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Would it be possible to detect on Earth sounds produced on another planet if you had a dector sensitive enough to very low intensity sounds ?

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No (due to absence of a material medium between the planet and the Earth).

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Updated on:21/07/2023
Class 9PHYSICSSOUND

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Knowledge Check

  • Question 1 - Select One

    Given below are four jumbled sentences pick the option that gives the logically correct order of the four sentences. A. So, clearly, where you get your news from matters, since you can’t possibly be expected to verify and authenticate every bit of ‘news’ you receive. B. Are you really sure those apparently sound bits of medicaladvice you received as forwards would pass muster with your doctor?
    C. Yet, we do often forward these in the belief that we are d oing a good deed to our friends and relatives.
    D. Being educated is no guarantee against falling prey to fake news. (a) DBCA (b) ACBD (c) CADB (d) BACD

    ADBCA
    BACBD
    CCADB
    DBACD
  • Question 1 - Select One

    Given below are four jumbled sentences. Select the option that gives their correct order.
    A. So, clearly, where you get your news from matters, since you can’t possibly be expected to verify and authenticate every bit of ‘news’ you receive.
    B. Are you really sure those apparently sound bits of medical advice you received as forwards would pass muster with your doctor?
    C. Yet, we do often forward these in the belief that we are doing a good deed to our friends and relatives.
    D. Being educated is no guarantee against falling prey to fake news.

    ADBCA
    BBACD
    CCADB
    DACBD
  • Question 1 - Select One

    There are two ways in which, 'nonasserters' manage a conflict. Sometimes they ignore their needs. Faced with a constantly barking dog, for instance, a nonassertive person would try to forget the barking by closing the windows and trying to concentrate even harder. Another form of denial would be to claim that no problem exists-that a little barking never bothered anyone. To the degree that it's possible to make problems disappear by ignoring them, such an approach is probably advisable. In many cases, however, it simply isn't realistic to claim that nothing is wrong. For instance, if your health is beingjeopardized by the cigarette smoke from someone nearby, you are clearly punishing yourself by remaining silent. If you need to learn more information from a supervisor before undertaking a project, you reduce the quality ofyourworkby pretending that you understand it at all. If you claim that an unsatisfactory repair job is acceptable, you are paying good money for nothing. In all these and many more cases simply pretending that nothing is the matter when your needs continue to go unmet is clearly not the answer.
    A second nonassertive course of action is to acknowledge your needs are not being met but simply to accept the situation, hoping that it might clear up without any action on your part. You could, for instance, wait for the neighbour who owns the barking dog to move. Y ciu could wait for the dog to be run over by passing car or to die of old age. You could hope that your neighbour will realize how noisy the dog is and do something to keep it quiet. Each of these occurrences is a possibility, of course, but it would be unrealistic to count on one of them to solve your problem. And even if by chance you were lucky enough forthe dog problem to solve without taking action, you couldn't expect to be so fortunate in other parts of your life.
    In addition, while waiting for one of these eventualities, you would undoubtedly grow more and more angry at your neighbour, making a friendly relationship between the two of you impossible. You would also lose a degree of selfrespect, since you would see yourself as the kind of person who can't cope with even a common everyday irritation. Clearly, non-ssertion is not a very satisfying course of action either in this case or in other instances.
    'Acknowledge' in this passage means:

    AConfirm the receipt
    BExpress reservation
    CGive a grunt
    DRecognize
  • Question 1 - Select One

    There are two ways in which, 'nonasserters' manage a conflict. Sometimes they ignore their needs. Faced with a constantly barking dog, for instance, a nonassertive person would try to forget the barking by closing the windows and trying to concentrate even harder. Another form of denial would be to claim that no problem exists-that a little barking never bothered anyone. To the degree that it's possible to make problems disappear by ignoring them, such an approach is probably advisable. In many cases, however, it simply isn't realistic to claim that nothing is wrong. For instance, if your health is beingjeopardized by the cigarette smoke from someone nearby, you are clearly punishing yourself by remaining silent. If you need to learn more information from a supervisor before undertaking a project, you reduce the quality ofyourworkby pretending that you understand it at all. If you claim that an unsatisfactory repair job is acceptable, you are paying good money for nothing. In all these and many more cases simply pretending that nothing is the matter when your needs continue to go unmet is clearly not the answer.
    A second nonassertive course of action is to acknowledge your needs are not being met but simply to accept the situation, hoping that it might clear up without any action on your part. You could, for instance, wait for the neighbour who owns the barking dog to move. Y ciu could wait for the dog to be run over by passing car or to die of old age. You could hope that your neighbour will realize how noisy the dog is and do something to keep it quiet. Each of these occurrences is a possibility, of course, but it would be unrealistic to count on one of them to solve your problem. And even if by chance you were lucky enough forthe dog problem to solve without taking action, you couldn't expect to be so fortunate in other parts of your life.
    In addition, while waiting for one of these eventualities, you would undoubtedly grow more and more angry at your neighbour, making a friendly relationship between the two of you impossible. You would also lose a degree of selfrespect, since you would see yourself as the kind of person who can't cope with even a common everyday irritation. Clearly, non-ssertion is not a very satisfying course of action either in this case or in other instances.
    In case of the presence of a barking dog in the neighbourhood, a nonassertive person is likely to :

