disappointed”)Correct answer is option 'A'. 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