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    Physics
    Grade-9
    Easy

    Question

    Which of the following is not an example of rotational motion?

    1. Movement of the moon on its axis.
    2. Movement of earth on its axis.
    3. Movement of a person on the road.
    4. Movement of blades of a fan.

    Hint:

    “Rotational motion can be defined as the motion of an object around a circular path, in a fixed orbit.”

    The correct answer is: Movement of a person on the road.

      “Rotational motion can be defined as the motion of an object around a circular path, in a fixed orbit.”
      Movement of a person on the road.  is not a Rotational motion 

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      Select topic sentence of below paragraph.
      In the developing world, 1.1 billion people still do not have access to safe drinking water, 2.6 billion do not have access to adequate sanitation services, and waterborne diseases are responsible for more than 1.6 million deaths each year (mostly in children under five). Water is often too expensive or inaccessible to the poorest members of society in developing countries, while the wealthy have it piped into their homes. Furthermore, due to the infrastructure used to control water, entire seas are being lost, rivers are drying up, millions of people have been displaced to make room for reservoirs, groundwater aquifers are being pumped down, and water disputes have raised tensions from local to international levels. Fresh water is a scarce resource in many parts of the world, and it is expected to become even more so as the twenty-first century progresses.

      1. Fresh water is a scarce resource in many parts of the world, and it is expected to become even more so as the twenty-first century progresses.
      2. Water is either prohibitively expensive or inaccessible to the poorest members of society.
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      2. Water is either prohibitively expensive or inaccessible to the poorest members of society.
      3. People do not have adequate access to sanitation services.
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      Select topic sentence of below paragraph.
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      Poverty is a result of Africa's problems, not a cause of them. What African countries require; the West cannot supply. They require individual liberty. This entails a political system that ensures private property rights, free markets, honest government, and the rule of law. The majority of Africa's poverty is self-inflicted. Some may disagree because their college professors taught them that colonialism's legacy explains third world poverty. That is absurd. Canada used to be a colony. Australia, New Zealand, and Hong Kong were also present. In fact, the United States, the world's richest country, was once a colony. Third-world countries such as Ethiopia, Liberia, Nepal, and Bhutan, on the other hand, were never colonies and are home to some of the world's poorest people.

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