Physics
Grade-9
Easy
Question
Which among the following shows circular motion?
- The outer part of a merry-go-round.
- The blades of a moving fan.
- The pendulum of a wall clock.
- Both [a] and [b]
Hint:
Circular motion is a motion in which object moves in a circle with respect to a fixed point.
The correct answer is: Both [a] and [b]
Circular motion is a motion in which object moves in a circle with respect to a fixed point.
A merry go round completes its revolution in a fixed interval of time. This is an example of periodic motion. Also the merry go round moves in a circular path. So it is undergoing a circular motion which is periodic as well.
movement of blades of a ceiling fan is an example of a uniform circular motion.
Both [a] and [b]
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English-2
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.
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.
English-2Grade-9
English-2
Select topic sentence of below paragraph.
According to popular belief, while the dog is man's best friend, the coyote is his worst enemy. The coyote's bad reputation stems from his fondness for small animals; he hunts at night and is especially destructive to sheep, young pigs, and poultry. However, it is sometimes beneficial to coyotes. If valuable farm animals are protected, the coyote will frequently free the property of other animals, such as rabbits, which are destructive to the crops and certain trees. He is especially useful in keeping the rodent population under control. Where coyotes have been allowed to do their work without being harassed, ranchers and fruit growers have found them to be so valuable that they would not shoot them any more than they would shoot their dogs.
Select topic sentence of below paragraph.
According to popular belief, while the dog is man's best friend, the coyote is his worst enemy. The coyote's bad reputation stems from his fondness for small animals; he hunts at night and is especially destructive to sheep, young pigs, and poultry. However, it is sometimes beneficial to coyotes. If valuable farm animals are protected, the coyote will frequently free the property of other animals, such as rabbits, which are destructive to the crops and certain trees. He is especially useful in keeping the rodent population under control. Where coyotes have been allowed to do their work without being harassed, ranchers and fruit growers have found them to be so valuable that they would not shoot them any more than they would shoot their dogs.
English-2Grade-9
English-2
Select topic sentence of below paragraph.
Because electronic computers are now used for data processing, the general public believes it is a mysterious, complicated science and that computers are giant brains. Both of these assumptions are incorrect. A computer is essentially a high-speed adding machine that performs the functions that are programmed into it. If the input data is even slightly changed, the computer will not be able to function until it is programmed to accept the changes. The business operations it performs are impressive only because of the extremely fast manipulation speed, but the majority of these operations have been used for decades. In contrast to humans, computers can perform repetitive calculations without becoming tired or bored.
Select topic sentence of below paragraph.
Because electronic computers are now used for data processing, the general public believes it is a mysterious, complicated science and that computers are giant brains. Both of these assumptions are incorrect. A computer is essentially a high-speed adding machine that performs the functions that are programmed into it. If the input data is even slightly changed, the computer will not be able to function until it is programmed to accept the changes. The business operations it performs are impressive only because of the extremely fast manipulation speed, but the majority of these operations have been used for decades. In contrast to humans, computers can perform repetitive calculations without becoming tired or bored.
English-2Grade-9
English-2
The main idea of a paragraph is introduced by what?
The main idea of a paragraph is introduced by what?
English-2Grade-9
English-2
Good paragraphs should do what?
Good paragraphs should do what?
English-2Grade-9
English-2
A paragraph can be defined as what?
A paragraph can be defined as what?
English-2Grade-9
English-2
Topic sentences can be anywhere in a paragraph, but they are most often
Topic sentences can be anywhere in a paragraph, but they are most often
English-2Grade-9
English-2
The topic sentence contains the
The topic sentence contains the
English-2Grade-9
English-2
A group of sentences about one main idea is a
A group of sentences about one main idea is a
English-2Grade-9
English-2
The topic sentence is:
The topic sentence is:
English-2Grade-9
English-2
Select the topic sentence of the below paragraph.
Social networking sites such as MySpace, Facebook, and Twitter have grown in popularity among people of all ages in recent years. Despite some people's fears that young people are becoming crouching androids glued to their computers, research shows that the vast majority of friendships are still maintained offline. Offline friendships have more interdependence, depth, understanding, and commitment, but online friendships can develop some of these characteristics over time. The majority of online friends are wary of disclosing personal information. This does not seem to apply to people who have a negative view of themselves and others; instead, they appear to share more information, possibly in an attempt to become more self-confident in their interactions. Surprisingly, even in online friendships, people appear to gain more satisfaction when they befriend people their own age and location.
Select the topic sentence of the below paragraph.
Social networking sites such as MySpace, Facebook, and Twitter have grown in popularity among people of all ages in recent years. Despite some people's fears that young people are becoming crouching androids glued to their computers, research shows that the vast majority of friendships are still maintained offline. Offline friendships have more interdependence, depth, understanding, and commitment, but online friendships can develop some of these characteristics over time. The majority of online friends are wary of disclosing personal information. This does not seem to apply to people who have a negative view of themselves and others; instead, they appear to share more information, possibly in an attempt to become more self-confident in their interactions. Surprisingly, even in online friendships, people appear to gain more satisfaction when they befriend people their own age and location.
English-2Grade-9
English-2
Select the topic sentence of the below paragraph.
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.
Select the topic sentence of the below paragraph.
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.
English-2Grade-9
