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CBSE Class 9 Answered

How do quadruples swim naturally with head on water?
Asked by anusha | 10 Oct, 2013, 11:48: AM
answered-by-expert Expert Answer
Quadruple amputees are those who have lost both their legs and hands. Thus, they are not able to move their limbs as normal swimmers do while swimming.
 
Hence, they are provided with special suit having flippers attached to the legs. This enables them to propel in water and are able to swim naturally.
Answered by Romal Bhansali | 14 Oct, 2013, 12:38: PM

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CBSE 9 - Physics
Why do we feel light on our feet when standing in a swimming pool with water up to our armpits ?
Asked by mailtoparvathyprajith | 08 Feb, 2024, 12:13: PM
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CBSE 9 - Physics
A boy throws a steel ball straight up. Consider the motion of the ball only after it has left the boy's hand but before it touches the ground and assume that forces exerted by the air are negligible. For these conditions, the force(s) acting on the ball is (are): a. A downward force of gravity along with a steadily decreasing upward force b. A steadily decreasing upward force from the moment it leaves the boy's hand until it reaches its highest point on the way down there is a steadily increasing downward force of gravity as the object gets closer to the earth c. Constant downward force of gravity along with an upward force that steadily decreases until the ball reaches it highest point on the way down there is only a constant downward force of gravity d. Constant downward force of gravity only
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CBSE 9 - Physics
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CBSE 9 - Physics
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CBSE 9 - Physics
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CBSE 9 - Physics
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Asked by mannatjohn920 | 15 Feb, 2022, 09:57: AM
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CBSE 9 - Physics
Find the force of gravitational attraction between the earth (m = 6 x 1024 kg) and 80 kg man if he is standing at sea level. The distance of man from earth's center is 6.38 x 106 m.
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