Question

Q.Answer the following questions.
1. What is sedimentation ?
2. What is decantation?
3. How will you separate petrol and water?
4. What are the different types of nutrients? State it's functions
5. How scavengers help in cleaning of environment ?
6. Define periodic motion? Give one example.
8. What is different between periodic and non-periodic motion. Give example.
9. Classify the following motion as uniform motion, non-uniform motion and oscillatory motion, car moving with constant speed, bus moving on city road, rotation of earth, riding of cycle in crowded road, pendulum of clock, a swing.​

Answer 1

Answer:

1. Sedimentation is the tendency for particles in suspension to settle out of the fluid in which they are entrained and come to rest against a barrier.
2. Decantation is a process for the separation of mixtures of immiscible liquids or of a liquid and a solid mixture such as a suspension.
3. By Using a separating funnel.
4. They are categorized as proteins, fats, carbohydrates (sugars, dietary fiber), vitamins, and minerals, and perform the following vital functions.
5. Scavengers are the organisms which feed on the dead and decaying matter.so these help the environment to be clean by eating out all the waste matter.
6. Periodic motion, 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.

8.A motion which repeats itself at regular intervals of time is called a periodic motion. A motion which repeats itself, but not at regular intervals of time, is called a non-periodic motion.