    APray to god to eliminate the dog for good.
    BSpeak to the neighbour who owns the dog.
    CClose the window or behave as if the dog is not there.
    DGet someone to keep the dog quiet.
  • Question 1 - Select One

    There are two ways in which, 'nonasserters' manage a conflict. Sometimes they ignore their needs. Faced with a constantly barking dog, for instance, a nonassertive person would try to forget the barking by closing the windows and trying to concentrate even harder. Another form of denial would be to claim that no problem exists-that a little barking never bothered anyone. To the degree that it's possible to make problems disappear by ignoring them, such an approach is probably advisable. In many cases, however, it simply isn't realistic to claim that nothing is wrong. For instance, if your health is beingjeopardized by the cigarette smoke from someone nearby, you are clearly punishing yourself by remaining silent. If you need to learn more information from a supervisor before undertaking a project, you reduce the quality ofyourworkby pretending that you understand it at all. If you claim that an unsatisfactory repair job is acceptable, you are paying good money for nothing. In all these and many more cases simply pretending that nothing is the matter when your needs continue to go unmet is clearly not the answer.
    A second nonassertive course of action is to acknowledge your needs are not being met but simply to accept the situation, hoping that it might clear up without any action on your part. You could, for instance, wait for the neighbour who owns the barking dog to move. Y ciu could wait for the dog to be run over by passing car or to die of old age. You could hope that your neighbour will realize how noisy the dog is and do something to keep it quiet. Each of these occurrences is a possibility, of course, but it would be unrealistic to count on one of them to solve your problem. And even if by chance you were lucky enough forthe dog problem to solve without taking action, you couldn't expect to be so fortunate in other parts of your life.
    In addition, while waiting for one of these eventualities, you would undoubtedly grow more and more angry at your neighbour, making a friendly relationship between the two of you impossible. You would also lose a degree of selfrespect, since you would see yourself as the kind of person who can't cope with even a common everyday irritation. Clearly, non-ssertion is not a very satisfying course of action either in this case or in other instances.
    'Nonasserters' manage a conflict by:

    AIgnoring their own needs and accepting the difficult situations.
    BIgnoring barking dogs as not being too bothersome
    CRemaining silent till they have gathered all information
    DWait for the problems to move away as pertheir destiny
  • Question 1 - Select One

    There are two ways in which, 'nonasserters' manage a conflict. Sometimes they ignore their needs. Faced with a constantly barking dog, for instance, a nonassertive person would try to forget the barking by closing the windows and trying to concentrate even harder. Another form of denial would be to claim that no problem exists-that a little barking never bothered anyone. To the degree that it's possible to make problems disappear by ignoring them, such an approach is probably advisable. In many cases, however, it simply isn't realistic to claim that nothing is wrong. For instance, if your health is beingjeopardized by the cigarette smoke from someone nearby, you are clearly punishing yourself by remaining silent. If you need to learn more information from a supervisor before undertaking a project, you reduce the quality ofyourworkby pretending that you understand it at all. If you claim that an unsatisfactory repair job is acceptable, you are paying good money for nothing. In all these and many more cases simply pretending that nothing is the matter when your needs continue to go unmet is clearly not the answer.
    A second nonassertive course of action is to acknowledge your needs are not being met but simply to accept the situation, hoping that it might clear up without any action on your part. You could, for instance, wait for the neighbour who owns the barking dog to move. Y ciu could wait for the dog to be run over by passing car or to die of old age. You could hope that your neighbour will realize how noisy the dog is and do something to keep it quiet. Each of these occurrences is a possibility, of course, but it would be unrealistic to count on one of them to solve your problem. And even if by chance you were lucky enough forthe dog problem to solve without taking action, you couldn't expect to be so fortunate in other parts of your life.
    In addition, while waiting for one of these eventualities, you would undoubtedly grow more and more angry at your neighbour, making a friendly relationship between the two of you impossible. You would also lose a degree of selfrespect, since you would see yourself as the kind of person who can't cope with even a common everyday irritation. Clearly, non-ssertion is not a very satisfying course of action either in this case or in other instances.
    Nonassertive behaviour cannot lead to.:

