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Ques-5 one word/one sentences answer type question.
1. Give two example of periodic motion ?
2. What is a habitat ?
3. Why can our elbow not move backwords?
4. What is a ball is socket joint ?
5. Lisy two example each of modes of modes of transport used on land watera and air ?
Answers
Answer:
1.Periodic motion, in physics, motion repeated in equal intervals of time. Periodic motion is performed, for example, by a rocking chair, a bouncing ball, a vibrating tuning fork, a swing in motion, the Earth in its orbit around the Sun, and a water wave.
2.In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical manifestation of its ecological niche.
3.Our elbow cannot move backwards because it has a hinge joint which allows the movement in one plane only.
4.Ball-and-socket joint, also called spheroidal joint, in vertebrate anatomy, a joint in which the rounded surface of a bone moves within a depression on another bone, allowing greater freedom of movement than any other kind of joint.
5.Land transport : Bus train motorbike. Water transport : Boat ship steamer. Air Transport : Aeroplane Helicopter. Give two examples each of dimensionless constants and dimensional variavles.
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