    AThe disappearance of the problem over a period of time.
    BSuffering due to one's unwillingness to act.
    CSomeone losing huge amounts of money.
    DA below par performance in individuals
  • Question 1 - Select One

    There are two ways in which, 'nonasserters' manage a conflict. Sometimes they ignore their needs. Faced with a constantly barking dog, for instance, a nonassertive person would try to forget the barking by closing the windows and trying to concentrate even harder. Another form of denial would be to claim that no problem exists-that a little barking never bothered anyone. To the degree that it's possible to make problems disappear by ignoring them, such an approach is probably advisable. In many cases, however, it simply isn't realistic to claim that nothing is wrong. For instance, if your health is beingjeopardized by the cigarette smoke from someone nearby, you are clearly punishing yourself by remaining silent. If you need to learn more information from a supervisor before undertaking a project, you reduce the quality ofyourworkby pretending that you understand it at all. If you claim that an unsatisfactory repair job is acceptable, you are paying good money for nothing. In all these and many more cases simply pretending that nothing is the matter when your needs continue to go unmet is clearly not the answer.
    A second nonassertive course of action is to acknowledge your needs are not being met but simply to accept the situation, hoping that it might clear up without any action on your part. You could, for instance, wait for the neighbour who owns the barking dog to move. Y ciu could wait for the dog to be run over by passing car or to die of old age. You could hope that your neighbour will realize how noisy the dog is and do something to keep it quiet. Each of these occurrences is a possibility, of course, but it would be unrealistic to count on one of them to solve your problem. And even if by chance you were lucky enough forthe dog problem to solve without taking action, you couldn't expect to be so fortunate in other parts of your life.
    In addition, while waiting for one of these eventualities, you would undoubtedly grow more and more angry at your neighbour, making a friendly relationship between the two of you impossible. You would also lose a degree of selfrespect, since you would see yourself as the kind of person who can't cope with even a common everyday irritation. Clearly, non-ssertion is not a very satisfying course of action either in this case or in other instances.
    The passage indicates that people who do not assert themselves are likely to :

    AGain accolades and respect from society
    BBecome friendly over a long period of time
    CTurn reclusive and guilty due to their lack of action
    DTend to get angry with people
  • Question 1 - Select One

    There are two ways in which, 'nonasserters' manage a conflict. Sometimes they ignore their needs. Faced with a constantly barking dog, for instance, a nonassertive person would try to forget the barking by closing the windows and trying to concentrate even harder. Another form of denial would be to claim that no problem exists-that a little barking never bothered anyone. To the degree that it's possible to make problems disappear by ignoring them, such an approach is probably advisable. In many cases, however, it simply isn't realistic to claim that nothing is wrong. For instance, if your health is beingjeopardized by the cigarette smoke from someone nearby, you are clearly punishing yourself by remaining silent. If you need to learn more information from a supervisor before undertaking a project, you reduce the quality ofyourworkby pretending that you understand it at all. If you claim that an unsatisfactory repair job is acceptable, you are paying good money for nothing. In all these and many more cases simply pretending that nothing is the matter when your needs continue to go unmet is clearly not the answer.
    A second nonassertive course of action is to acknowledge your needs are not being met but simply to accept the situation, hoping that it might clear up without any action on your part. You could, for instance, wait for the neighbour who owns the barking dog to move. Y ciu could wait for the dog to be run over by passing car or to die of old age. You could hope that your neighbour will realize how noisy the dog is and do something to keep it quiet. Each of these occurrences is a possibility, of course, but it would be unrealistic to count on one of them to solve your problem. And even if by chance you were lucky enough forthe dog problem to solve without taking action, you couldn't expect to be so fortunate in other parts of your life.
    In addition, while waiting for one of these eventualities, you would undoubtedly grow more and more angry at your neighbour, making a friendly relationship between the two of you impossible. You would also lose a degree of selfrespect, since you would see yourself as the kind of person who can't cope with even a common everyday irritation. Clearly, non-ssertion is not a very satisfying course of action either in this case or in other instances.
    According to the passage, non-assertive people do not:

    ALive in denial
    BBelieve in communicating
    CFeel anger at any cost
    DLose a little self respect

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